how to get what type of file a file is in python

import os

# unpacking the tuple
file_name, file_extension = os.path.splitext("/Users/pankaj/abc.txt")

print(file_name)
#returns abc
print(file_extension)
#returns .txt

import os

# unpacking the tuple
file_name, file_extension = os.path.splitext("/Users/pankaj/abc.txt")

print(file_name)
#returns abc
print(file_extension)
#returns .txt