Python_ How can I tell if string a starts or ends with a string?

Case:

A file system directory has a series of files:

1.c

2.py

3.java

4.sh

5.cpp

......

Write a program that adds executable permissions to all of these. sh files and. py files

How to solve this problem?

1. Get the file in the directory first
2. Determine whether to end with a character by using the StartsWith () and EndsWith () methods, and list parsing leaves a file name that satisfies the criteria
3. Iterate lists, assigning permissions to the corresponding files

   #!/usr/bin/python3import Osimport stat# get current file under directory file_l = Os.linesdir ('. ') # StartsWith parameter must be a tuple form, only one condition is met, return truetarget_file = [name for name in file_l if Name.startswith (('. Sh ', '. Py '))]for file I n target_file:    # gives execute permission to the file owner that satisfies the condition    os.chmod (file, Os.stat (file). st_mod | Stat. S_IXUSR)

   　　

Python_ How can I tell if string a starts or ends with a string?