Function name in Python

The __name__ attribute of a function holds the function name. Even if the function is assigned to a new variable, its name remains the name with which it was originally defined. Lambda functions have the name <lambda>

def squareIt( x ):
    return x * x
print( squareIt.__name__ ) # squareIt

foo = squareIt
print( foo.__name__ ) # squareIt

squareIt = lambda x: x * x
print( squareIt.__name__ ) # <lambda>

foo = squareIt
print( foo.__name__ ) # <lambda>

Tried with: Python 3.2