python lambda function syntax error

Question

def get_cluster_rows():
for path, rows in itertools.groupby(get_word_rows(), key=lambda x: x[0]):
    wordcounts = [(w,c) for _,w,c in rows]
    wordcounts.sort(key=lambda (w,c): -c)

    yield path, len(wordcounts), wordcounts[:50], wordcounts

SyntaxError: invalid syntax:

wordcounts.sort(key=lambda (w,c): -c)
                           ^

how to write lambda function with (w,c)?

Remove brackets

Aniket Bote
– Aniket Bote

2018-05-02 07:57:33 +00:00
Commented May 2, 2018 at 7:57 — Aniket Bote
– Aniket Bote, Commented May 2, 2018 at 7:57

stasdeep · Accepted Answer · 2018-05-02 08:01:16Z

2

You should remove brackets:

wordcounts.sort(key=lambda w, c: -c)

answered May 2, 2018 at 8:01

stasdeep

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Comments

meissner_ · Accepted Answer · 2018-05-02 08:01:54Z

1

Simply list your comma separated parameters without any brackets like:

f = lambda x,y: x+y
f(2,3)
5

answered May 2, 2018 at 8:01

meissner_

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