[Tutor] ask-why I cannot run it, and I am so confused about the traceback

[Martin A. Brown]

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Greetings,

 : class Cone:
 :    """A class for cone shapes."""
 :    def __init__(self, radius2, height):
 :        self.radius2 = radius2
 :        self.height = height
 :    def calculateArea(self):
 :        import math
 :        return (1/3.0)*(math.pi)*(self.height)*((self.radius2)**2)
 : 
 : 
 : # Create a list of volumes.
 : list = [Cube(1.1),Cube(1.2),Sphere(1.1),Sphere(1.2),Cone(1.1),Cone(1.2)]
 : 
 : # Print out the list contents.
 : for volume in list:
 :    print "The volume is: ", volume.calculateArea()
 : raw_input("\n\nPress the enter key to exit.")

 : Traceback (most recent call last):
 :  File "classVolume.py", line 30, in <module>
 :    list = [Cube(1.1),Cube(1.2),Sphere(1.1),Sphere(1.2),Cone(1.1),Cone(1.2)]
 : TypeError: __init__() takes exactly 3 arguments (2 given)

Look at your __init__ method for Cone().
Look at your invocation.

Each call to Cone only supplies a single argument.

  ... Cone(1.1),Cone(1.2) ...

- -Martin

- -- 
Martin A. Brown
http://linux-ip.net/
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