how to open a file in pythong that has text in it and add more text code example

Example 1: python write to file

file = open(“testfile.txt”,”w”) 
 
file.write(“Hello World”) 
file.write(“This is our new text file”) 
file.write(“and this is another line.”) 
file.write(“Why? Because we can.”) 
 
file.close()

Example 2: python open and reacd file

with open('yourfile.txt','r') as f:
    lines = f.readlines()
    f.close()