CODEWITHSUNDEEP
pythonpython-3.xif-statement
R__raki__
R__raki__

Reputation: 975

More than one if-else in single line, how to interpret them?

Well I certainly Understand if-else that are return in single line like

return 0 if x==y else 1

Which translate to 

if x==y:
    return 0
else:
    return 1

I am confused about those statements where if-else occurs multiple time in one line like

def cmp(x, y):
    return 0 if x == y else 1 if x > y else -1

How to interpret and understand if-else statements, that are written in single line.

Upvotes: 2

Views: 127

Answers (2)

Pavneet_Singh
Pavneet_Singh

Reputation: 37404

it's nested else-if ,for clarity it can be seen as this

 if x == y:
     return 0
 else:
     if x > y: 
        return 1 
     else: 
        return -1

and it would be great if the code is clear and understandable in less possible efforts

So later, what if you want to add one more case in lengthy conditional statements then it can be issue so better option is to use elif ladder like this

def _comp(total):
    if total>90:
        return 'Python lover'
    elif total>80 and total<=89:
        return 'Friend of python'
  #     elif total>50 and total<=79      added later easily
  #         return 'you like python'     added later easily
    else:
        return 'python is waiting for you'

Upvotes: 3

Leon
Leon

Reputation: 32504

Introducing parentheses makes it easier to understand.

0 if x == y else 1 if x > y else -1

must be parsed as

0 if x == y else (1 if x > y else -1)

Upvotes: 6

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