[Tutor] Use case of assignment expression

[Manprit Singh]

Dear sir ,

Consider an example to find the words from a given sentence having given
word as prefix, program should return -1 if no such words found in the
sentence.

The code is written below :

def word_found(string, wd):
    if word := [ele for ele in string.split() if ele.startswith(wd)]:
        return word
    else:
        return -1

st = "Anuj is a good boy"
wd = "goo"
ans = word_found(st, wd)
print(ans) returns ['good']  that is correct

st = "Anuj is a bad boy"
wd = "goo"
ans = word_found(st, wd)
print(ans) returns -1 that is also correct.

My question is regarding assignment expressions used in function
definition. Is this the appropriate use of assignment expression?

Need your guidance.

Regards
Manprit Singh