Is There '?' Control Flow in Python? [duplicate]

Question

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

Answer 1

Yes, the conditional expression is available in Python 2.5+:

return n if n <= 1 else fibo(n-1) + fibo(n-2)

Answer 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.