Code:
import glob,os
os.chdir('text_files')
for file in glob.glob('*.txt'):
print(file)
#os module
for file in os.listdir('text_files'):
if file.endswith('.txt'):
print(file)
#os.walk
for root,dirs,files in os.walk('text_files'):
for file in files:
if file.endswith('.txt'):
print(file)