How can I pass an argument to a keyfunc being passed to itertools.groupby?

Question

SO!

Here is a function using itertoos.groupby:

from string import whitespace, punctuation
from itertools import groupby

def tokenize(phrase, sepcat=True):
    separators = dict.fromkeys(whitespace + punctuation, True)
    return [''.join(g) for k, g in groupby(phrase, separators.get)]

Right now, the output is as follows:

As you can see, consecutive separators are concatenated into a single string. I would like this behavior to be optional (as denoted by the sepcat parameter to my function), but this is where I hit a roadblock... How can I pass parameters to separators.get?

Can something like functools help me here?

Answer 1

use a lambda:

groupby(..., lambda x: my_normal_function(x, other, arguments))