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Python Object-Oriented Python (retired) Objects Create a Class with a Method

Brent Liang
PLUS
Brent Liang
Courses Plus Student 2,944 Points
Posted by Brent Liang
Brent Liang
Courses Plus Student 2,944 Points

Bummer

The question specifies that keywords should be passed to .format() if the placeholders have names, what does it mean and what's wrong with the following code?

method.py 
class Store:
    open = 9
    close = 16

    def hours():
        return "We're open from {} to {}.".format(open,close)
evgenypanov
evgenypanov
1,521 Points

1) Don't use built-in functions name like that open() as a variable name. 2) All methods in class must have 'self' as the first argument. 3) Best way to init variables in class, use special method init. This method runs when you create instances of class every time.

Your code may be like that.

class Store:
    def __init__(self):
        self.start = 9
        self.end = 16

    def hours(self):
        return "We're open from {} to {}.".format(self.start, self.end)

c = Store()
print c.hours()
Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

:point_right: This challenge specifically asks you to use open as a variable name.

Brent Liang
Brent Liang
Courses Plus Student 2,944 Points
Brent Liang
Brent Liang
Courses Plus Student 2,944 Points

Thank you evgenypanov!!

I love your code and it definitely shows how important the "self" parameter is.

Sorry I have to give the best answer to Steven, would've chosen yours!! :)

1 Answer

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

:point_right: You forgot to include "self" as the method parameter.

You'll also need to use it as a prefix for the class variables in the format.

You might want to review the video on Class Methods.