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Inconsistent Exception for int() conversion #51959

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florentx mannequin opened this issue Jan 15, 2010 · 5 comments
Closed

Inconsistent Exception for int() conversion #51959

florentx mannequin opened this issue Jan 15, 2010 · 5 comments
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interpreter-core (Objects, Python, Grammar, and Parser dirs) type-bug An unexpected behavior, bug, or error

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@florentx
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Mannequin

florentx mannequin commented Jan 15, 2010

BPO 7710
Nosy @mdickinson, @abalkin, @ezio-melotti, @florentx

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = None
closed_at = <Date 2012-07-21.14:57:57.587>
created_at = <Date 2010-01-15.19:35:21.192>
labels = ['interpreter-core', 'type-bug']
title = 'Inconsistent Exception for int() conversion'
updated_at = <Date 2012-07-21.14:57:57.585>
user = 'https://github.com/florentx'

bugs.python.org fields:

activity = <Date 2012-07-21.14:57:57.585>
actor = 'flox'
assignee = 'none'
closed = True
closed_date = <Date 2012-07-21.14:57:57.587>
closer = 'flox'
components = ['Interpreter Core']
creation = <Date 2010-01-15.19:35:21.192>
creator = 'flox'
dependencies = []
files = []
hgrepos = []
issue_num = 7710
keywords = []
message_count = 5.0
messages = ['97839', '97841', '97842', '146594', '166037']
nosy_count = 5.0
nosy_names = ['exarkun', 'mark.dickinson', 'belopolsky', 'ezio.melotti', 'flox']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue7710'
versions = ['Python 2.7']
@florentx
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florentx mannequin commented Jan 15, 2010

On Python 3:

>>> int('\0')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'decimal' codec can't encode character '\x00' in position 0: invalid decimal Unicode string

>>> int('\01')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '\x01'

>>> int('\x80')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'utf8' codec can't decode byte 0x80 in position 0: unexpected code byte

>>> int('\xc0')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'utf8' codec can't decode byte 0xc0 in position 0: unexpected end of data

On Python 2, it raises ValueError (except for '\0').

@florentx florentx mannequin added the interpreter-core (Objects, Python, Grammar, and Parser dirs) label Jan 15, 2010
@florentx
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florentx mannequin commented Jan 15, 2010

The null byte gives UnicodeEncodeError for other conversions too.

Python 3:
int('\0'), float('\0'), complex('\0')

Python 2:
int(u'\0'), long(u'\0'), float(u'\0'), complex(u'0')

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'decimal' codec can't encode character u'\x00' in position 1: invalid decimal Unicode string

@exarkun
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exarkun mannequin commented Jan 15, 2010

Loosely related to bpo-4221.

@florentx florentx mannequin added the type-bug An unexpected behavior, bug, or error label Aug 12, 2010
@florentx
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florentx mannequin commented Oct 29, 2011

On 3.2 it is fixed (I didn't find the related changeset).

Not backported to 2.7.

@florentx
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florentx mannequin commented Jul 21, 2012

The behavior seems acceptable in 2.7 too.

>>> int('\0')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: ''
>>> int('\01')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '\x01'


>>> int(u'\0')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'decimal' codec can't encode character u'\x00' in position 0: invalid decimal Unicode string
>>> int(u'\01')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '\x01'

@florentx florentx mannequin closed this as completed Jul 21, 2012
@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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