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I am using Python 3.4 with PyCharm IDE. Some of the external libraries have been released for this version of Python. But most might not be presented yet, just like matplotlib. I have you use this library. How can I use matlibplot for Python 3.3 in Python 3.4? Must I migrate again to python 3.3?!

Thank you

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  • many of python packages support in that major version. means when a package works in python3 most of the time it supports all of python3 versions. Commented Jun 18, 2014 at 7:40
  • What happens when you try to run Matplotlib? Does it look like a simple error that we could fix? Commented Jun 18, 2014 at 7:41
  • @jforberg: Actually, there is no error generated by IDE compiler. I've just imported matplotlib 3.3 into my 3.4-driven project. As I call the older functions, I got neither the valid result nor any error! Commented Jun 18, 2014 at 7:44

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If the library is pure Python then any code that runs in Python 3.3 should also run in Python 3.4.

If the library contains Python byte code (pyc) then there is no guarantee of compatibility. You have to recompile the Python code.

if the library contains c code (pyd) then you have no guarantee of Python C API compatibility unless the library made some specific switches for it. You would have to recompile the C code.

Matplotlib falls into the latter categories. However there are version of matplotlib compiled against Python 3.4 (for Windows). Or you have to go back to Python 3.3.

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As I think I've been encountering with pyc case probably, Would you please letting me know about the recompiling procedure?
@matinking You just delete them all. They are created automatically from the corresponding py files which must be there of course. Or you use compile all.