Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))

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Sujet : Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))
De : rob.cliffe (at) *nospam* btinternet.com (Rob Cliffe)
Groupes : comp.lang.python
Date : 10. Jun 2024, 14:29:08
Autres entêtes
Message-ID : <mailman.109.1718115170.2909.python-list@python.org>
References : 1 2
User-Agent : Mozilla Thunderbird
import itertools
def chunk1(seq):
     return [ ch * len(list(grp)) for (ch, grp) in itertools.groupby(s) ]
def chunk2(seq):
     return [ (ch, len(list(grp))) for (ch, grp) in itertools.groupby(s) ]
s='aaabbccccaa'
print(chunk1(s))
print(chunk2(s))
###################################
Program output:
['aaa', 'bb', 'cccc', 'aa']
[('a', 3), ('b', 2), ('c', 4), ('a', 2)]
Rob Cliffe
On 09/06/2024 22:20, HenHanna via Python-list wrote:
>
Chunk, ChunkC -- nice simple way(s) to write these in Python?
>
>
(Chunk  '(a a   b    a a a   b b))
    ==> ((a a) (b)  (a a a) (b b))
>
>
(Chunk  '(a a a a   b   c c   a a   d   e e e e))
    ==> ((a a a a) (b) (c c) (a a) (d) (e e e e))
>
>
(Chunk  '(2 2   foo   bar bar   j j j   k   baz baz))
    ==> ((2 2) (foo) (bar bar) (j j j) (k) (baz baz))
>
_________________
>
(ChunkC  '(a a   b b b))
     ==> ((a 2)  (b 3))
>
(ChunkC  '(a a   b      a a a   b b))
     ==> ((a 2)  (b 1)  (a 3)   (b 2))

Date Sujet#  Auteur
9 Jun 24 * in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))11HenHanna
10 Jun 24 +* Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))2MRAB
10 Jun 24 i`- Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))1HenHanna
10 Jun 24 +- Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))1<avi.e.gross
10 Jun 24 +* Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))4<avi.e.gross
10 Jun 24 i`* Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))3HenHanna
10 Jun 24 i +- Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))1<avi.e.gross
15 Jun 24 i `- Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))1B. Pym
10 Jun 24 +* Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))2Rob Cliffe
12 Jun 24 i`- Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))1HenHanna
11 Jun 24 `- Re: in Python? -- Chunk -- (ChunkC '(a a b b b)), ==> ((a 2) (b 3))1<avi.e.gross

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