Develop Reference

System can't find pip

I first installed Spyder and then afterwards Python on a server (with Windows Server 2019) all on the directory C:\Users\wi932. Now I want to use the command prompt to install packages (e.g. tensorflow) but unfortunately I get the error message that "the command pip is either wrongly written or can't be found "(translated). I am wondering why I get this error because on my normal laptop I type in the exact same commands and there everything is okay.
I have attached a screenshot of the command prompt. I tried to install the packages both in the spyder folder ( C:\Users\wi932.spyder-py3) and the Python folder ( C:\Users\wi932\Python\Python310). I always get the same error.
Does anyone of you have an idea what the problem might be and how to fix it? I'll appreciate every comment.

The directory containing pip is located in <Python directory>\Scripts. To make Windows find it, you need to check the "Add Python to PATH" checkbox during installation.
Some packages, including tensorflow, have no version for the last Python distro, so you need to "downgrade" it by installing an older version, for example, 3.8.

Try installing python in local download it at www.python.org then you can run any command with pip directly in local

I broke an embedded Python installation with a pip install

I use software at work that has python scripting built in. The only downside is it doesn't carry many of the useful modules out there today. Looking at the forum and support for the software the knowledge base had instructions on how to add new modules. All was well for a few things but when trying to install Pandas I kept getting a failed dependency for Numpy, even though Numpy was in fact in the site-packages for that python version.
I made several other attempts and then came across this line of code.
python -m pip install --user numpy scipy matplotlib ipython jupyter pandas sympy nose
I replaced the python with the path to that version of Python and the install went through. But now that Python version is broken. When I open the script editor in the software and try to run ANY code I get an error that says
Cannot initialize the script system: Error in line 1:PyEval_EvalFramesEx returned NULL without setting an error.
Even when I try to run that version of Python in the console the cursor just moves down a line and nothing happens. I can't even type any more.
The older version of the software still works fine, I believe this is due to it using Python 3.4 while this newer version is running Python 3.5. I have even tried to uninstall and reinstall the software for a clean install and I still get the same error, even if I reinstall in a new location. I fear its something system wide specific to that software version of Python 3.5. I have an external Python 3.5 I installed just to check and it runs fine. It's just the software version of Python that is now broken.

You have installed Python projects with compiled components that are loaded into the Python binary. Those components are conflicting with the embedded Python version of your software package (which may not be able to load them).
Because you used the --user switch to install these packages there is still a way out to recover your installation. The packages were all installed into the site.USER_SITE location, which means you can remove them again, manually.
First, you need to run Python with a switch that disables loading code from that location. You can try to do this with either the -s switch (which disables the USER_SITE option) or the -I switch (enabling isolated mode, ignoring environment variables and the USER_SITE option), to verify that disabling these options actually gives you a working Python prompt:
path/to/software/python -s # or -I
When this works, you can run the site module as a script, to print out where the USER_SITE directory is:
path/to/software/python -s -m site # or -I -m site
Look for the USER_SITE: <path> line, it should end in site-packages. Then, move the contents of that directory somewhere else (to keep as a backup). Then try to run Python without the -s / -I switch again.

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.

Pip not installing Python modules to proper directory

So I downloaded a module, but when I tried to use it in a program, Python threw the error:
"ImportError: No module named markovify"
When I go to try to change my .bash_profile, it shows this:
"# Setting PATH for Python 3.5
The orginal version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.5/bin:${PATH}"
export PATH"
I've been using 2.7.10 all this time, and Terminal defaults to it. (When I type in Python, that's the version it says I'm using)
I'm trying to get pip to install modules for python 2.7.10 to a different folder.
What's weird is this: I seem to have installed pyparsing with pip and it seems to work. I tried installing markovify and it throws this error message.
What am I missing?

When I go to try to change my .bash_profile, it prints this
That suggests you're using some tool to change your profile. Did you also use that tool to install markovify? You need to be clear about your environment when you have environment questions! :-)
If you installed markovify from the command line, I'd suggest opening a new terminal and running these commands, just to make sure you're working from where you think you are:
$ python --version
Python 2.7.10
$ command -v python
/usr/bin/python
The most likely problem, it seems to me, is that you got a bit tangled up and wound up doing something other than what you intended. From a fresh start, provided you're starting with the environment you want, pip should, you know, Just Work.
I'm trying to get pip to install modules for python 2.7.10 to a different folder.
That's possible to do, but are you sure that's what you want? Usually if you're using the Python interpreter you intend to, and haven't putzed with PYTHON_PATH & friends, when you run pip, it will install to its default location, which sure enough is where Python will look for it when you say to import it.
As an experiment, you might check if markovify was somehow installed for Python 3.5. Try
$ /Library/Frameworks/Python.framework/Versions/3.5/bin/python -c 'import markovify'
(You might also want to check that the Python interpreter is in fact in that folder and has that name.)

When you're working on more than one Python version, you should work on Virtual Environments:
Virtual Env on Hitchhiker's Guide

Matplotlab .exe file for Python 3.4 cannot find path to Python34

I am running Windows and am a beginner python user trying to install a few modules to run a python script. I have Python 2.7.9 and 3.4.2 both installed to the C:\ directory. I downloaded matplotlib-1.4.3.win-amd64-py3.4.exe and the corresponding .exe for python 2.7 from the Matplotlib website, but when I run the py3.4 exe the program cannot find Python 3.4 to update (Cannot install: Python version 3.4 is required, which is not found in the registry).
Python 2.7 installer works perfectly. Is there a misset PATH variable in Windows I can modify so the .exe can function properly? In CMD 'Python --version' returns Python 3.4, so unsure how to fix the issue. I installed these months ago, and may have put them in Downloads before transferring both to C:\ for clarity, which may be the problem but am unsure how to fix it.
Also, if your answer involves pip in any way please clarify how exactly to use pip in Windows. A lot of websites say to run eg. 'pip setup.py install' in the 'terminal' but do not specify if they mean Windows CMD terminal, IDLE GUI, or Python.exe command-line interface. Thanks a lot!

Not the answer to your actual question, but some clarification on your last point:
but do not specify if they mean Windows CMD terminal, IDLE GUI, or
Python.exe command-line interface.
Yes, this requires to know some context that a beginner may not have. The command pip is always used in the CMD terminal. So open CMD, and enter
pip3 install matplotlib
Notes:
Use pip3 when installing for Python 3. Then you're certain you're not accidentally installing libraries for Python 2.
pip setup.py install does not exist. You're mixing up two mechanisms to install Python packages/libraries:
One uses pip, with aforementioned pip3 install <something>. Pip goes looking online, finds a corresponding package name in a database, retrieves the URL for that package, downloads the package and installs the package. All in one command.
python3 setup.py install (again explicitly use python3 or python2 to be sure) requires you to find the package, download it, unzip it, and then in the CMD terminal, inside the unzipped folder, run the python3 setup.py install command.
This second method is usually for the latest-greatest version of a package that is not yet in pip's database, or for packages that never were in pip's database in the first place.
Generally, as a beginner, you want to stick with pip. If you ever run into the issue with the package not being available via pip, you may still be able to use pip for downloading and installing, like for example so:
pip install https://github.com/matplotlib/matplotlib/archive/master.zip
which would install the most recent matplotlib (which won't have even a version number yet, so bugs could be around).
All of these commands happen in the CMD terminal: downloading/installing packages generally all go through the terminal.
Also, when people mention "terminal", they will mean (for Windows) something like the CMD terminal. When it has to be done inside Python, it is generally called the "Python prompt". (IDLE is yet a different beast, that I'm not familiar with. I'm guessing that it has several parts, including a text editor section and a Python prompt section.)