PIL Bug with split

[ArrnaudFabre]

BPO	9383
Nosy	@ezio-melotti

^{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 2010-07-26.15:10:26.290>
created_at = <Date 2010-07-26.15:08:30.832>
labels = ['type-bug', 'invalid']
title = 'PIL Bug with split'
updated_at = <Date 2010-07-26.15:10:26.288>
user = 'https://bugs.python.org/ArrnaudFabre'

bugs.python.org fields:

activity = <Date 2010-07-26.15:10:26.288>
actor = 'ezio.melotti'
assignee = 'none'
closed = True
closed_date = <Date 2010-07-26.15:10:26.290>
closer = 'ezio.melotti'
components = []
creation = <Date 2010-07-26.15:08:30.832>
creator = 'Arrnaud.Fabre'
dependencies = []
files = []
hgrepos = []
issue_num = 9383
keywords = []
message_count = 2.0
messages = ['111630', '111633']
nosy_count = 2.0
nosy_names = ['ezio.melotti', 'Arrnaud.Fabre']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue9383'
versions = ['Python 2.7']

[ArrnaudFabre]

>>> import Image
>>> im = Image.open('whatever')
>>> im.split()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.6/dist-packages/PIL/Image.py", line 1497, in split
    if self.im.bands == 1:
AttributeError: 'NoneType' object has no attribute 'bands'

Bug can be fixed by using getdata before split() :

>>> import Image
>>> im = Image.open('whatever')
>>> im.getdata()
<ImagingCore object at 0x7fad913c0090>
>>> im.split()
(<Image.Image image mode=L size=360x480 at 0x1CAE320>, <Image.Image image mode=L size=360x480 at 0x1CAE368>, <Image.Image image mode=L size=360x480 at 0x1CAE3B0>)

[ezio-melotti]

You should report this on the PIL bug tracker. PIL is not part of the Python standard library.