Package and module instances in Python

Examples and results

1) structure of the instance and specific files:

PyPackage

 │   PyCommonM.py

 │   __init__.py

 │ 

 ├ ─ p1Package

 │       P1M.py

 │       P1MC.py

 │       __init__.py

 │ 

 └ ─ p2

       P2.py

       P2M.py

2) PyCommonM. Py

def PyCommonMF():  print "PyCommonMF"

3) P1M. Py:

def P1MF():   print 'P1MF'

4) P1MC. Py:

class P1MC(): 

  @staticmethod

  def P1MCF():  print 'P1MCF'

5) P2M. Py:

def P2MF(): print 'P2MF'

6) P2. Py:

import P2M

from PyPackage import PyCommonM

from PyPackage.p1Package import P1M

from PyPackage.p1Package.P1MC import P1MC
def P2F(): 

  print 'P2F'

  

if __name__ == '__main__':

  P2F()

  P2M.P2MF()

  P1M.P1MF()

  P1MC.P1MCF()

  PyCommonM.PyCommonMF()

7) results of running p2.py:

P2F

P2MF

P1MF

P1MCF

PyCommonMF

Second, the interpretation

*   A py file is a module, such as module: pycommonm.py, p2m.py, p1mc.py, p1m.py.
*   The folder containing s/s. Py is one package, e.g. Package: PyPackage, p1Package.
*   You can use import directly to refer to other modules in the same directory, such as import P2M in p2.py.
*   From import refers to modules in other directories belonging to a package, such as from PyPackage import PyCommonM and from pypackage. p1Package import P1M in py.py.
*   From import to refer to a class in a module, such as from pypackage.p1package.p1mc import P1MC

Note that the directory where the package resides must be in the pythonpath environment variable.