Python — TypeError: format() 最多接受 2 个参数（给出 3 个）

Question

I'm taking an intro course to Python3 by SoloLearn. This is a code example they give, but when I run it in Python3 or in Python2, I get similar errors. Here's the code, on introduction to String Formatting:

nums = [4, 5, 6]
msg = "Numbers: {0} {1} {2}".
format(nums[0], nums[1], nums[2])
print(msg)

which is supposed to result in:

>>>
Numbers: 4 5 6
>>>

But I get a Syntax Error on line 2, which points to the "." at the end of the line as being an invalid use of syntax.

And I get the TypeError: format() takes at most 2 arguments (3 given) when I try to execute line 3.

Why!?

Answer 1

Lines 2 and 3 should be one line:

msg = "Numbers: {0} {1} {2}".format(nums[0], nums[1], nums[2])

If the code had that line break in the actual course, they need to get their act together. If you introduced the line break, don't do that.

Answer 2

If you want to put the format in another line, you either have to put a backslash like this:

msg = "Numbers: {0} {1} {2}".\
format(nums[0], nums[1], nums[2])

or wrap it with parenthesis, or better yet, put the format in the same line