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fix:s3 handler ,cat function decode exception #821

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fix:s3 handler ,cat function decode exception #821

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6 changes: 3 additions & 3 deletions papermill/s3.py
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Original file line number Diff line number Diff line change
Expand Up @@ -282,7 +282,7 @@ def cat(
size = 0
bytes_read = 0
err = None
undecoded = ''
undecoded = b''
if key:
# try to read the file multiple times
for i in range(100):
Expand Down Expand Up @@ -317,8 +317,8 @@ def cat(

if encoding and not raw:
try:
decoded = undecoded + s.decode(encoding)
undecoded = ''
decoded = (undecoded + s).decode(encoding)
undecoded = b''
yield decoded
except UnicodeDecodeError:
undecoded += s
Expand Down