Recursive function Python

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want to return recursive function named find(text,substring) that will return the substring if the substring is inside the text. or return an empty string if substring is not inside the text. supposed to define a function named is_string_there(text, string) to test the find function. the function should return True if the string is inside the text or False if the string is not inside the text.

output i want to achieve:
true
false

What I have tried:

<pre>def find(text, substring):
  if substring == is_string_there: # compare them first
        return is_string_there
    else:
        return  # how do i return empty
  
def is_string_there(text, string):

      
print(is_string_there("I love DSAG", "DSAG"))
print(is_string_there("I love Python", "DSAG"))

Posted 5-Feb-20 16:53pm

fadxo20

Updated 5-Feb-20 21:25pm

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Comments

Richard MacCutchan 6-Feb-20 3:47am

Recursion makes no sense for a simple test like this.

fadxo20 6-Feb-20 4:43am

def find(text, substring):
if substring == is_string_there: # compare them first
return is_string_there
else:
return # how do i return empty

def is_string_there(text, string):
if find(text, string):
return True
else:
return False

print(is_string_there("I love DSAG", "DSAG"))
print(is_string_there("I love Python", "DSAG"))

i tried running this
but the error was
false, false. not the output that i want

1 solution

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CPallini · Answer 1 · 2020-02-05T21:25:00

The is_string_there should be something like:

Python

def is_string_there(text, string):
  if find(text, string):
    return True
  else:
    return False

and the find should be recursive, e.g.