[New-bugs-announce] [issue8401] Strange behavior of bytearray slice assignment

[Eugene Kapun]

New submission from Eugene Kapun <abacabadabacaba at gmail.com>:

>>> a = bytearray()
>>> a[:] = 0 # Is it a feature?
>>> a
bytearray(b'')
>>> a[:] = 10 # If so, why not document it?
>>> a
bytearray(b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
>>> a[:] = -1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: negative count
>>> a[:] = -1000000000000000000000 # This should raise ValueError, not TypeError.
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not iterable
>>> a[:] = 1000000000000000000
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
MemoryError
>>> a[:] = 1000000000000000000000 # This should raise OverflowError, not TypeError.
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not iterable
>>> a[:] = [] # Are some empty sequences better than others?
>>> a[:] = ()
>>> a[:] = list("")
>>> a[:] = ""
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: string argument without an encoding

----------
components: Interpreter Core
messages: 103133
nosy: abacabadabacaba
severity: normal
status: open
title: Strange behavior of bytearray slice assignment
type: behavior
versions: Python 3.1

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8401>
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