read through a file 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: open text file in python

f=open("Diabetes.txt",'r')
f.read()

Example 3: python read file into a list

f = open(filename, "r")
   listItems = f.read().splitlines()