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Read Binary File in Python

Read bytes from a binary file and print their length.

BeginnerFile Handling ProgramsExample 10 of 20
read-binary-file.py
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1# Program to read a binary file
2

3filename = input("Enter binary filename: ")
4

5try:
6    with open(filename, "rb") as f:
7        data = f.read()
8        print("Read", len(data), "bytes")
9except FileNotFoundError:
10    print("Binary file not found.")

Output

Enter binary filename: image.png
Read 10240 bytes

What's going on

Opening in "rb" mode reads raw bytes rather than decoding text.

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