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File Compression in Python

Compress a text file using the gzip module.

IntermediateFile Handling ProgramsExample 18 of 20
file-compression.py
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1# Program to compress a text file using gzip
2

3import gzip
4

5src = input("Enter source text filename: ")
6dst = input("Enter destination gzip filename: ")
7

8try:
9    with open(src, "rb") as f_in, gzip.open(dst, "wb") as f_out:
10        f_out.writelines(f_in)
11    print("Compressed", src, "to", dst)
12except FileNotFoundError:
13    print("Source file not found.")

Output

Enter source text filename: notes.txt
Enter destination gzip filename: notes.txt.gz
Compressed notes.txt to notes.txt.gz

What's going on

gzip.open with 'wb' creates a gzip-compressed file; we stream bytes from the source file into it.

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