问题
I have recently installed the Anaconda distribution of Python. I then inserted the following line into my .bashrc file:
export PATH=/home/karnivaurus/Libraries/Anaconda/bin:$PATH
So, there are now two python binary files: one in /usr/bin/, and one in /home/karnivaurus/Libraries/Anaconda/bin.
I also have a python script, which attempts to import a module named caffe, with the line import caffe. Now, if I run python caffe from the terminal, the script runs fine. However, if I open the script in PyCharm, and set the interpreter to be /home/karnivaurus/Libraries/Anaconda/bin/python, I get the following error:
ImportError: No module named caffe
Based on all this, I have two questions....
If I run the
pythoncommand from the terminal, which binary file would it execute? The one in/usr/bin, or the one in/home/karnivaurus/Libraries/Anaconda/bin? My intuition is that it runs the first one, due to the discrepancy in behaviour with PyCharm. In that case, how can I force my system to use the Anaconda version?If I install a new package, for example
pip install caffe, then where will it be installed to? Will it be installed to/usr/local/lib/python2.7/site-packages, or to/home/karnivaurus/Libraries/Anaconda/pkgs? How can I be sure that mypythoncommand will know where to find the new package?
Thank you!
回答1:
Answer to 1:
Based on your example: export PATH=/home/karnivaurus/Libraries/Anaconda/bin:$PATH the /home/karnivaurus/Libraries/Anaconda/bin comes first, so the python from there should be the one to be executed.
But the definite answer depends on result of running: which python.
Answer to 2:
In Anaconda, use conda instead of pip to install packages. When you install using pip install caffe you'll be installing to /usr/local/lib/python2.7/site-packages.
Use conda install caffe to install to /home/karnivaurus/Libraries/Anaconda/pkgs.
Above two answers explain why even if you pip install spam package, python would say ImportError: No module named spam. Essentially you install to ordinary Python, but you attempt to import in Anaconda's python.
来源：https://stackoverflow.com/questions/33070845/conflicts-when-installing-anaconda-python