How to use the py7zr.is_7zfile function in py7zr
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miurahr / aqtinstall / aqt / installer.py View on Github 
if r.status_code == 302:
newurl = altlink(r.url)
# newurl = r.headers['Location']
self.logger.info('Redirected to new URL: {}'.format(newurl))
r = requests.get(newurl, stream=True)
except requests.exceptions.ConnectionError as e:
self.logger.warning("Caught download error: %s" % e.args)
return False
else:
with open(archive, 'wb') as fd:
for chunk in r.iter_content(chunk_size=8196):
fd.write(chunk)
self.logger.info("-Extracting {}...".format(archive))
if sys.version_info > (3, 5):
if not py7zr.is_7zfile(archive):
raise BadPackageFile
if command is None:
py7zr.SevenZipFile(archive).extractall(path=path)
else:
if path is not None:
run([command, 'x', '-aoa', '-bd', '-y', '-o{}'.format(path), archive])
else:
run([command, 'x', '-aoa', '-bd', '-y', archive])
os.unlink(archive)
return True
