Python: Custom Module Add path

Write yourself a Pyhton module each time in use to load their own modules are said that the module does not exist, and then found themselves on the Internet a total of three methods, have tried.

1:import SYS

Sys.path.append ("Add your Own module path"),//This method I want to vomit the trough is very troublesome, each time must add again, has been enough.

2: Add environment variables//This is also not recommended, after all, each time their own modules are not in the same directory.

3: Locate the site-packages in the Python installation path, such as ' E:\pythonfile\Lib\site-packages ', and create a new file with the suffix. PTH, for example Newpk.pth. Then notepad to open the file inside add their own definition of the module path, casually add, is not very convenient?

Python: Custom Module Add path