external files in python code example

Example 1: python read file

with open("file.txt", "r") as txt_file:
  return txt_file.readlines()

Example 2: python append to file

with open(filename, "a+") as f:
  f.write('Hello World')

Example 3: python open and read file with

with open('pagehead.section.htm','r') as f:
    output = f.read()

Example 4: read and write to file python

file = open(“testfile.txt”, “r+”)