Regular Expression IGNORECASE different for findall and split?

[Peter Otten]

Chris wrote:

>  >>> re.split('x', '1x2X3', re.I)
> ['1', '2X3']


> I expected ['1', '2', '3'] but in this case re.I bahaves exactly as not
> present at all...
 
> Is that an expected behaviour or a fault?

This is expected:

>>> help(re.split)
Help on function split in module sre:

split(pattern, string, maxsplit=0)
    Split the source string by the occurrences of the pattern,
    returning a list containing the resulting substrings.

You are setting maxsplit to

>>> re.I
2

Use re.compile() to get the desired behaviour:

>>> re.compile("x", re.I).split("1x2X3")
['1', '2', '3']

Peter