code to demonstrate weird behavior of zipfile module

ztest.py

#!/usr/bin/env python3

import zipfile
from datetime import datetime
import random
import string

zip_file = zipfile.ZipFile("test.zip", "w", compression=zipfile.ZIP_BZIP2, compresslevel=8)

now = datetime.now()

# This will get the default mtime of 1980
with zip_file.open("file1_streamed", mode="w", force_zip64=True) as f:
    data = ''.join(random.choices(string.ascii_uppercase, k=1024))
    for _ in range(500):
        f.write(data.encode())

# This won't be compressed
zip_info = zipfile.ZipInfo("file2_streamed", now.timetuple())
with zip_file.open(zip_info, mode="w", force_zip64=True) as f:
    data = ''.join(random.choices(string.ascii_uppercase, k=1024))
    for _ in range(500):
        f.write(data.encode())

# This won't be compressed either
zip_info = zipfile.ZipInfo.from_file("/etc/os-release", "file3_disk")
with zip_file.open(zip_info, mode="w", force_zip64=True) as f:
    with open("/etc/os-release") as in_file:
        f.write(in_file.read().encode())

# Works, just for comparison
zip_file.write("/etc/os-release", "file4")

# Workaround - from_file()
zip_info = zipfile.ZipInfo.from_file("/etc/os-release", "file31_disk")
zip_info.compress_type = zip_file.compression
zip_info._compresslevel = zip_file.compresslevel
with zip_file.open(zip_info, mode="w", force_zip64=True) as f:
    with open("/etc/os-release") as in_file:
        f.write(in_file.read().encode())

# Workaround - streamed file
zip_info = zipfile.ZipInfo("file21_streamed", now.timetuple())
zip_info.compress_type = zip_file.compression
#zip_info._compresslevel = zip_file.compresslevel
with zip_file.open(zip_info, mode="w", force_zip64=True) as f:
    data = ''.join(random.choices(string.ascii_uppercase, k=1024))
    for _ in range(500):
        f.write(data.encode())

# Fix using new method so we don't have to initialize ZipInfo ourselves
#zip_info = zip_file.newinfo("file22_streamed")
#with zip_file.open(zip_info, mode="w", force_zip64=True) as f:
#    data = ''.join(random.choices(string.ascii_uppercase, k=1024))
#    for _ in range(500):
#        f.write(data.encode())

zip_file.close()