zipfile.
How It Works
zipfile.ZipFile opens ZIP archives in read, write, append, or exclusive-create mode. Use a with block to ensure the central directory is finalized before reading the file.
Step-by-Step Example
import io
import zipfile
archive_buffer = io.BytesIO()
with zipfile.ZipFile(archive_buffer, 'w') as archive:
archive.writestr('notes/readme.txt', 'Local training notes')
with zipfile.ZipFile(io.BytesIO(archive_buffer.getvalue()), 'r') as archive:
print(archive.namelist())Understanding the Example
- The expression 'io.BytesIO()' supplies the value stored as 'archive_buffer'. This value is then used or checked by the later statements.
- The with block manages the opened resource and closes it when the block finishes, including when an exception occurs.
A successful run of this example prints the following output:
['notes/readme.txt']Where This Fits in a Real Program
A practical archive workflow has separate decisions for selection, compression, extraction and verification. When files come from other people, inspect paths, member counts and uncompressed sizes before writing anything; a successful decompression does not establish that its contents are trustworthy.
Practice: Try It Yourself
Create a ZIP archive with two short text entries and print its member names.
For this exercise, predict the result before running the changed code. Then explain the difference between the original and modified cases using the actual values, not just whether the program completed.
Further Reading
Read the official Python documentation for complete parameters, return types and exceptions.
Common Beginner Mistakes
- Forgetting to close a writable ZIP archive or storing executable configuration secrets in an exposed archive.
- Do not mistake successful decoding or parsing for trust in the contents.
Key Takeaways
- zipfile.
- zipfile.ZipFile opens ZIP archives in read, write, append, or exclusive-create mode.
- Apply the demonstrated operation to the practice input and verify its result before depending on it in a larger program.