AttributeError: module 'gzip' has no attribute 'BadGzipFile'

[rschaer]

This happens on Raspberry Pi OS with Python 3.7.3, after successful installation and installing some dependencies not listed as prerequisites. It happens both when issuing a complete scrapy command, or start.sh and following the instructions.

Traceback (most recent call last):
  File "/usr/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/__main__.py", line 4, in <module>
    execute()
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/cmdline.py", line 145, in execute
    _run_print_help(parser, _run_command, cmd, args, opts)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/cmdline.py", line 100, in _run_print_help
    func(*a, **kw)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/cmdline.py", line 153, in _run_command
    cmd.run(args, opts)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/commands/crawl.py", line 22, in run
    crawl_defer = self.crawler_process.crawl(spname, **opts.spargs)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/crawler.py", line 191, in crawl
    crawler = self.create_crawler(crawler_or_spidercls)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/crawler.py", line 224, in create_crawler
    return self._create_crawler(crawler_or_spidercls)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/crawler.py", line 229, in _create_crawler
    return Crawler(spidercls, self.settings)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/crawler.py", line 72, in __init__
    self.extensions = ExtensionManager.from_crawler(self)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/middleware.py", line 53, in from_crawler
    return cls.from_settings(crawler.settings, crawler)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/middleware.py", line 35, in from_settings
    mw = create_instance(mwcls, settings, crawler)
  File "/home/pi/.local/lib/python3.7/site-packages/scrapy/utils/misc.py", line 156, in create_instance
    instance = objcls.from_crawler(crawler, *args, **kwargs)
  File "/home/pi/feedly-link-aggregator/aggregator/extensions.py", line 184, in from_crawler
    instance = cls(crawler)
  File "/home/pi/feedly-link-aggregator/aggregator/extensions.py", line 217, in __init__
    self.state = self.load_state()
  File "/home/pi/feedly-link-aggregator/aggregator/extensions.py", line 237, in load_state
    with suppress(FileNotFoundError, EOFError, gzip.BadGzipFile):
AttributeError: module 'gzip' has no attribute 'BadGzipFile'

[tonywu7]

gzip.BadGzipFile is an exception class introduced in Python 3.8 (previously gzip raises OSError). The README has been updated to reflect this requirement.

[rschaer]

FYI, I tested it the same day on a machine with Python 3.9.5 and had the same issues.

[tonywu7]

Cannot reproduce any exception on macOS 11.4 with Python 3.8.1 or 3.9.5. What's the exact command that you ran with Python 3.9.5?

Are you sure the issue you had on 3.9.5 was the same as this AttributeError? What happens if you issue the following in the Python REPL?

import gzip
assert hasattr(gzip, 'BadGzipFile')