How to use python readlines method in random order

Question

How can one use the readlines() method to read a file in a random shuffled manner i.e. random.shuffle()

file = open(filename)
data = file.readlines()           
file_length =  len(data)

Answer 1

Get them into a list with lines = file.readlines(), and then random.shuffle(lines) that list (import random module).

Answer 2

You can store the entire file as a list of lines with:

f = open(filename)
data = f.read() # the whole file in one string
lines = data.split('\n')

Then use random to access lines.