Develop Reference

I'm trying to make a web browser again using python, when I attempt to run the code, this error message comes up. I'm using PyCharm [duplicate]

I'm running into a weird error when trying to install Django on my computer.
This is the sequence that I typed into my command line:
C:\Python34> python get-pip.py
Requirement already up-to-date: pip in c:\python34\lib\site-packages
Cleaning up...
C:\Python34> pip install Django
'pip' is not recognized as an internal or external command,
operable program or batch file.
C:\Python34> lib\site-packages\pip install Django
'lib\site-packages\pip' is not recognized as an internal or external command,
operable program or batch file.
What could be causing this?
This is what I get when I type in echo %PATH%:
C:\Python34>echo %PATH%
C:\Program Files\ImageMagick-6.8.8-Q16;C:\Program Files (x86)\Intel\iCLS Client\
;C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\S
ystem32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\
Windows Live\Shared;C:\Program Files (x86)\Intel\OpenCL SDK\2.0\bin\x86;C:\Progr
am Files (x86)\Intel\OpenCL SDK\2.0\bin\x64;C:\Program Files\Intel\Intel(R) Mana
gement Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine C
omponents\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components
\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\P
rogram Files (x86)\nodejs\;C:\Program Files (x86)\Heroku\bin;C:\Program Files (x
86)\git\cmd;C:\RailsInstaller\Ruby2.0.0\bin;C:\RailsInstaller\Git\cmd;C:\RailsIn
staller\Ruby1.9.3\bin;C:\Users\Javi\AppData\Roaming\npm

You need to add the path of your pip installation to your PATH system variable. By default, pip is installed to C:\Python34\Scripts\pip (pip now comes bundled with new versions of python), so the path "C:\Python34\Scripts" needs to be added to your PATH variable.
To check if it is already in your PATH variable, type echo %PATH% at the CMD prompt
To add the path of your pip installation to your PATH variable, you can use the Control Panel or the setx command. For example:
setx PATH "%PATH%;C:\Python34\Scripts"
Note:
According to the official documentation, "[v]ariables set with setx variables are available in future command windows only, not in the current command window". In particular, you will need to start a new cmd.exe instance after entering the above command in order to utilize the new environment variable.
Thanks to Scott Bartell for pointing this out.

For Windows, when you install a package, you type:
python -m pip install [packagename]

As of now, version 3.7.3 I had a little bit of an issue with getting the right system variable.
Try this:
Type start %appdata% in cmd.
After that file explorer should pop up in ../AppData/Roaming.
Go back one directory and navigate to Local/Programs/Python/Python37-32/Scripts.
NOTE: The version number may be different so if you copy and paste the above file path it could not work.
After you do this you now have the correct location of your downloaded Python. Copy your file path by selecting the whole directory in the address bar.
Once you do that click the start icon and navigate to the Control Panel → System and Security → System. Then click "Advanced System Settings" on the left side of the panel.
Once there, click Environment Variables on the bottom right and there will be two boxes, an upper and a lower box. In the upper box: Click on the 'Path' Variable and click Edit located on the right. Click New and paste your directory Path. It should look something like this:
Click OK three times, open a new window of cmd and type: pip. See if it works.

For me the command:
set PATH=%PATH%;C:\Python34\Scripts
worked immediately (try after echo %PATH% and you will see that your path has the value C:\Python34\Scripts).
Thanks to: Adding a directory to the PATH environment variable in Windows

Alternate way.
If you don't want to add the PATH as the previous well written answers pointed out,
but you want to execute pip as your command then you can do that with py -m as prefix.
Given that you have to do it again and again.
eg.
py -m <command>
as in
py -m pip install --upgrade pip setuptools
Also make sure to have pip and py installed

The only way that worked on my Windows 10 machine was as follows:
py -3 -m pip install xxxxx

Also, the long method - it was a last resort after trying all previous answers:
C:\python27\scripts\pip.exe install [package].whl
This after cd in directory where the wheel is located.

As per Python 3.6 Documentation
It is possible that pip does not get installed by default. One
potential fix is:
python -m ensurepip --default-pip

Control Panel -> add/remove programs -> Python -> Modify -> optional Features (you can click everything) then press next -> Check "Add python to environment variables" -> Install
And that should solve your path issues, so jump to command prompt and you can use pip now.

Go to control Panel >> Uninstall or change Program and double click on Python XXX to modify install. Make sure PIP component is checked and install.

I was having the same problem just now.
After adding the proper folder (C:\Python33\Scripts) to the path, I still could not get pip to run. All it took was running
pip.exe install -package- instead of
pip install -package-.

Try going to Windows PowerShell or cmd prompt and typing:
python -m pip install openpyxl

In latest version Python 3.6.2 and above, is available in
C:\Program Files (x86)\Python36-32\Scripts
You can add the path to our environment variable path as below
Make sure you close your command prompt or Git after setting up your path. Also should you open your command prompt in administrator mode. This is example for Windows 10.

Use
set Path = `%PATH%;C:\Python34\;C:\Python27\Scripts`
Source

Or if you are using PyCharm (2017-03-03) like me, just change directory in terminal and install:
cd C:\Users\{user}\PycharmProjects\test\venv\Scripts
pip install ..

Most frequently it is:
in cmd.exe write
python -m pip install --user [name of your module here without brackets]

Even I'm new to this, but pip install django worked for me.
The path should be set as where the script folder of the Python installation is, i.e.C:\Python34\Scripts.
I suppose it's because Django is a framework which is based on Python, and that's why this directory structure has to be maintained while installing.

I have just installed Python 3.6.2.
I got the path as
C:\Users\USERNAME\AppData\Local\Programs\Python\Python36-32\Scripts

In Windows, open cmd and find the location of PYTHON_HOME using where python. Now add this location to your environment variable PATH using:
set PATH=%PATH%;<PYTHON_HOME>\Scripts
Or refer to this.
In Linux, open a terminal and find the location of PYTHON_HOME using which python. Now add the PYTHON_HOME/Scripts to the PATH variable using:
PATH=$PATH:<PYTHON_HOME>\Scripts
export PATH

You can try pip3. Something like:
pip3 install pandas

I was facing the same issue. Run Windows PowerShell as Administrator. It resolved my issue.

None of these actually worked for me, but running
python -m pip install -U pip
and then adding the specified directory to the PATH as suggested got it working

In your Python folder path in Terminal, just type
py -m pip
in order to check the current version of your pip.
You will also see a list of commands, you can use...

I think from Python 2.7.9 and higher pip comes pre installed and it will be in your scripts folder.
So you have to add the "scripts" folder to the path. Mine is installed in C:\Python27\Scripts. Check yours to see what your path is so that you can alter the below accordingly. Then go to PowerShell, paste the below code in PowerShell and hit Enter key. After that, reboot and your issue will be resolved.
[Environment]::SetEnvironmentVariable("Path", "$env:Path;C:\Python27\Scripts", "User")

In a Windows environment, just execute the below commands in a DOS shell.
path=%path%;D:\Program Files\python3.6.4\Scripts;
(new path=current path;path of the Python script folder)

I deleted the older version using the control panel and then installed the new version however the newer version was not reflecting pip even after adding the right paths in the environment variables. However, the thing that worked for me was deleting the folders of old python that were there in the local App folder even after uninstall. For me, the path was like below. Deleting this folder solved my issue
C:\Users\username\AppData\Local\Programs\Python38

'pip' is not recognized as an internal or external command
pip is a python module used to install packages. For your problem, there can be many reasons;
Restart CMD/Terminal
Environment variable is not set. pip is installed but environment variable is not set. Environment variable is a windows variable where pip path is saved, so it can be run at run time.
pip is not installed.
Restart CMD/Terminal
It is sometimes possible that you opened your command prompt or terminal before installing pip and now it just needs a restart to pick up the latest environment variables. It is worth trying just restarting your command prompt or terminal.
Environment Variable is Not Set
Open CMD and run this command to see the values set in the PATH environment variable.
echo %PATH%
This will echo the PATH environment variable like this;
You should check if your path exist in the echoed PATH list. For example, in my case, the path for pip.exe files is C:\Python310\Scripts. You can check this path yourself like this;
If you can find pip path and it does not exist the echoed PATH variable, then we need to add it. Copy the path like C:\Python310\Scripts.
Go to Start > This PC > Properties > Advance system settings >
Advanced > Environment Variables
As shown in the image above, Select Path, click Edit button and add the copied path. Restart the CMD and test pip command again.
pip is Not Installed
If pip is not installed, you can install it again by downloading latest python.exe setup from python.org website. Make sure you check mark the pip option as shown in the image below.
In the next step, check mark "Add Python to environment variables"

I had this same issue. You just need to go to your
C:\Python27\Scripts
and add it to environment variables. After path setting just run pip.exe file on C:\Python27\Scripts and then try pip in cmd. But if nothing happens try running all pip applications like pip2.7 and pip2.exe. And pip will work like a charm.

Small clarification: in "Windows 7 64 bit PC", after adding ...Python34\Scripts to the path variable, pip install pygame didn't work for me.
So I checked the "...Python34\Scripts" folder, it didn't have pip, but it had pip3 and pip3.4. So I ran pip3.4 install pygame .... .whl. It worked.
(Further open a command window in the same folder where you have the downloaded pygame...whl file.)

When installing SQL 2019 Python, there are known issues for PIP which require a fix (step 7)
https://learn.microsoft.com/en-us/sql/advanced-analytics/known-issues-for-sql-server-machine-learning-services?view=sql-server-ver15
pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Workaround
Copy the following files:
libssl-1_1-x64.dll
libcrypto-1_1-x64.dll
from the folder
C:\Program Files\Microsoft SQL Server\MSSSQL15.MSSQLSERVER\PYTHON_SERVICES\Library\bin
to the folder
C:\Program Files\Microsoft SQL Server\MSSSQL15.MSSQLSERVER\PYTHON_SERVICES\DLLs
Then open a new DOS command shell prompt.

PyGame cannot load a file when coverted with Autopytoexe [duplicate]

I have python 3.9 I used the command 'pip install auto-py-to-exe' and it downloaded but when I tried to using the command 'auto-py-to-exe' the program just said " 'auto-py-to-exe' is not recognized as an internal or external command, operable program or batch file.". I have the latest version of PIP and I also have PATH. What can I do to fix this?

This works on VSCode:
python -m auto_py_to_exe

If I install "auto-py-to-exe" using following command, as described in this link as well as from the comment from Justin Ezequiel (above):
python -m pip install auto-py-to-exe
I am able to run it (in Windows 10) using following command:
python -m auto_py_to_exe

This gave me quite a bit of trouble, as none of the above solutions worked for me. Spent lots of time trying to figure out what I should be adding to PATH with no success.
My issue stemmed from (I think) the fact that I have been using python downloaded from the windows store, which uses a different location to store python in.
With the manual install of python (https://www.python.org) you can specify where python is downloaded and automatically add that location to path.
Steps I took to solve the problem:
Uninstall all versions of python downloaded from the windows store via settings (settings > apps > python > uninstall)
Uninstall all version of python via the control panel (control panel > add or remove programs > python x.x.x > uninstall)
Uninstall auto-py-to-exe (pip uninstall auto-py-to-exe) in case it didnt do that automatically
Install python from python.org. (auto-py-to-exe is not supported in versions greater than 3.10 as of 1/23/2023). So I installed Python 3.10
The settings which were successful for me were:
Custom installation,
check install python for all users,
check add to path,
input 'C:\Python310' (with the respective version number) for install location,
install
Check new python version has been installed python --version
Check pip is installed pip --version
Install auto-py-to-exe pip install auto-py-to-exe
When auto-py-to-exe finishes installing, scroll up through the install info and make sure there are no warnings that state there is a location not found in PATH. If there are, you'll have to do some other research on adding those locations to PATH appropriately (since I don't think I was doing that right).
Assuming no PATH warnings,
9. Run auto-py-to-exe

First you need to type in the terminal (not Python):
auto-py-to-exe
If you are currently in python use exit() to exit then try the above code.

It Depends on in which environment you have installed
Make sure to replace {User} with your user
In Conda Enviournment go to below location Manually
C:\Users\{User}\anaconda3\Scripts\auto-py-to-exe.exe
In Pip, Environment go to the location below
C:\Users\{User}\AppData\Local\Programs\Python\Python37-32\Scripts\auto-py-to-exe.exe
or you can add this path to your environment variable as well for accessing these from anywhere

First check you installed it
pip install auto-py-to-exe
then restart your vscode and check another time.
If still an error, check it in CMD.

As suggested above use:
pip show --files auto-py-to-exe to find out in what directory pip has
installed the scripts. Double check the directory is in %PATH%
This will show you where the installer has placed the binary files. I then changed to that directory which circumvents any path issue. I tried to run the files and found :
OSError: [WinError 1920] The file cannot be accessed by the system: 'C:\\Users\\aaaa\\AppData\\Local\\Microsoft\\WindowsApps\\PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0\\python.exe'
PS C:\users\aaaa\appdata\local\packages\pythonsoftwarefoundation.python.3.7_qbz5n2kfra8p0\localcache\local-packages\python37\Scripts>
In my case, although I haven't worked out how to fix it yet... It would seem to be trying to refer to an incorrect Python executable, the files in that directory are all 0 length. Unfortunately the "python -m" suggestion didn't work for me, so it's back to the drawing board. Hope that helps you confirm if it's the right solution to chase down.

You need to make sure you have typed cd C:\Users\your_user_name\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts as a separate command, and then auto-py-to-exe with python 3. Check in file explorer to make sure your path is correct if the cd fails.

how to fix 'auto-py-to-exe' is not recognized as an internal or external command, operable program or batch file

I have python 3.9 I used the command 'pip install auto-py-to-exe' and it downloaded but when I tried to using the command 'auto-py-to-exe' the program just said " 'auto-py-to-exe' is not recognized as an internal or external command, operable program or batch file.". I have the latest version of PIP and I also have PATH. What can I do to fix this?

This works on VSCode:
python -m auto_py_to_exe

If I install "auto-py-to-exe" using following command, as described in this link as well as from the comment from Justin Ezequiel (above):
python -m pip install auto-py-to-exe
I am able to run it (in Windows 10) using following command:
python -m auto_py_to_exe

This gave me quite a bit of trouble, as none of the above solutions worked for me. Spent lots of time trying to figure out what I should be adding to PATH with no success.
My issue stemmed from (I think) the fact that I have been using python downloaded from the windows store, which uses a different location to store python in.
With the manual install of python (https://www.python.org) you can specify where python is downloaded and automatically add that location to path.
Steps I took to solve the problem:
Uninstall all versions of python downloaded from the windows store via settings (settings > apps > python > uninstall)
Uninstall all version of python via the control panel (control panel > add or remove programs > python x.x.x > uninstall)
Uninstall auto-py-to-exe (pip uninstall auto-py-to-exe) in case it didnt do that automatically
Install python from python.org. (auto-py-to-exe is not supported in versions greater than 3.10 as of 1/23/2023). So I installed Python 3.10
The settings which were successful for me were:
Custom installation,
check install python for all users,
check add to path,
input 'C:\Python310' (with the respective version number) for install location,
install
Check new python version has been installed python --version
Check pip is installed pip --version
Install auto-py-to-exe pip install auto-py-to-exe
When auto-py-to-exe finishes installing, scroll up through the install info and make sure there are no warnings that state there is a location not found in PATH. If there are, you'll have to do some other research on adding those locations to PATH appropriately (since I don't think I was doing that right).
Assuming no PATH warnings,
9. Run auto-py-to-exe

First you need to type in the terminal (not Python):
auto-py-to-exe
If you are currently in python use exit() to exit then try the above code.

It Depends on in which environment you have installed
Make sure to replace {User} with your user
In Conda Enviournment go to below location Manually
C:\Users\{User}\anaconda3\Scripts\auto-py-to-exe.exe
In Pip, Environment go to the location below
C:\Users\{User}\AppData\Local\Programs\Python\Python37-32\Scripts\auto-py-to-exe.exe
or you can add this path to your environment variable as well for accessing these from anywhere

First check you installed it
pip install auto-py-to-exe
then restart your vscode and check another time.
If still an error, check it in CMD.

As suggested above use:
pip show --files auto-py-to-exe to find out in what directory pip has
installed the scripts. Double check the directory is in %PATH%
This will show you where the installer has placed the binary files. I then changed to that directory which circumvents any path issue. I tried to run the files and found :
OSError: [WinError 1920] The file cannot be accessed by the system: 'C:\\Users\\aaaa\\AppData\\Local\\Microsoft\\WindowsApps\\PythonSoftwareFoundation.Python.3.7_qbz5n2kfra8p0\\python.exe'
PS C:\users\aaaa\appdata\local\packages\pythonsoftwarefoundation.python.3.7_qbz5n2kfra8p0\localcache\local-packages\python37\Scripts>
In my case, although I haven't worked out how to fix it yet... It would seem to be trying to refer to an incorrect Python executable, the files in that directory are all 0 length. Unfortunately the "python -m" suggestion didn't work for me, so it's back to the drawing board. Hope that helps you confirm if it's the right solution to chase down.

You need to make sure you have typed cd C:\Users\your_user_name\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.9_qbz5n2kfra8p0\LocalCache\local-packages\Python39\Scripts as a separate command, and then auto-py-to-exe with python 3. Check in file explorer to make sure your path is correct if the cd fails.

I can't use pip (Windows)

I'm wanting to learn machine learning, but it requires that I use 'pip.' I'm still very new to a lot of this stuff. I've installed Python 3.4 64-bit and get-py.py.
When I run pip install sklearn I get 'pip' is not recognized as an internal or external command, operable program or batch file.
Here's a screenshot of my environmental variable PATH
https://gyazo.com/c7ec926401878845d5c4f9a556cf00ee
Any help would be greatly appreciated. I have checked out other posts where people had similar issues, but I tried various things and nothing worked.

Easiest solution is to just download a platform like Anaconda for example. It is Python with many libraries (sklearn, pandas, numpy, ...) and also with pip, all in a user-friendly Windows installer package, that takes care of everything for you.
https://www.continuum.io/downloads
If you really want to do it yourself, then
download get-pip.py (https://bootstrap.pypa.io/get-pip.py)
make sure you have Python installed and in your PATH, for example by running python --version in command prompt
Navigate to the directory, where you downloaded get-pip.py (in command prompt using the command cd).
Run the command python get-pip.py from a command prompt with admin privileges (possibly not needed, but just to make sure).
This should be all. Close your command prompt, open it again and run pip --version to test it. If it doesn't work, then search your computer for a file named pip.exe (most likely in your Python directory) and if you find it, add its path to your PATH variable (given the screenshot, I assume you know how to do this).

I downloaded Python 3.6 and the pip was installed on my system.
I found pip at below location:
C:\Users\Admin\AppData\Local\Programs\Python\Python36\Scripts
Also, before I found pip I used below command on my command prompt to install pyperclip:
python -m pip install pyperclip

For anyone that might have installed Python using the MSI installer, and ticked the box to include pip, but still gets the error 'pip' is not recognized as an internal or external command, operable program or batch file:
It looks like that the pip executable is installed in the \Scripts subdirectory of the Python installation, but that directory does not get automatically added to PATH.
For me, since I had installed Python 2.7, the directory was C:\Python27\Scripts. After adding this path to the PATH environment variable, and open a new CMD window, pip was available as a command.

I've made a workaround that will help you, copy the batch script below and modify it as specified:
#"PATH to python.exe" "PATH to pip.exe" %*
For example like this:
#"C:\programming\bin\python374\python.exe" "C:\programming\bin\python374\Scripts\pip.exe" %*
Save this file as pip.bat on Desktop and then move it to C:\Windows\system32.

For Python 3.7 or higher at least (as today is October 4th 2019) in the installation window you need to check the box "add to PATH" when you first install Python.

I'm late now, but just add python to your environment variables.
It´s explained in this short video, how to set up python to your environment variables:
https://www.youtube.com/watch?v=Y2q_b4ugPWk
after that pip should work on your cmd prompt, without cd to
"C:\Users\Admin\AppData\Local\Programs\Python\Python36\Scripts"

This is late but in case anyone runs across this issue, pip installed for me as "pip3". Once I used pip3 as my command and not pip, it worked fine. Threw me for quite a loop since I've been using Python for years.

PIP Install and Upgrade
Ensure you are accessing the right location while accessing pip as shown in my link above. Starting Python 3.4, it is included by default with the Python binary installers.
Environment Variable
It is also a good idea to update the environment variable if the path is not accessible by default, once the installation is complete.

If it is specifically pip you want you could install python again making sure to tick the install pip box which it sounds like you failed to upon initial installation.

Fatal error in launcher: Unable to create process using ""C:\Program Files (x86)\Python33\python.exe" "C:\Program Files (x86)\Python33\pip.exe""

Searching the net this seems to be a problem caused by spaces in the Python installation path.
How do I get pip to work without having to reinstall everything in a path without spaces ?

it seems that
python -m pip install XXX
will work anyway (worked for me)
(see link by user474491)

On Windows at least, pip stores the execution path in the executable pip.exe when it is installed.
Edit this file using a hex editor or WordPad (you have to save it as plain text then to retain binary data), change the path to Python with quotes and spaces like this:
#!"C:\Program Files (x86)\Python33\python.exe"
to an escaped path without spaces and quotes and pad with spaces (dots at the end should be spaces):
#!C:\Progra~2\Python33\python.exe.............
For "C:\Program Files", this path would probably be "C:\Progra~1" (shortened path names in DOS / Windows 3.x notation use tilde and numbers).
Windows provides this alternative notation for backwards compatibility with DOS / Windows 3.x apps.
Note that as this is a binary file, you should not change the file size which may break the executable, hence the padding.
Save with administrator privileges, make sure it is actually saved at the target location and try again.
You might also need to set the PATH variable to use the ~ notation for the path to pip.

having the same trouble I read in https://pip.pypa.io/en/latest/installing.html#install-pip that to update pip it's:
python -m pip install -U pip
So I made (for example)
python -m pip install virtualenv
And it worked! So you can do the same being 'virtualenv' another package you want.

python -m pip
really works for the problem Fatal error in launcher: Unable to create process using '"'.Worked on Windows 10

I had a similar issue and upgrading pip fixed it for me.
python -m pip install --upgrade pip
This was on Windows and the path to python inside pip.exe was incorrect. See Archimedix answer for more information about the path.

Here's how I solved it:
open pip.exe in 7zip and extract __main__.py to Python\Scripts folder.
In my case it was C:\Program Files (x86)\Python27\Scripts
Rename __main__.py to pip.py
Run it! python pip.py install something
EDIT:
If you want to be able to do pip install something from anywhere, do this too:
rename pip.py to pip2.py (to avoid import pip errors)
make C:\Program Files (x86)\Python27\pip.bat with the following contents:
python "C:\Program Files (x86)\Python27\Scripts\pip2.py" %1 %2 %3 %4
%5 %6 %7 %8 %9
add C:\Program Files (x86)\Python27 to your PATH (if is not already)
Run it! pip install something

This is a known Bug when there is a space in the virtualenv path. Correction has been made, and will be available in the next version.

i had same issue and did a pip upgrade using following and now it works fine.
python -m pip install --upgrade pip

I renamed the executable of python.exe to e.g. python27.exe. In respect to the answer of Archimedix I opened my pip.exe with a Hex-Editor, scrolled to the end of the file and changed the python.exe in the path to python27.exe. While editing make shure you don't override other informations.

I wrote a script to patch those exe. But the best way is to fix distutil itself.
"""Fix "Fatal error in launcher: Unable to create process using ..." error. Put me besides those EXE made by pip. (They are made by distutils, and used by pip)"""
import re
import sys
import os
from glob import glob
script_path = os.path.dirname(os.path.realpath(__file__))
real_int_path = sys.executable
_t = script_path.rpartition(os.sep)[0] + os.sep + 'python.exe'
if script_path.lower().endswith('scripts') and os.path.isfile(_t):
real_int_path = _t
print('real interpreter path: ' + real_int_path)
print()
for i in glob('*.exe'):
with open(i, 'rb+') as f:
img = f.read()
match = re.search(rb'#![a-zA-Z]:\\.+\.exe', img)
if not match:
print("can't fix file: " + i)
continue
int_path = match.group()[2:].decode()
int_path_start = match.start() + 2
int_path_end = match.end()
if int_path.lower() == real_int_path.lower():
continue
print('fix interpreter path: %s in %s' % (int_path, i))
f.seek(int_path_start)
f.write(real_int_path.encode())
f.write(img[int_path_end:])

I had the same issue on windows 10, after trying all the previous solution the problem persists so I decided to uninstall my python 2.7 and install the version 2.7.13 and it works perfectly.

This can happen if you are using a case-sensitive file system on Windows. You can tell if this is the case if there is both a lib directory and a Lib directory in your venv directory :
> dir
Directory: C:\git\case\sensitive\filesystem\here\venv
Mode LastWriteTime Length Name
---- ------------- ------ ----
d----- 4/07/2018 4:10 PM Include
d----- 22/01/2019 7:52 AM Lib
d----- 22/01/2019 7:52 AM lib
d----- 22/01/2019 7:52 AM Scripts
d----- 22/01/2019 7:52 AM tcl
To workaround this (until virtualenv.py gets fixed: https://github.com/pypa/virtualenv/issues/935) merge the two lib directories and make venv case-insensitive:
cd venv
move Lib rmthis
move .\rmthis\site-packages\ lib
rmdir rmthis
fsutil.exe file setCaseSensitiveInfo . disable

Here is how i fixed it.
Download https://bootstrap.pypa.io/get-pip.py
Active your vitualenv
Navigate to the get-pip.py file and type "python get-pip.py" without quote.
it will reinstall your pip within the environment and uninstall the previous version automatically.
now boom!! install whatever you like

Please add this address :
C:\Program Files (x86)\Python33
in Windows PATH Variable
Though first make sure this is the folder where Python exe file resides, then only add this path to the PATH variable.
To append addresses in PATH variable, Please go to
Control Panel -> Systems -> Advanced System Settings -> Environment
Variables -> System Variables -> Path -> Edit ->
Then append the above mentioned path & click Save

I added my anwer because I have getting the same error while configure ODDO9 source code in local and its need the exe to run while run exe, I got the same error.
From yesterday I was configure oddo 9.0 (section :- "Python dependencies listed in the requirements.txt file.") and its need to run PIP exe as
C:\YourOdooPath> C:\Python27\Scripts\pip.exe install -r requirements.txt
My oddo path is :- D:\Program Files (x86)\Odoo 9.0-20151014
My pip location is :- D:\Program Files (x86)\Python27\Scripts\pip.exe
So I open command prompt and go to above oddo path and try to run pip exe with these combination, but not given always above error.
D:\Program Files (x86)\Python27\Scripts\pip.exe install -r requirements.txt
"D:\Program Files (x86)\Python27\Scripts\pip.exe install -r requirements.txt"
Python27\Scripts\pip.exe install -r requirements.txt
"Python27/Scripts/pip.exe install -r requirements.txt"
I resolved my issue by the #user4154243 answer, thanks for that.
Step 1: Add variable(if your path is not comes in variable's path).
Step 2: Go to command prompt, open oddo path where you installed.
Step 3: run this command python -m pip install XXX will run and installed the things.

i solve my problem in Window
if u install both python2 and python3
u need enter someone \Scripts change all file.exe to file27.exe,then it solve
my D:\Python27\Scripts edit django-admin.exe to django-admin27.exe so it done

My exact problem was (Fatal error in launcher: Unable to create process using '"') on windows 10. So I navigated to the "C:\Python33\Lib\site-packages" and deleted django folder and pip folders then reinstalled django using pip and my problem was solved.

I have chosen to install Python for Windows (64bit) not for all users, but just for me.
Reinstalling Python-x64 and checking the advanced option "for all users" solved the pip problem for me.

On Windows I had solved this problem in the following way :
1) uninstalled Python
2) navigated to C:\Users\MyName\AppData\Local\Programs(your should turn on hidden files visibility Show hidden files instruction)
3) deleted 'Python' folder
4) installed Python

this worked for me
python -m pip install --upgrade --force-reinstall pip

Try reinstall by using the below link,
Download https://bootstrap.pypa.io/get-pip.py
After download, copy the "get-pip.py" to python installed main dirctory, then open cmd and navigate to python directory and type "python get-pip.py" (without quotes)
Note: Also make sure the python directory is set in the environmental variable.
Hope this might help.

For me this problem appeared when I changed the environment path to point to v2.7 which was initially pointing to v3.6. After that, to run pip or virtualenv commands, I had to python -m pip install XXX as mentioned in the answers below.
So, in order to get rid of this, I ran the v2.7 installer again, chose change option and made sure that, add to path option was enabled, and let the installer run. After that everything works as it should.

I had this issue and the other fixes on this page didn't fully solve the problem.
What did solve the problem was going in to my system environment variables and looking at the PATH - I had uninstalled Python 3 but the old path to the Python 3 folder was still there. I'm running only Python 2 on my PC and used Python 2 to install pip.
Deleting the references to the nonexistent Python 3 folders from PATH in addition to upgrading to the latest version of pip fixed the issue.

I had a simpler solution. Using #apple way but rename main.py to pip.py then put it in your python version scripts folder and add scripts folder to your path access it globally. if you don't want to add it to path you have to cd to scripts and then run pip command.

I have similar problem when I reinstall my python, by uninstalling python3.7 and installing python3.8. But I solved it by removing the previous version of python directory. For me it was located here,
C:\Users\your-username\AppData\Local\Programs\Python
I deleted the folder named Python37 (for previous version) and keep Python38 (for updated version). This worked because python itself seems having a trouble on finding the right directory for your python scripts.

I was trying to install some site-packages like numpy, xgboost and so on, but this error showed up every time:
Fatal error in launcher: Unable to create process using
I've tried many ways to solve this problem and found this one, that successfully helped me:
python -m pip freeze
Hope it'll help someone too.
P.S. I found this solution here: https://stackoverflow.com/a/39733705/10310794

You can remove previous python folder and also environment variable path from you pc then Reinstall python .it will be solve

I had this problem when using django rest framework and simplejwt. All I had to was upgrade pip and reinstall the packages

I had this problem today. The reason I was getting the error is because I have a project stored on Dropbox that I access from 2 different computers.
I am using venv, and because I had venv setup on machine A, if I attempted to run pytest on machine B I would get the error.
Deleting the venv folder, and running python -m venv venv solved the issue for me.

Instead of calling ipython directly, it is loaded using Python such as
$ python "full path to ipython.exe"