Develop Reference

Install PyQt5.15.4 from tar.gz file

I'm trying to install PyQt5.15.4 on a remote desktop that is not connected to internet (Anaconda distribution and PyCharm installed), hence I downloaded the tar.gz files from https://pypi.org/project/PyQt5/#files and tried to use this solution : Python import library from tar.gz? (it worked for other libraries I had to install such as python-docx). The problem is that there is no setup.py file. There is a configure.py file (I imagine it roughly do the same job), so I tried in cmd :
python configure.py install --prefix=<full path folder I used for other libraries I needed>
but I get:
Usage: python configure.py [opts] [name=value] [name+=value]
configure.py: error: no such option: --prefix
Do you have a tip ?

Download PyQT5 from here. https://www.riverbankcomputing.com/pypi/packages/PyQt5/PyQt5-5.15.5.dev2108100905.tar.gz#md5=b39c03d821123c37715daffb0c1c3bb1
This will download tar.gz fie. open the terminal, CD through the relative path, paste the command here.
pip install PyQt5-5.15.5.dev2108100905.tar.gz
if you have your own tar.gz. Then use the name of that file, which will install automatically.
pip install yourfile.tar.gz
Please let me know if that works

Does the pip option "--force-reinstall" recompiles a module? (I'm trying to reinstall cx_Oracle)

My setup has:
- oracle-instantclient (downgraded from 12 to 11)
- Virtual Environment with Python + Django + cx_Oracle
When I downgraded the oracle-instantclient, I tried to reinstall cx_oracle using:
pip install --upgrade --force-reinstall cx_Oracle
The problem is that cx_Oracle keeps complaining that I'm not using the previous installed version 12:
$ python -c "import cx_Oracle"
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: libclntsh.so.12.1: cannot open shared object file: No such file or directory
So, some questions here: "--force-reinstall" is not supposed to make a full reinstall, including a module recompile (aka cx_Oracle)? Somebody has some suggestion about how to workaround this issue? I looked at the pip manual and just tells me that it reinstalls the package. Not very useful.
Update1:
I tried to follow the solution here, adding my cx_Oracle path to the LD_LIBRARY_PATH but it's still not working.
echo $LD_LIBRARY_PATH
/usr/lib/oracle/11.2/client64/lib:/home/myuser/myuserenv/lib/python3.5/site-packages/cx_Oracle-5.2.1.dist-info
Note that my root user has a different python while my virtualenv uses its own python installation.
[root#myserver]# which python
/usr/bin/python
From my virtual environment:
(myvirtualenv) [myuser#myserver]$ which python
~/myvirtualenv/bin/python
Is there some way of installing cx_Oracle manually using my root user but putting the files at the virtual environment somehow?
Update2:
I tried to download cx_Oracle and compile manually using the following command:
sudo -u myuser ~/myvirtualenv/bin/python setup.py build install
But now I'm seeing some permission errors:
(...)
error: could not create 'build/bdist.linux-x86_64/egg': Permission denied
Am I doing the right thing? I don't want to mess this environment. Thanks.

The answer to your question (although you seem to have had another problem) is as follows:
It depends on the module's structure. If its setup script calls the compiler, then yes it does. Because, you see, pip modules by default do not include compiled parts, it's up to the module author to provide them.

I could finally install. The problem is that I had to use the python of my virtualenv. A simple solution but that I completely missed.
Steps:
pip download cx_Oracle
tar -xvf cx_Oracle-5.2.1.tar.gz
~/myenv/bin/python setup.py -v build
sudo ~/myenv/bin/python setup.py install
Note that I had to use sudo in the last step. Without this I was having this permission error:
error: could not create 'build/bdist.linux-x86_64/egg': Permission denied

Why am I getting ImportError: No module named pip ' right after installing pip?

I have installed pip and ez setup. I also checked the system path and I can see the module in the folder structure. Still when i try to run pip command, I get an Import error saying no module named pip. I am running 32bit python on a windows7 machine

Just be sure that you have include python to windows PATH variable, then run python -m ensurepip

After running get_pip.py with python embed you have to modify your pythonXX._pth file. Add Lib\site-packages, to get something like this:
pythonXX.zip
.
Lib\site-packages
# Uncomment to run site.main() automatically
#import site
If you don't you will get this error:
ModuleNotFoundError: No module named 'pip'
or
python-3.8.2-embed-amd64\python.exe: No module named pip
λ pip
Traceback (most recent call last):
File "runpy.py", line 193, in _run_module_as_main
File "runpy.py", line 86, in _run_code
File "python-3.8.2-embed-amd64\Scripts\pip.exe\__main__.py", line 4, in <module>
ModuleNotFoundError: No module named 'pip'
λ python -m pip
python-3.8.2-embed-amd64\python.exe: No module named pip

This issue occurs with me while I was trying to upgrade pip version.
It was resolved with the following commands:
python -m ensurepip
The above command restores the pip and below mentioned upgrades it.
python -m pip install --upgrade pip

What solved the issue on my case was go to:
cd C:\Program Files\Python37\Scripts
And run below command:
easy_install.exe pip

Follow steps given in https://michlstechblog.info/blog/python-install-python-with-pip-on-windows-by-the-embeddable-zip-file/. Replace x with version number of Python.
Open the pythonxx.__pth file, located in your python folder.
Edit the contents (e.g. D:\Pythonx.x.x to the following):
D:\Pythonx.x.x
D:\Pythonx.x.x\DLLs
D:\Pythonx.x.x\lib
D:\Pythonx.x.x\lib\plat-win
D:\Pythonx.x.x\lib\site-packages

try to type pip3 instead pip.
also for upgrading pip dont use pip3 in the command
python -m pip install -U pip
maybe it helps

turned out i had 2 versions of python on my laptop
both commands worked for me
python -m ensurepip
py -m ensurepip
both with another installation path
c:\tools\python\lib\site-packages
c:\program files (x86)\microsoft visual studio\shared\python36_64\lib\site-packages
only the first path was in my %PATH% variable

First make sure that python is added in environment variable.
Try checking the version of pip or pip3. Use these commands to check.
For pip:
pip --version
For pip3:
pip3 --version
If you can see any version of pip and still not able to use it, then run the following command.
python -m ensurepip
This ensures the pip in your system.

Running these 2 commands helped me:
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py

If you wrote
pip install --upgrade pip
and you got
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 20.2.1
Uninstalling pip-20.2.1:
ERROR: Could not install packages due to an EnvironmentError...
then you have uninstalled pip instead install pip.
This could be the reason of your problem.
The Gorodeckij Dimitrij's answer works for me.
python -m ensurepip

I found this post while looking for a solution for the same problem. I was using an embedded python distribution. In this case, the solution is to uncomment import site in the file python<version>._pth.

The ensurepip module was added in version 3.4 and then backported to 2.7.9.
So make sure your Python version is at least 2.7.9 if using Python 2, and at least 3.4 if using Python 3.

I'v solved this error by setting the correct path variables
C:\Users\name\AppData\Local\Programs\Python\Python37\Scripts
C:\Users\name\AppData\Local\Programs\Python\Python37\Lib\site-packages

I was facing same issue and resolved using following steps
1) Go to your paython package and rename "python37._pth" to python37._pth.save
2) curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
3) then run python get-pip.py
4) pip install django
Hope this help

I've solved this error downloading the executable file for python 3.7.
I've had downloaded the embeddeable version and got that error.
Now it works! :D

The method I'm going to tell might not be the correct way to do it. But this method solved my issue. I tried every solution on youtube and StackOverflow methods.
If you have two python versions installed. Delete one. I have the python 3.8.1 and 3.9.0 versions installed. I deleted version 3.9.0 from the C directory.
Now go to the control panel > System and security > System > Advanced system settings.
Click on 'environment variables'.
Select the path and click on 'edit'
Now, add the path of the python and also the path of pip module. In my case it was c:\python38 and c:\python38\scripts
This method solved my issue.

Instead of Python zip install python by python installer. It fixed the issue for me.

Failed to unpack the installation folder

I am trying to follow an Adafruit tutorial which requires installing pySerial. I am running mac 10.8 and run into this error when I try to unpack the installation folder. I go to the directory the file is placed and type:
tar -xzf pyserial-2.6.tar.gz
And then the terminal prints:
tar: Error opening archive: Failed to open 'pyserial-2.6.tar.gz'
I can't seem to find what I could be doing wrong, so any advice would be appreciated.
For those looking for the tutorial, the link can be found here: http://learn.adafruit.com/arduino-lesson-17-email-sending-movement-detector/installing-python-and-pyserial

When this error occurs. It usually means that the file cannot be found. At command line of your Terminal enter "cd downloads" and search for file pyserial-2.6.tar.gz. If the file is found, proceed by entering tar -xzf pyserial-2.6.tar.gz.

If you don't understand the terminal—or even if you do—you're going to be a lot happier using pip or easy_install than trying to do this manually. pip is better, but doesn't come built in with Apple's Python, so you'll have to install it first. Fortunately, that's pretty easy. So, let's do that:
$ sudo easy_install pip
And now:
$ sudo pip install pyserial
That will automatically download, build, and install the package for you, without you having to know anything about what directory things get downloaded to or how to run the tar command properly or anything.
And let's test it just to make sure:
$ python
Python 2.7.2 (blah blah blah … )
>>> import serial
>>> serial.VERSION
'2.6'

Installing Twitter Python Module

I am trying to install Twitter-Python and I am just not getting it. According to everything I've read this should be easy. I have read all that stuff about easy_install, python setup.py install, command lines, etc, but I just don't get it. I downloaded the "twitter-1.9.4.tar.gz", so I now have the 'twitter-1.9.4' folder in my root 'C:\Python27' and tried running
>>> python setup.py install
in IDLE... and that's not working. I was able to install a module for yahoo finance and all I had to do was put the code in my 'C:\Python27\Lib' folder.
How are these different and is there a REALLY BASIC step-by-step for installing packages?

1) Run CMD as administrator
2) Type this:
set path=%path%;C:\Python27\
3) Download python-twitter, if you haven't already did, this is the link I recommend:
https://code.google.com/p/python-twitter/
4) Download PeaZip in order to extract it:
http://peazip.org/
5) Install PeaZip, go to where you have downloaded python-twitter, right click, extract it with PeaZip.
6) Copy the link to the python-twitter folder after extraction, which should be something like this:
C:\Users\KiDo\Downloads\python-twitter-1.1.tar\dist\python-twitter-1.1
7) Go back to CMD, and type:
cd python-twitter location, or something like this:
cd C:\Users\KiDo\Downloads\python-twitter-1.1.tar\dist\python-twitter-1.1
8) Now type this in CMD:
python setup.py install
And it should work fine, to confirm it open IDLE, and type:
import twitter
Now you MAY get another error, like this:
>>> import twitter
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\twitter.py", line 37, in <module>
import requests
ImportError: No module named requests
Then you have to do kinda same steps in order to download the module requests.

Looking at the directory structure you have, I am assuming that you are using Windows. So my recommendation is to use a package manager system such as pip. pip allows you to install python packages very easily.
You can install pip here:
pip for python
Or if you want the windows specific version, there are some pre built windows binaries here:
pip for windows
Doing python setup.py install in IDLE will not work because that is an interactive python interpreter. You would want to call python from the command line to install.
with pip, you can go to the command line and run something like this:
"pip install twitter-python"
Not all python packages are found with pip but you can search using
"pip search twitter-python"
The nature of pip is that you have to type out the exact name of the module that you want.
So in a nutshell, my personal recommendation to get python packages installed is:
Install pip executable
Go to the command line
Type "pip search python_package"
Find the package you want from the list.
Type "pip install python_package"
This should install everything without a hitch.

Installing Python Modules clearly states you need to install the packages from command line, not the Python interpreter IDE (like IDLE):
For Windows, this command should be run from a command prompt window
(Start ‣ Accessories):
setup.py install
You mention the python setup.py install command, which intends calling python interpreter already and wouldn't make sense to run within interpreter.

You need to set the Windows system path variables to include c:\Python27 and C:\Python27\Scripts.
You do not need to set PYTHONPATH nor use any bat files.
Path c:\Python27 will tell Windows where python.exe is
Path c:\Python27\Scripts will tell Windows where pip is
Run pip from Windows command line (do not use Idle)

Basically, with python3.4.3, you just have to do two things to be able to use twitter:
1.python -m pip install -U pip
then once pip is updated (as it comes preinstalled). you do the second step:
2. pip install twitter
this will install twitter package.

Today, after using pre method, I could not use it again (as per my post yesterday). So I tried another way that's simple and cool and hope would work always (on my pc at least):
...Python34>cd scripts #command prompt change die where pip is
...Python34\Scripts>pip install fabric #in this dir, use pip
Awesome (for me at least) although the package I wanted could not be 'perfectly' installed, yet another pythovery.