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Possible Duplicate:
Python Ternary Operator
Is there control flow operator similar to '?' of C/C++ in python?
If there is a chunk of code similar to this:
return n <= 1 ? n : fibo(n-1) + fibo(n-2)
Will got an error like this:
File "fibonacci.py", line 2
return n <= 1 ? n : fibo(n-1) + fibo(n-2)
^
SyntaxError: invalid syntax
293
A statement that controls the flow of execution depending on some condition. In Python the keywords if , elif , and else are used for conditional statements.
Python “not in” operator It also checks the presence of a specified value inside a given sequence but it's return values are totally opposite to that of the in operator. When used in a condition with the specified value present inside the sequence, the statement returns False . Whereas when it is not, we get a True .
Yes, the conditional expression is available in Python 2.5+:
return n if n <= 1 else fibo(n-1) + fibo(n-2)
You can try this short circuit expression return n > 1 and fibo(n-1) + fibo(n-2) or n. While this is not the ternary statement, it is concise and does the job in this scenario.
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