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Python: Scan a specified directory and identify the sub directories and files

Python Operating System Services: Exercise-3 with Solution

Write a Python program to scan a specified directory and identify the sub directories and files.

Sample Solution:

Python Code :

import os
root = 'g:\\testpath\\'
for entry in os.scandir(root):
   if entry.is_dir():
       typ = 'dir'
   elif entry.is_file():
       typ = 'file'
   elif entry.is_symlink():
       typ = 'link'
   else:
       typ = 'unknown'
   print('{name} {typ}'.format(
       name=entry.name,
       typ=typ,
   ))

Sample Output:

a dir
b dir
c dir
d dir
e dir
f dir
p.txt file
q.txt file
r.docx file
s.xlsx file

Python Code Editor:

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Python: Tips of the Day

Python: Cache results with decorators

There is a great way to cache functions with decorators in Python. Caching will help save time and precious resources when there is an expensive function at hand.

Implementation is easy, just import lru_cache from functools library and decorate your function using @lru_cache.

from functools import lru_cache

@lru_cache(maxsize=None)
def fibo(a):
    if a <= 1:
        return a
    else:
        return fibo(a-1) + fibo(a-2)

for i in range(20):
    print(fibo(i), end="|")

print("\n\n", fibo.cache_info())

Output:

0|1|1|2|3|5|8|13|21|34|55|89|144|233|377|610|987|1597|2584|4181|

 CacheInfo(hits=36, misses=20, maxsize=None, currsize=20)