Can I call a one-parameter Python function without using parentheses?

Question

The Python documentation indicates that it is legal to omit parentheses if a function accepts only one parameter, but

    myfunction "Hello!"

generates a syntax error. So what is the deal?

(I am using Python 3.1)

EDIT:

The statement I read applies only to expressions :

    The parentheses can be omitted on calls with only one argument.

Answer 1

For your editing:

If you write a generator expression, for example stuff = (f(x) for x in items), you need parentheses, just as you need [ .. ]around list comprehension.

- ( , ), - - s = sum((f(x) for x in items)) ( , ), sum(f(x) for x in items)

Answer 2

iPython - -autocall ( -autocall 0, feature, -autocall 1, , -autocall 2, ).

Answer 3

functions, statements keywords (-).

fooobar.com/questions/63675/... ( ) , Python ( , 99,99% ).

Answer 4

, ... : sum (x 2 x (10)), : (operator.add, (x 2 x (10))).

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