Descobre o maior caminho no sistema operacional

longpatth.py

import os

sizepath = 0;
longpath = None;

def calc(path):
    global longpath
    global sizepath
    length = len(path)
    if length > sizepath:
        sizepath = length
        longpath = path

def walk(path):

    for dirname, dirnames, filenames in os.walk(path):
        for subdirname in dirnames:
            calc(os.path.join(dirname, subdirname))

        for filename in filenames:
            calc(os.path.join(dirname, filename))


walkin = "C:\\"
walk(walkin)

print "O caminho maior encontrado foi de %s caracteres" % sizepath
print "O caminho : %s" % longpath