Is there any way to know by which Python version the .pyc file was compiled?

解决方案

You can get the magic number of your Python as follows:

$ python -V

Python 2.6.2

# python

>>> import imp

>>> imp.get_magic().encode('hex')

'd1f20d0a'

To get the magic number for a pyc file you can do the following:

>>> f = open('test25.pyc')

>>> magic = f.read(4)

>>> magic.encode('hex')

'b3f20d0a'

>>> f = open('test26.pyc')

>>> magic = f.read(4)

>>> magic.encode('hex')

'd1f20d0a'

By comparing the magic numbers you'll know the python version that generated the pyc file.