def isBetween(a, b, c):
crossproduct = (c[1] - a[1]) * (b[0] - a[0]) - (c[0] - a[0]) * (b[1] - a[1])
if abs(crossproduct) != 0 : return False
dotproduct = (c[0] - a[0]) * (b[0] - a[0]) + (c[1] - a[1])*(b[1] - a[1])
if dotproduct < 0 : return False
squaredlengthba = (b[0] - a[0])*(b[0] - a[0]) + (b[1] - a[1])*(b[1] - a[1])
if dotproduct > squaredlengthba: return False
return True
class HouseLocation(object):
def __init__(self,street_name,x,y):
self.street_name=street_name
self.x=x
self.y=y
def print_address(self):
print '{}: {},{}'.format(self.street_name,self.x,self.y)
class Street(HouseLocation):
def __init__(self,street_name,map_symbol,street_ends):
if len(map_symbol)>1:
raise ValueError('The map_symbol should be only one letter!')
if map_symbol==str.upper(map_symbol):
raise ValueError('Make sure that the map_symbol is a small letter!')
house_locations={}
global x1,x2,y1,y2
x1=street_ends[0][0]
x2=street_ends[1][0]
y1=street_ends[0][1]
y2=street_ends[1][1]
def valid_house_to_add(self, house):
HouseLocation.__init__(house,house.street_name,house.x,house.y)
ava=isBetween((x1,y1),(x2,y2),(house.x,house.y))
return ava
def add_house(self,house):
HouseLocation.__init__(house,house.street_name,house.x,house.y)
if Street.valid_house_to_add(house)==True:
house_locations.update(house,house.x,house.y)
else:
raise ValueError("Can not add {} to map").format(house)
的代碼還沒有完成,但到目前爲止,我在最後一個函數問題add_house
當我運行在shell下面的命令:帶班類型錯誤工作:不受約束的方法
mockingbird = Street("mockingbird lane", "m", ((5,36),(30,36)))
frat_house = HouseLocation("mockingbird lane", 11, 36)
bad_house = HouseLocation("mockingbird lane", 31, 36)
mockingbird.add_house(my_house)
print mockingbird.valid_house_to_add(frat_house)
我得到以下錯誤:
if Street.valid_house_to_add(house)==True: TypeError: unbound method valid_house_to_add() must be called with Street instance as first argument (got HouseLocation instance instead)
我還是新的類,因此,如果任何人都可以指導我還是告訴我該怎麼解決這個問題會是問題真的很感激
實際上,它被要求爲'valid_house_to_add()'和'add_house'函數使用HouseLocation,我會檢查你的答案並返回 – Enigma
@Enigma:聽起來好像你的'Street'對象應該*包含*'HouseLocation'實例,而不是'HouseLocation'的子類。 –
請求:'valid_house_to_add()' - 此函數接收'HouseLocation'類型的對象作爲參數 *從另一種語言粗略翻譯 – Enigma