how to read input from file in python code example

Example 1: file input python

# import fileinput 
import fileinput 
  
# Using fileinput.input() method 
for line in fileinput.input(files ='gfg.txt'): 
    print(line)

Example 2: read and write to file python

file = open(“testfile.txt”, “r+”)

Example 3: read file from form input type filepython

>>> secure_filename('../../../../home/username/.bashrc')
'home_username_.bashrc'