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Created on 2019-09-19 20:31 by boris, last changed 2022-04-11 14:59 by admin. This issue is now closed.
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| msg352813 - (view) | Author: Борис Верховский (boris) * | Date: 2019-09-19 20:31 | |
pickle.load() and pickle.dump() take a file object as an argument. That file object must be opened in binary mode ("rb" or "wb"). If it's not, pickle raises a confusing error message.
When pickle.dump()'ing to a file opened in "w" mode instead of "wb" mode it'll raise a TypeError:
TypeError: write() argument must be str, not bytes
I thought it might be getting this because I was pickling bytes objects.
For pickle.load()'ing from a file opened in "r" mode instead of "rb" mode, it'll raise a UnicodeDecodeError
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 0: invalid start byte
There are a couple pages on the internet (just search "pickle" followed by either error message) with people being confused about this.
pickle should catch these errors and report something more useful.
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| msg355813 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) *  |
Date: 2019-11-01 12:18 | |
This looks like a duplicate of issue24159. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:20 | admin | set | github: 82407 |
| 2019-11-01 13:39:00 | boris | set | status: open -> closed resolution: duplicate stage: resolved |
| 2019-11-01 12:18:36 | serhiy.storchaka | set | nosy:
+ serhiy.storchaka messages: + msg355813 |
| 2019-11-01 08:19:56 | boris | set | type: enhancement |
| 2019-09-19 20:31:01 | boris | create | |