即使安装后也没有名为numpy的模块

Question

I am using numpy in a python file. I am trying to execut this file on a remote linux server. I have installed pip and numpy without being root as mentioned in this post: https://gist.github.com/saurabhshri/46e4069164b87a708b39d947e4527298

Despite the fact that pip and numpy were both installed successfully I still get :

import numpy

 ModuleNotFoundError: No module named 'numpy'

I have tried to create a virtual environment but when doing that I get:

File "/usr/local/bin/pip", line 7, in <module>
    from pip import main
ImportError: cannot import name main 

ps: when I type ./pip list this is the main stuff I get:

numpy              1.16.3 
pip                19.1.1

and I have both: Python 2.7.15rc1 and Python 3.6.7

Answer 1

You should check if you installed NumPy for Python version you actually try to use. The easiest way is to list two directories:

• ls -la ~/.local/lib/python2.7/site-packages/
• ls -la ~/.local/lib/python3.5/site-packages/

and check if there are NumPy files (directories may differ due to your version of Python). If there are none, you may want to install them:

Python 2.x:

1. wget https://bootstrap.pypa.io/get-pip.py
2. python get-pip.py --user
3. echo "PATH=\\$PATH:~/.local/bin" >> ~/.bashrc
4. source ~/.bashrc
5. pip install numpy --user

Python 3.x:

1. wget https://bootstrap.pypa.io/get-pip.py
2. python3 get-pip.py --user
3. echo "PATH=\\$PATH:~/.local/bin" >> ~/.bashrc
4. source ~/.bashrc
5. pip3 install numpy --user

Answer 2

the 3rd command should be :

echo "export PATH=~/.local/bin:$PATH" >> ~/.bashrc

bash should use pip from ~/.local/bin, not from /usr/local/bin. So I placed .local before every other entry in the path.