Split and flatten a list of strings

Question

lst = [
  "Zambia",
  "Zimbabwe",
  "Suite,203,2880,Zanker,Rd,San,Jose,95134",
  "1496A,1st,and,2nd,Floor,19th,main,8th,crossSector,1,HSR,Layout,Bengaluru,560102",
]

Here I have a list of words. Some are actual words like "Zambia" and some are sentences like "Suite,203,2880,Zanker,Rd,San,Jose,95134".

How can I convert them into the below format?

lst = [
  "Zambia",
  "Zimbabwe",
  "Suite",
  "203",
  "2880",
  "Zanker",
  "Rd",
  "San",
  "Jose",
  "95134",
  "1496A",
  "1st",
  "and",
  "2nd",
  "Floor",
  "19th",
  "main",
  "8th",
  "crossSector",
  "1",
  "HSR",
  "Layout",
  "Bengaluru",
  "560102",
  "g2crowd_badge2",
  "Created with Sketch."
]

Does this answer your question? [How can I split a string inside of a list and flatten the sub-strings list?](https://stackoverflow.com/questions/41700349/how-can-i-split-a-string-inside-of-a-list-and-flatten-the-sub-strings-list) — Georgy, Dec 14 '20 at 13:24

Aaron_ab · Accepted Answer · 2019-01-17T12:17:17.067

10

try:

res = []    
for i in lst:
   res.extend(i.split(","))

Another option is to use reduce:

res = list(reduce(lambda a, b: a + b.split(','), lst, []))

edited Jan 17 '19 at 12:17

answered Jan 17 '19 at 11:17

Aaron_ab

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yatu · Answer 2 · 2019-01-17T11:25:15.160

6

You can use a list comprehension and split each string. Finally flatten the result with itertools.chain:

from itertools import chain
list(chain(*[i.split(',') for i in lst]))

['Zambia', 'Zimbabwe', 'Suite', '203', '2880', 'Zanker', 'Rd', 'San', 'Jose', 
 '95134', '1496A', '1st', 'and', '2nd', 'Floor', '19th', 'main', '8th', 
 'crossSector', '1', 'HSR', 'Layout', 'Bengaluru', '560102']

edited Jan 17 '19 at 11:25

answered Jan 17 '19 at 11:16

yatu

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score 3 · Answer 3 · answered Jan 17 '19 at 11:19

3

Given lst = your list above

flattened_list = [item for sublist in lst for item in sublist.split(",")]

Sources

answered Jan 17 '19 at 11:19

y2k-shubham

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Split and flatten a list of strings

3 Answers3