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Python 101: Interactively learn how to program with Python 3

How To Read Files Piece by Piece

Explore methods to read files piece by piece in Python. Learn to use for and while loops for line-by-line and chunk reading, including handling binary files like PDFs.

We'll cover the following...

The easiest way to read a file in chunks is to use a loop. First we will learn how to read a file line by line and then we will learn how to read it a kilobyte at a time. We will use a for loop for our first example:

Python 3.5
handle = open("test.txt", "r")
for line in handle:
    print(line)
handle.close()
...