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Can't unpack archive that can be properly unpacked by gunzip #2
Description
It gives an error: "Stream ended in the middle of a code."
Code that reproduces bug:
filename = "igsg2260.15i.Z"
if filename.upper().endswith(".Z"):
from unlzw import unlzw
with open(filename, "rb") as file_compr:
try:
file_raw = unlzw(file_compr.read()).decode('UTF-8')
except ValueError as e:
print("unlzw: can't unpack .Z archive with error:\n'{}'".format(e))
gunzip extract file without problems.
Github doesn't allow to attach .Z files directly, so I put it in zip archive, you'll need to unpack it first.
igsg2260.15i.Z.zip
Activity
dhomeier commentedon Jan 28, 2021
Is this package still maintained?
Noticed a similar problem when trying to use
unlzwfor uncompressing binary data, and I think the problem described here astropy/astropy#10714 (comment) comes down to callingin
__init__.py, which truncates the data buffer at the first null character – changing this toworked for my examples.
EDIT: The above may not be relevant for this issue, which is a case of
unlzwreturningretcode=-3– looking at the file it seems that it might be missing an EOL/EOF; the last line of that file (uncompressed) looks incomplete. I guess that does not necessarily mean its contents cannot be unpacked, so perhaps the return value-3could be handled differently, raising just a warning or adding an option to override theValueError.