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How to create a directory if not exists? 


#!/usr/bin/python

import os
file_path = "/home/projects/filename.txt"
dir = os.path.dirname(file_path)
    if not os.path.isdir(dir) :
        os.makedirs(dir)

os.path.dirname returns the directory name of pathname path 
Ex: os.path.dirname('/home/projects/filename.txt') will returns the directory name projects
os.path.isdir returns True if path is an existing directory
The method makedirs() is recursive directory creation function. Like mkdir(), but makes all intermediate-level directories needed to contain the leaf directory.
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