How to check a part of an input | Python

Question

I want to check a specific part of an input but I don't know "where" it is

I tried with this: a = input('Enter command')

if a[0:5] == '(Command name)':

    if a[7:?] == '(Subject)':

        if a[?:len(a)] == '(Choice)':

            To be continued

So, the input is divided into three parts; The command, the subject, and which type of the command it will run. But which index should the ? be? I don't know the length of the word. Is it impossible?

No, I know that I can make it, just not how.

If you need more complicated parsing, try checking out `argparse`. — Captain Trojan, Jun 15 '21 at 17:39
Or did you want to find out [how to split strings on whitespace](https://stackoverflow.com/questions/8113782/split-string-on-whitespace-in-python)? — Pranav Hosangadi, Jun 15 '21 at 17:44

Alex028502 · Answer 1 · 2021-07-14T17:45:05.867

0

If they are always one word, maybe something like this will work:

terms = a.strip().split(" ")
command_name = terms[0]
subject = terms[1]
choice = terms[2]

if there is a possibility of double spaces, it needs to be more clever

the above is the same as

command_name, subject, choice = a.strip().split(" ")

edited Jul 14 '21 at 17:45

answered Jun 15 '21 at 17:45

Alex028502

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Wow, you really gets your answer fast. Thanks – CurseOfSmartness Jun 15 '21 at 17:57
1

Btw do you mean `command_name = terms[0]`? – CurseOfSmartness Jul 14 '21 at 17:21
oh yeah - fixed now – Alex028502 Jul 14 '21 at 17:46

score 0 · Answer 2 · answered Jun 15 '21 at 17:48

I suppose your input should go something like this:

command subject choice

So there are basically three parts(might be more). I suggest you break the input in list as:

a = [str(x) for x in input().split()]

To get the length of each entities:

len(entity)

And for index you can use index():

list.index(entity)

How to check a part of an input | Python

2 Answers2