Homework

#

# Use the os$.$listdir function to retrieve a list

# of files and display them on the screen with

# a for loop.

#

# Then, with another for loop, display only the

# $.$py files, if any.

#

# $($If there are no files in your current working

# directory so nothing shows in your output, modify

# your code $...$ use chdir near the at the beginning

# of the script to change into a directory that

# does have files.$)$