How to read/choose only a part of the input in Python?

Question

I am trying to read an input which might have some information that I do not need for my program and for example I need only the part in brackets, how can I omit/eliminate that unneeded part? Just a simple example would be:

S={[2,5],[3,4],[5,6]}

So how can I omit everything and only take from the input [2,5] [3,4] and [5,6]?

Thank you!

What have you tried already? You may want to consider regex (regular expressions). — N Chauhan, Jun 07 '19 at 21:58
I tried reading the whole input as a string and sort only the parts that I need. — bizzy, Jun 07 '19 at 22:05

score 0 · Answer 1 · answered Jun 07 '19 at 22:02

0

Suppose your string is that:

S="{[2,5],[3,4],[5,6]}"

print(S[S.find("{")+1:S.find("}")])

will return the substring inside the parenthesis '[2,5],[3,4],[5,6]'

Considering other options, I based my answer in the accepted one here

answered Jun 07 '19 at 22:02

developer_hatch

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score 0 · Answer 2 · answered Jun 08 '19 at 10:00

assuming you data to be a string and similar to S={[2,5],[3,4],[5,6]} the noticeable thing is the { and } are in the position 0 and n-1 of the string ,n being the length of string you may use

 S={[2,5],[3,4],[5,6]}
print(S[1:-1])

where S[:] refer S[to begin with :to end ] as we want to omit data at pos 0 we begin with 1 and the last element '}' we use [1:-1] where -1 refers to last position similarly -2 will be second last and so on

How to read/choose only a part of the input in Python?

2 Answers2