sort list of lists by first element
>>> lis = [[1,4,7],[3,6,9],[2,59,8]]
>>> sorted(lis, key=lambda x: x[0])
[[1, 4, 7], [2, 59, 8], [3, 6, 9]]
sort list of lists by first element
>>> lis = [[1,4,7],[3,6,9],[2,59,8]]
>>> sorted(lis, key=lambda x: x[0])
[[1, 4, 7], [2, 59, 8], [3, 6, 9]]
sort tuple by first element python
a = [(5,8), (3,4), (9,7)]
#sort by first element in tuple
result = sorted(a, key=lambda tup: tup[0])
#OR to do inplace sort:
a.sorted(key = lambda tup: tup[0])
# output
[(3, 4), (5, 8), (9, 7)]
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