python for file in dir code example

Example 1: how to search for a specific file extension with python

import glob, os
os.chdir("/mydir")
for file in glob.glob("*.txt"):
    print(file)

Example 2: python loop opening file from directory

basepath = "pathtodir/DataFiles/"
for filename in os.listdir(basepath):
    if filename.endswith(".log"): 
        print(os.path.join("./DataFiles", filename))

        with open(basepath + filename) as openfile:    
            for line in openfile:
            ........