How to install a package with pip locally? - python

Hello I've installed a local version of pip using
python get-pip.py --user
After that I can't find the path of pip, so I run:
python -m pip install --user Cython
Finally I can't import Cython
import Cython
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named 'Cython'

Use virtualenv, it is used to create isolated python environments (check this quick guide http://docs.python-guide.org/en/latest/dev/virtualenvs/ )

python -m pip install --user Cython
should probabably be
pip install --user cython

Related

Cannot import pip installed package as non-root user

Unable to import a python module as a non root that was installed as root.
I have installed flask_babelex package in both ways:
pip3 install --user flask_babelex
pip3 install flask_babelex
and working fine when I try to import:
[root#dev-apache ~]# python3 -c "import flask_babelex"
It's not working if were I run as a non-root user:
[root#dev-apache ~]# su - apache
-bash-4.2$
-bash-4.2$ python3 -c "import flask_babelex"
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'flask_babelex'
I tried by changing permission to site-packages but no use:
/usr/local/lib/python3.6/site-packages
any workaround suggestions?
You can ensure you're installing the package with the correct python environment by running
python3 -m pip install flask_babelex
This will install the package specifically in the environment that your python3 is using

Pipenv "ModuleNotFoundError: No module named 'pip'" after upgrading to python3.7

I am using ubuntu 18. The default python3 version is 3.6. I updated to 3.7 today and update the alternatives to point to python3.7.
I can use python3.7 by typing python3. I can also use pip3 --version (20.0.2).
I can activate the virtual environment by using pipenv shell. But I cannot install package using pipenv install . It gives me the following error:
pipenv.exceptions.InstallError]: ['Traceback (most recent call last):', ' File "/home/johnchan/.local/share/virtualenvs/src-lkQYyAWf/bin/pip", line 5, in <module>', ' from p
ip._internal.cli.main import main', "ModuleNotFoundError: No module named 'pip'"]
ERROR: ERROR: Package installation failed...
Running which pip3: /usr/local/bin/pip3
Running which pipenv: /usr/local/bin/pipenv
Type pip3 inside pipenv gives:
Traceback (most recent call last):
File "/home/johnchan/.local/share/virtualenvs/src-lkQYyAWf/bin/pip3", line 5, in <module>
from pip._internal.cli.main import main
ModuleNotFoundError: No module named 'pip'
python2 -m pip install --user --upgrade pip
python3 -m pip install --user --upgrade pip
After upgrading pip (or pip3, in this case) if the following occurs:
$ ~ pip3 -V
Traceback (most recent call last):
File "/usr/local/bin/pip", line 7, in <module>
from pip._internal import main
ModuleNotFoundError: No module named 'pip._internal'
Force a reinstall of pip:
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python3 get-pip.py --force-reinstall
Verify install:
$ ~ pip3 -V
pip 10.0.1 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)
Now pip3 install <package> and pip3 install --user <package> (for user-level installs) will work correctly.
There should never, ever be any reason you need to run pip in elevated mode.
(note: For Python 2.7, just replace python for python3, and pip for pip3)
Had the same issue on macOS as well, it's a common issue across platforms.
I found the answer here:
Setting up a virtualenv: No module named 'pip'
Seems like it is a bug.
I install pipenv using --re flag which is equivalent to virtualenv venv --no-setuptools.
Then I run python get-pip.py inside pipenv.
It works. I can install package now.
But I don't know the reason why...

Python3.6 ImportError: cannot import name 'main' after upgrading pip from 8.1.1 to 19.0.1

After I upgraded pip from 8.1.1 to 19.0.1 by running
pip install --upgrade pip
I tried to test the version of pip by running
pip -V
But I got the following error
Traceback (most recent call last):
File "/usr/bin/pip3", line 9, in <module>
from pip import main
ImportError: cannot import name 'main'
I set the python3 and pip3 to be default by putting the following in ~/.bashrc
alias python=python3
alias pip=pip3
My system is ubuntu 16.04
This is a common issue as referenced here : https://github.com/pypa/pip/issues/5221
You are trying to use the pip, which is shipped with the Debian system. You better try to avoid using that pip at any cost.
Please use python3 -m pip install package instead of the system pip which you have in the debian system.
I also recommend using venv - virtual environments for keeping your system environment safe.

Some issues with pip installation

I tried to install pip manager using the file get-pip.py as mentioned in the documentation- https://pip.pypa.io/en/stable/installing/
So, I downloaded the file and ran python get-pip.py and as a result, I had permission issues. So I again ran sudo python get-pip.py and it worked.
Now I wanted to install numpy. So I ran pip install numpy and it showed me the Import Error saying-
Traceback (most recent call last):
File "/usr/local/bin/pip", line 7, in <module>
from pip import main
ImportError: No module named pip
But again when I ran sudo pip install numpy, it worked and got installed. Now, for every python script involving these pip packages, I have to run the script using sudo which I don't like. So how can I resolve these permission issues?
Just to mention-
python v2.7.12
pip v9.0.1
pip installation location- /usr/local/lib/python2.7/dist-packages

Problems Installing pip on CentOS 5.x

I have pip installed:
[amr#h2oamr kits]$ python get-pip.py
Requirement already up-to-date: pip in /usr/local/lib/python2.7/site-packages
However, I'm getting this error when trying to install Django:
[amr#h2oamr kits]$ pip install django
Traceback (most recent call last):
File "/usr/local/bin/pip", line 7, in ?
from pip import main
ImportError: No module named pip
I am stuck trying to move forward. I installed pip as recommended by using a get-pip.py module I downloaded.
This upgrade also did not work.
[amr#h2oamr kits]$ pip install --upgrade pip
Traceback (most recent call last):
File "/usr/local/bin/pip", line 7, in ?
from pip import main
ImportError: No module named pip
How can I remove pip altogether, and then re-install it?
you can use the command $ rm pip to remove pip and then $sudo apt-get install pip to get the latest version

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