Python: Test whether a given path exists or not
Python Operating System Services: Exercise-12 with Solution
Write a Python program to test whether a given path exists or not. If the path exist find the filename and directory portion of the said path.
Python Code :
import os print("Test a path exists or not:") path = r'g:\\testpath\\a.txt' print(os.path.exists(path)) path = r'g:\\testpath\\p.txt' print(os.path.exists(path)) print("\nFile name of the path:") print(os.path.basename(path)) print("\nDir name of the path:") print(os.path.dirname(path))
Test a path exists or not: False False File name of the path: g:\\testpath\\p.txt Dir name of the path:
Python Code Editor:
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Previous: Write a Python program to iterate over a root level path and print all its sub-directories and files, also loop over specified dirs and files.
Next: Write a Python program to join one or more path components together and split a given path in directory and file.
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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())
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)
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