Develop Reference

How do I upgrade from pip 1.0?

I was trying to install a package which required an older version of pip and (stupidly) thought it would be a good idea to try installing the oldest version of pip possible (1.0).
To clarify, it is not pip 1.0.1 (which most guides I found on the internet refer to), but pip 1.0
When I attempt to run 'python -m pip install --upgrade pip', I get the following error:
C:\mydirectory\venv\Scripts\python.exe: No module named pip.__main__; 'pip' is a package and cannot be directly executed
When I run 'pip --version', I get the following info:
pip 1.0 from c:\mydirectory\venv\lib\site-packages (python 3.7)
Is there any way I can upgrade pip from this point?

python -m pip install -U pip should work. That is how I do it.

Try this:
python3 -m pip install pip

pip freeze gives different version from pip --version

I am on Windows 10 and just installed Python 3.7.4. I installed virtualenv using pip install virtualenv, and i got the message that i installed 16.7.2 while 19.2.1 is available. I then used python -m pip install --upgrade pip to upgrade.
Here is the issue: when i type pip freeze on Powershell, i am getting this:
virtualenv==16.7.2
but when i type pip --version, i am getting this:
pip 19.2.1 from c:\users\user1\python\lib\site-packages\pip (python 3.7)
Can you please let me know why pip freeze still shows the old version?
Thanks.

pip and virtualenv are 2 different cases where pip is mainly used for installing python packages and virtualenv for utilizing virtual environments while development.
The following command updates only pip not virtual env
python -m pip install --upgrade pip
If you think you still need to upgrade virtualenv (of course if a new version is available). Please follow the following syntax without specifying a version.
pip install [package] --upgrade

Upgrading pip for different versions of python

I have two versions of python installed on my computer (3.6 and 3.7). Just upgraded pip to the latest version (19.0.1) using the command python -m pip install --upgrade pip however i think it only upgraded the pip for python version 3.6. When attempting to install a package specifically for python version 3.7 with the following command pip3.7 install scipy i got the message saying You are using pip version 18.1, however version 19.0.1 is available. Clearly only the pip for version 3.6 was upgraded. I cannot figure out a command to upgrade 3.7 pip as well. I tried the following:
python -m pip3.7 install --upgrade pip
This did not work (Trying to use the logic of how packages are handled for different versions of python). Could not find a question that addressed this specific issue. Any help would be greatly appreciated.

Use the python 3.7 interpreter to run the command:
python3.7 -m pip install --upgrade pip
Or use the pip3.7 binary directly:
pip3.7 install --upgrade pip

export LD_LIBRARY_PATH=/usr/lib64
activate pip3

I ran into the same problem. If you have Microsoft Visual also installed the best command to use is
py -m pip install --upgrade pip --user
I used that command, and it worked like a charm.

inconsistent pip version in PyCharm

I'm using PyCharm on Windows. I have a project setup for small experiments with algorithms that uses it's own virtual environment. I was trying to install tensorflow and I got an error that I'm running pip 10.0.1 and should upgrade to 18.1, which I did through "File/Settings/Project Interpreter". It now says 18.1. But I'm still getting warnings about using version 10.0.1.
(venv) C:\users\xxx\pycharmprojects\so> pip list
...
pip 10.0.1
You are using pip version 10.0.1, however version 18.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
(venv) C:\users\xxx\pycharmprojects\so>python -m pip install --upgrade pip
Requirement already up-to-date: pip in c:\users\xxx\pycharmprojects\so\venv\lib\site-packages (18.1)
(venv) C:\users\xxx\pycharmprojects\so> pip list
...
pip 10.0.1
You are using pip version 10.0.1, however version 18.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.
(venv) C:\users\xxx\pycharmprojects\so>python -m pip list
...
pip 18.1

After a bit of discussion, we've got the problem solved.
Here's what was wrong:
PyCharm is unable to properly update pip under Windows while using virtualenv (possible bug/issue)
The reason why installation of Tensorflow was failing at first place was that it strictly requires Python3.5 under Windows, while the problem occured with Python3.7, so switching to Python3.5 VirtualEnv in PyCharm solved the issue.
NOTE: No pip update was required in order to install Tensroflow with Pycharm + Python3.5 venv

It has happened to me after upgrading to Python 3.7.1 and pip 19.0.3.
It was solved after making sure that both new Python installation folder and corresponding Scripts folder are included in the PATH environment variable prior to creating a new virtual environment for my project.

How to downgrade the installed version of 'pip' on windows?

On a windows 7 machine I have pip version 1.5.6 installed:
pip 1.5.6 from C:\Users\dietz\PNC\tas\ENV\lib\site-packages (python 2.7)
In order to find the reason for an error I want to install a different version of pip, which worked fine for me. So how can I uninstall pip and install version 1.2.1 instead?

pip itself is just a normal python package. Thus you can install pip with pip.
Of cource, you don't want to affect the system's pip, install it inside a virtualenv.
pip install pip==1.2.1

If downgrading from pip version 10 because of PyCharm manage.py or other python errors:
python -m pip install pip==9.0.1

If you want to upgrade or downgrade to different version of pip, better use --upgrade option at one go instead doing it in two steps. i.e. first uninstalling the existing and then re-installing to new version, below does both in one go as shown below.
USE: Executed on WIN10 with Bash
python -m pip install --upgrade pip==19.2.3
$ python -m pip install --upgrade pip==19.2.3
Collecting pip==19.2.3
Using cached pip-19.2.3-py2.py3-none-any.whl (1.4 MB)
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 21.3.1
Uninstalling pip-21.3.1:
Successfully uninstalled pip-21.3.1
Successfully installed pip-19.2.3

well the only thing that will work is
python -m pip install pip==
you can and should run it under IDE terminal (mine was pycharm)

If you have to downgrade pip version do following steps:
step1. pip uninstall pip
step2. pip install pip==version number you want to install or downgrade
step3. check version of pip using pip --version
This process also works when any other package giving error exit code(2) you can follow these steps and install your package.