How to overwrite a folder if it already exists when creating it with makedirs?

import os
import shutil

path = 'path_to_my_folder'
if not os.path.exists(path):
    os.makedirs(path)
else:
    shutil.rmtree(path)           # Removes all the subdirectories!
    os.makedirs(path)

How about that? Take a look at shutil's Python library!

os.path.exists(dir) check is recommended but can be avoided by using ignore_errors

dir = 'path_to_my_folder'
shutil.rmtree(dir, ignore_errors=True)
os.makedirs(dir)

Just say

dir = 'path_to_my_folder'
if not os.path.exists(dir): # if the directory does not exist
    os.makedirs(dir) # make the directory
else: # the directory exists
    #removes all files in a folder
    for the_file in os.listdir(dir):
        file_path = os.path.join(dir, the_file)
        try:
            if os.path.isfile(file_path):
                os.unlink(file_path) # unlink (delete) the file
        except Exception, e:
            print e

import os
import shutil

dir = 'path_to_my_folder'
if os.path.exists(dir):
    shutil.rmtree(dir)
os.makedirs(dir)