Check if a Python list item contains a string inside another string

Question

I have a list:

my_list = [\'abc-123\', \'def-456\', \'ghi-789\', \'abc-456\']

and want to search for items that contain the string \'

Answer 1

From my knowledge, a 'for' statement will always consume time.

When the list length is growing up, the execution time will also grow.

I think that, searching a substring in a string with 'is' statement is a bit faster.

In [1]: t = ["abc_%s" % number for number in range(10000)]

In [2]: %timeit any("9999" in string for string in t)
1000 loops, best of 3: 420 µs per loop

In [3]: %timeit "9999" in ",".join(t)
10000 loops, best of 3: 103 µs per loop

But, I agree that the any statement is more readable.