“班级”任务（初学者）需要的指导

Question

看起来令人望而生畏，但请耐心等待，这并不像看起来那么困难。我在这里有一个关于光束偏转的代码。这只是一些数学和数字。只有最后一部分需要注意。

class beam(object): 
"""This class is models the deflection of a simply supported beam under 
multiple point loads, following Euler-Bernoulli theory and the principle of 
superposition. 
""" 

    def __init__(self, E, I, L): 
     """The class costructor. 
     """ 
     self.E = 8.0E9 # Young's modulus of the beam in N/m^2 
     self.I = 1.333E-4 # Second moment of area of the beam in m^4 
     self.L = 5.0 # Length of the beam in m 
     self.Loads = [(0.0, 0.0)] # the list of loads applied to the beam 
     self.name = "beam" 

    def setLoads(self, Loads): 
     '''This function allows multiple point loads to be applied to the beam 
     using a list of tuples of the form (load, position) 
     ''' 
     self.Loads = Loads 

给出了“def __ init __”和“def setLoads”，所以上面不需要改变。我输入self.E，I和L的值，因为我认为我需要它们，但这些数字可以替换回它们以前的字母。

def beamDeflection(self, Load, x): 
     """Just a simple calculation, really. 
     """ 
     E = 8.09 * (10 ** 9) 
     I = 1.333 * (10 ** -4) 
     L = 5 
     a = 2.5 
     b = a + (x - a) 
     (P1, a) = Load 
     if 0 <= x <= 2.5: 
      beamDeflection = ((P1*b*x)/(6*L*E*I))*((L**2)-(x**2)-(b**2)) 
     else: 
      if 2.5 < x <= 5: 
       beamDeflection = ((P1*b)/(6*L*E*I))/(((L/b)*((x-a)**3)) - 
                 (x**3) + (x*((L**2) - 
                   (b**2)))) 
     return beamDeflection 

上述“beamDeflection”是简单的代码我输入了，仅仅使用一个已经被赋予了式计算在光束偏转。从本质上讲，如果一个重物放在横梁的左侧，它会计算出一个数字，而另一侧则相同。

def getTotalDeflection(self, x): 
     """The function getTotalDeflection(self, x) should go through each load tuple in the 
     list.Loads and calculate the beam deflection at point x (Hint: the function you just 
     created could be handy here!). getTotalDeflection should return the total deflection at x, 
     which is the sum over each of the individual deflections. 
     """ 

我的理解是，我需要一个“for”循环都要经过每个负载元组同时累及self.load。我不确定如何将这两件事结合在一起。如果有人能帮助我，我真的很感激。

Answer 1

你要找的大概是这样的（否则请说明）：

def getTotalDeflection(self, x): 
    return sum(self.beamDeflection(loadval, x) for loadval in self.Loads) 

Answer 2

我想这是你想要什么：

def getTotalDeflection(self, x): 
    total = 0 
    # For every load in `Loads` 
    for load in self.Loads: 
    # Compute the deflection and add it to the total 
    total += self.beamDeflection(load, x): 
    return total