如何在 class 中设置用户输入的值并在第二个 class 中使用它们？
How can I set values from user input in a class and use them in a second class?
我正在编写一个有 2 个选项的 python 代码。根据用户输入计算距离和面积，或根据默认点值进行计算。
对于默认点值，我让代码正常工作。尽管如此，当用户输入积分时，我无法让它工作。我目前可以很好地阅读输入，但我无法在第 2 和第 3 次使用它们 class（折线和多边形）
import math
#Point class
class Point():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#Class instantiation
p1 = Point()
p2 = Point()
p3 = Point()
val = 0
print("\n----Please select from the following options:----")
print("Enter 1 to set your point coordinates")
print("Enter 2 to use default point coordinates\n")
val = int(input("Enter your value: "))
if val == 1:
#Set point values for P1
p1_x = int(input("Enter x value for P1: "))
p1_y = int(input("Enter y value for P1: "))
#Set point values for P2
p2_x = int(input("Enter x value for P2: "))
p2_y = int(input("Enter y value for P2: "))
#Set point values for P3
p3_x = int(input("Enter x value for P3: "))
p3_y = int(input("Enter y value for P3: "))
#Set point values
p1.setXY(p1_x,p1_y)
p2.setXY(p2_x,p2_y)
p3.setXY(p3_x,p3_y)
#Print points values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
print("Location of point P2 is: (",p2.x,",",p2.y,")")
print("Location of point P3 is: (",p3.x,",",p3.y,")")
print("\n")
#Polyline class
class Polyline():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
p1 = Polyline()
p2 = Polyline()
p3 = Polyline()
#Set point values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
p1.setXY(p1.x,p1.y)
p2.setXY(p2.x,p2.y)
p3.setXY(p3.x,p3.y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = p1.getLength(p2)
resultPoint2_3 = p2.getLength(p3)
resultPoint1_3 = p1.getLength(p3)
#Print distance values
print("Length of the perimeter from P1 to P2 is: ", resultPoint1_2)
print("Length of the perimeter from P2 to P3 is: ", resultPoint2_3)
print("Length of the perimeter from P1 to P3 is: ", resultPoint1_3)
print("\n")
#Polygon class
class Polygon():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
p1 = Polygon()
p2 = Polygon()
p3 = Polygon()
#Set point values
p1.setXY(p1_x,p1_y)
p2.setXY(p2_x,p2_y)
p3.setXY(p3_x,p3_y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = p1.getLength(p2)
resultPoint2_3 = p2.getLength(p3)
resultPoint1_3 = p1.getLength(p3)
#Creating perimeter variable and setting its value according to the formula
#Perimeter formula for 3 points polygon: length1 + length2 + length3
perimeter = resultPoint1_2 + resultPoint2_3 + resultPoint1_3
#Print perimeter value
print("Perimeter of the polygon is: ", perimeter)
print("\n")
所有点的 x 和 y 值输入 3 时的当前输出：
Location of point P1 is: ( 3 , 3 )
Location of point P2 is: ( 3 , 3 )
Location of point P3 is: ( 3 , 3 )
Location of point P1 is: ( 0 , 0 )
Length of the perimeter from P1 to P2 is: 0.0
Length of the perimeter from P2 to P3 is: 0.0
Length of the perimeter from P1 to P3 is: 0.0
Perimeter of the polygon is: 0.0
如您所见，第二个和第三个 class 没有使用第一个 class 上设置的值。
您需要为点、多段线和多边形使用不同的变量。否则，当你写类似
p1.setXY(p1.x, p1.y)
这是从您尝试更新的多边形获取 p1.x 和 p1.y，而不是您之前创建的点。
在下面的代码中，p1, p2, p3 是点，pl1, pl2, pl3 是折线，pg1, pg2, pg3 是多边形。
import math
#Point class
class Point():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#Class instantiation
p1 = Point()
p2 = Point()
p3 = Point()
val = 0
print("\n----Please select from the following options:----")
print("Enter 1 to set your point coordinates")
print("Enter 2 to use default point coordinates\n")
val = int(input("Enter your value: "))
if val == 1:
#Set point values for P1
p1_x = int(input("Enter x value for P1: "))
p1_y = int(input("Enter y value for P1: "))
#Set point values for P2
p2_x = int(input("Enter x value for P2: "))
p2_y = int(input("Enter y value for P2: "))
#Set point values for P3
p3_x = int(input("Enter x value for P3: "))
p3_y = int(input("Enter y value for P3: "))
#Set point values
p1.setXY(p1_x,p1_y)
p2.setXY(p2_x,p2_y)
p3.setXY(p3_x,p3_y)
#Print points values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
print("Location of point P2 is: (",p2.x,",",p2.y,")")
print("Location of point P3 is: (",p3.x,",",p3.y,")")
print("\n")
#Polyline class
class Polyline():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
pl1 = Polyline()
pl2 = Polyline()
pl3 = Polyline()
#Set point values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
pl1.setXY(p1.x,p1.y)
pl2.setXY(p2.x,p2.y)
pl3.setXY(p3.x,p3.y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = pl1.getLength(p2)
resultPoint2_3 = pl2.getLength(p3)
resultPoint1_3 = pl1.getLength(p3)
#Print distance values
print("Length of the perimeter from P1 to P2 is: ", resultPoint1_2)
print("Length of the perimeter from P2 to P3 is: ", resultPoint2_3)
print("Length of the perimeter from P1 to P3 is: ", resultPoint1_3)
print("\n")
#Polygon class
class Polygon():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
pg1 = Polygon()
pg2 = Polygon()
pg3 = Polygon()
#Set point values
pg1.setXY(p1_x,p1_y)
pg2.setXY(p2_x,p2_y)
pg3.setXY(p3_x,p3_y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = pg1.getLength(p2)
resultPoint2_3 = pg2.getLength(p3)
resultPoint1_3 = pg1.getLength(p3)
#Creating perimeter variable and setting its value according to the formula
#Perimeter formula for 3 points polygon: length1 + length2 + length3
perimeter = resultPoint1_2 + resultPoint2_3 + resultPoint1_3
#Print perimeter value
print("Perimeter of the polygon is: ", perimeter)
print("\n")
我正在编写一个有 2 个选项的 python 代码。根据用户输入计算距离和面积，或根据默认点值进行计算。 对于默认点值，我让代码正常工作。尽管如此，当用户输入积分时，我无法让它工作。我目前可以很好地阅读输入，但我无法在第 2 和第 3 次使用它们 class（折线和多边形）
import math
#Point class
class Point():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#Class instantiation
p1 = Point()
p2 = Point()
p3 = Point()
val = 0
print("\n----Please select from the following options:----")
print("Enter 1 to set your point coordinates")
print("Enter 2 to use default point coordinates\n")
val = int(input("Enter your value: "))
if val == 1:
#Set point values for P1
p1_x = int(input("Enter x value for P1: "))
p1_y = int(input("Enter y value for P1: "))
#Set point values for P2
p2_x = int(input("Enter x value for P2: "))
p2_y = int(input("Enter y value for P2: "))
#Set point values for P3
p3_x = int(input("Enter x value for P3: "))
p3_y = int(input("Enter y value for P3: "))
#Set point values
p1.setXY(p1_x,p1_y)
p2.setXY(p2_x,p2_y)
p3.setXY(p3_x,p3_y)
#Print points values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
print("Location of point P2 is: (",p2.x,",",p2.y,")")
print("Location of point P3 is: (",p3.x,",",p3.y,")")
print("\n")
#Polyline class
class Polyline():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
p1 = Polyline()
p2 = Polyline()
p3 = Polyline()
#Set point values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
p1.setXY(p1.x,p1.y)
p2.setXY(p2.x,p2.y)
p3.setXY(p3.x,p3.y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = p1.getLength(p2)
resultPoint2_3 = p2.getLength(p3)
resultPoint1_3 = p1.getLength(p3)
#Print distance values
print("Length of the perimeter from P1 to P2 is: ", resultPoint1_2)
print("Length of the perimeter from P2 to P3 is: ", resultPoint2_3)
print("Length of the perimeter from P1 to P3 is: ", resultPoint1_3)
print("\n")
#Polygon class
class Polygon():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
p1 = Polygon()
p2 = Polygon()
p3 = Polygon()
#Set point values
p1.setXY(p1_x,p1_y)
p2.setXY(p2_x,p2_y)
p3.setXY(p3_x,p3_y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = p1.getLength(p2)
resultPoint2_3 = p2.getLength(p3)
resultPoint1_3 = p1.getLength(p3)
#Creating perimeter variable and setting its value according to the formula
#Perimeter formula for 3 points polygon: length1 + length2 + length3
perimeter = resultPoint1_2 + resultPoint2_3 + resultPoint1_3
#Print perimeter value
print("Perimeter of the polygon is: ", perimeter)
print("\n")
所有点的 x 和 y 值输入 3 时的当前输出：
Location of point P1 is: ( 3 , 3 )
Location of point P2 is: ( 3 , 3 )
Location of point P3 is: ( 3 , 3 )
Location of point P1 is: ( 0 , 0 )
Length of the perimeter from P1 to P2 is: 0.0
Length of the perimeter from P2 to P3 is: 0.0
Length of the perimeter from P1 to P3 is: 0.0
Perimeter of the polygon is: 0.0
如您所见，第二个和第三个 class 没有使用第一个 class 上设置的值。
您需要为点、多段线和多边形使用不同的变量。否则，当你写类似
p1.setXY(p1.x, p1.y)
这是从您尝试更新的多边形获取 p1.x 和 p1.y，而不是您之前创建的点。
在下面的代码中，p1, p2, p3 是点，pl1, pl2, pl3 是折线，pg1, pg2, pg3 是多边形。
import math
#Point class
class Point():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#Class instantiation
p1 = Point()
p2 = Point()
p3 = Point()
val = 0
print("\n----Please select from the following options:----")
print("Enter 1 to set your point coordinates")
print("Enter 2 to use default point coordinates\n")
val = int(input("Enter your value: "))
if val == 1:
#Set point values for P1
p1_x = int(input("Enter x value for P1: "))
p1_y = int(input("Enter y value for P1: "))
#Set point values for P2
p2_x = int(input("Enter x value for P2: "))
p2_y = int(input("Enter y value for P2: "))
#Set point values for P3
p3_x = int(input("Enter x value for P3: "))
p3_y = int(input("Enter y value for P3: "))
#Set point values
p1.setXY(p1_x,p1_y)
p2.setXY(p2_x,p2_y)
p3.setXY(p3_x,p3_y)
#Print points values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
print("Location of point P2 is: (",p2.x,",",p2.y,")")
print("Location of point P3 is: (",p3.x,",",p3.y,")")
print("\n")
#Polyline class
class Polyline():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
pl1 = Polyline()
pl2 = Polyline()
pl3 = Polyline()
#Set point values
print("Location of point P1 is: (",p1.x,",",p1.y,")")
pl1.setXY(p1.x,p1.y)
pl2.setXY(p2.x,p2.y)
pl3.setXY(p3.x,p3.y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = pl1.getLength(p2)
resultPoint2_3 = pl2.getLength(p3)
resultPoint1_3 = pl1.getLength(p3)
#Print distance values
print("Length of the perimeter from P1 to P2 is: ", resultPoint1_2)
print("Length of the perimeter from P2 to P3 is: ", resultPoint2_3)
print("Length of the perimeter from P1 to P3 is: ", resultPoint1_3)
print("\n")
#Polygon class
class Polygon():
def __init__(self):
self.x = 0
self.y = 0
def setXY(self,x,y):
self.x = x
self.y = y
#getLength() method for distance calculation
#Distance formula: root square of[(x2-x1)^2 + (y2-y1)^2]
def getLength(self, p):
return math.sqrt((self.x-p.x)**2+(self.y-p.y)**2)
#Class instantiation
pg1 = Polygon()
pg2 = Polygon()
pg3 = Polygon()
#Set point values
pg1.setXY(p1_x,p1_y)
pg2.setXY(p2_x,p2_y)
pg3.setXY(p3_x,p3_y)
#Creating variables and setting their value to their respective distance
resultPoint1_2 = pg1.getLength(p2)
resultPoint2_3 = pg2.getLength(p3)
resultPoint1_3 = pg1.getLength(p3)
#Creating perimeter variable and setting its value according to the formula
#Perimeter formula for 3 points polygon: length1 + length2 + length3
perimeter = resultPoint1_2 + resultPoint2_3 + resultPoint1_3
#Print perimeter value
print("Perimeter of the polygon is: ", perimeter)
print("\n")