如何将一个函数作为参数传递给其他函数？我的代码如下

Question

这是RRT算法的代码

导入系统导入pygame导入随机，数学从数学导入sqrt，atan2，cos，sin从pygame.locals导入*

RRT类（对象）：

x = 0
y = 0
X_dimension = 0
Y_dimension = 0
Window_size = 0
EPS         = 0
Max_nodes   = 0 
nodes       = list()
K_ESCAPE    = True
KEYUP       = True
QUIT        = True

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

#parameters
    self.X_dimension = 1280                                #length of the window
    self.Y_dimension = 1280                                  #breadth of the window
    self.Window_size = [self.X_dimension, self.Y_dimension]  #Window size
    self.EPS         =  7000                                #EPSILON or Incremental Distance 
    self.Max_nodes   = 100                                  #maximum number of nodes
    self.nodes       = list()
    self.QUIT        = QUIT
    self.KEYUP       = KEYUP
    self.K_ESCAPE    = K_ESCAPE


#function for calculating euclidean distance
def Calculate_Distance(self,x,y):

    x = [10,20]
    y = [15,30]  
    return sqrt((x[0]-y[0])*(x[0]-y[0])+(x[1]-y[1])*(x[1]-y[1]))

    pass 

def Initiate_Sampling(self,x,y):

    self.EPS = 7000 

    if Calculate_Distance(x,y) < 7000:
        return y
    else:
        theta = atan2(y[1]-x[1], y[0]-x[0])
        return x[0] + self.EPS*cos(theta), x[1] + self.EPS*sin(theta)

#Function for displaying the output
def Start_The_Game(self):

    pygame.init()

    screen = pygame.display.set_node(Window_size)

    caption = pygame.display.set_caption("performing RRT")

    white = 255, 240, 200
    black = 20, 20, 40
    screen.fill(black)

#Main Function
def Node_Generation(self, nodes):
    self.nodes      = []
    self.QUIT       = QUIT
    self.KEYUP      = KEYUP
    self.K_ESCAPE   = K_ESCAPE

    #nodes.append(X_dimension/2.0, Y_dimension/2.0)

    nodes.append(0.0, 0.0)
    pygame.init()

for i in range(Max_nodes):
    rand = random.random()*640.0, random.random()*480.0
    nn = nodes[0]

for p in nodes:
    if dist(p,rand) < dist(nn,rand):
        nn = p
        newnode = step_from_to(nn,rand)
        nodes.append(newnode)
        pygame.draw.line(screen,white,nn,newnode)
        pygame.display.update()
        print (i, "  ", nodes)

for j in pygame.event.get():
    if j.type == QUIT or (j.type == KEYUP and j.key == K_ESCAPE):
        pygame.quit()
        sys.exit("GAME OVER")

路径= RRT（10,15）

path.Calculate_Distance（10,15）

path.Initiate_Sampling（path.Calculate_Distance（10,15））

path.Start_The_Game（）

path.Node_Generation（）

＃

我的查询-我想将Calculate_Distance函数作为参数传递给Initiate_Sampling函数，以将其与EPS进行比较。

Answer 1

您可以通过self访问成员函数，就像访问该类中的其他类成员一样。即

self.Calculate_Distance