What will be the output of the following Python code?def foo(): total += 1 return totaltotal = 0print(foo())
Question
What will be the output of the following Python code?def foo(): total += 1 return totaltotal = 0print(foo())
Solution
The code will raise an UnboundLocalError. This is because the variable 'total' is not defined in the local scope of the function 'foo'.
Here's a step-by-step explanation:
-
The variable 'total' is defined in the global scope and is set to 0.
-
The function 'foo' is defined. Inside this function, it tries to increment the value of 'total' by 1. However, 'total' is not defined in the local scope of 'foo'.
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When 'foo' is called in the print statement, Python looks for a local variable 'total'. It doesn't find one, so it raises an UnboundLocalError.
To fix this error, you can use the 'global' keyword to tell Python that 'total' is a global variable:
def foo():
global total
total += 1
return total
total = 0
print(foo())
This will output: 1
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