python中的继承：“super（）至少需要1个参数（给定0）”

Inheritance in python: “super() takes at least 1 argument (0 given)”

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import math

class Rocket(object):

def __init__(self, x=0, y=0):
self.x = x
self.y = y

def move_up(self):
self.y += 1

def move_rocket(self, x_inc=0, y_inc=1):
"""move rocket by default move in upward direction by 1
"""
self.x += x_inc
self.y += y_inc

def get_distance(self, other_Rocket):
"""calculates distance between current and other rocket
"""
return(math.sqrt(((self.x - other_Rocket.x)**2) + (self.y - other_Rocket.y)**2))

class SpaceShuttle(Rocket):

def __init__(self, x=0, y=0, flights_completed=0):
super().__init__(x, y)
self.flights_completed = flights_completed

shuttle=SpaceShuttle(2, 3, 10)

print(shuttle)

在上面的代码中，派生类给出了以下错误：

Traceback (most recent call last):
File"/home/sumeedha/PycharmProjects/Basics/classes.py", line 50, in shuttle=SpaceShuttle(2,3,10)
File"/home/sumeedha/PycharmProjects/Basics/classes.py", line 21, in init
super().init(x, y)
TypeError: super() takes at least 1 argument (0 given)

您运行的是python 2，而super()的第一个参数type并不像python 3那样是可选的。https://docs.python.org/2.7/library/functions.html超级

您需要这样给super()打电话：

1	super(SpaceShuttle, self).__init__(x, y)