python - How to unpack a list of lists? -

this may duplicate question, want find out there way unpack list of lists , make variable unpacked result? have data in file like:

'[416213688, 422393399, 190690902, 81688],| [94925847, 61605626, 346027022],| [1035022, 1036527, 1038016]' 

so open file , make list

with open ('data.txt', "r") f:    = f.read() = a.split("|") print(*a) 

output:

[416213688, 422393399, 190690902, 81688], [94925847, 61605626, 346027022], [1035022, 1036527, 1038016]

this output need next step of program. can't make result a variable using further. gives me syntaxerror: can't use starred expression here if try:

a = (*a)  

i tried making using zip, gives me incorrect output, similar described in question zip function giving incorrect output.

<zip object @ 0x0000000001c86108> 

so there way unpack list of list , output like:

[1st list of variables], [2nd  list of variables], [etc...] 

if use itertools get:

   l = list(chain(*a))    out: ['[', '4', '1', '6', '2', '1', '3', '6'... 

that not required

so working option https://stackoverflow.com/a/46146432/8589220:

 row_strings = a.split(",| ")  grid = [[int(s) s in row[1:-1].split(", ")] row in row_strings]  print(",".join(map(str, grid))) 

here's quick , dirty way parse string two-dimensional grid (i.e.: list, contains list of integers):

row_strings = a.split(",| ") grid = [[int(s) s in row[1:-1].split(", ")] row in row_strings] print("\n".join(map(str, grid))) # out: # [416213688, 422393399, 190690902, 81688] # [94925847, 61605626, 346027022] # [1035022, 1036527, 1038016]