Offline installation, online installation of Python packages
Method 1: Download and install the Python package from the online website
Python installation package download website "" https://www.lfd.uci.edu/~gohlke/pythonlibs/#rpy2
(venv) D:\Python\Python_venu>pip install https://www.lfd.uci.edu/~gohlke/pythonlibs/#rpy2/rpy2‑2.9.5‑cp35‑cp35m‑win_amd64.whl --default-timeout=100
Method 2: Download the python package from the official website and install it offline
You can also use to switch to D drive, and then run pip install xxx.whl to complete the installation.
pip install C:\Users\Administrator\Desktop\test\rpy2-2.9.5-cp35-cp35m-win_amd64.whl
Python package installation on Linux
pip install rpy2.tar.gz
Method 3: Python online directly install the package on github
Package website: https://github.com/euske/pdfminer/
Example: install pdfminer
pip install git+https://github.com/farizrahman4u/pdfminer.git
Method 4: Install the package on Github offline
Find the downloaded python package on Github, and unzip the package downloaded by github . Go to the path of the offline package and perform cmd installation. Run cmd as an administrator on windows
(venv) C:\Users\Administrator\Desktop\atest\pdfminer-master\pdfminer-master>
python setup.py install