how to open txt files in python code example

Example 1: python read file line by line

with open("file.txt") as file_in:
    lines = []
    for line in file_in:
        lines.append(line)

Example 2: how to open a text file in python

f = open("demofile2.txt", "a")
f.write("Now the file has more content!")
f.close()