的Python - 類型錯誤：「浮動」對象不是可調用

Question

已經得到了下面的代碼到目前爲止：

class beam(object): 

    def __init__(self, E, I, L): 
     self.E = E 
     self.I = I 
     self.L = L 
     self.Loads = [(0.0, 0.0)] #[(Force, distance along beam)] 

    def getTotalDeflection(self, x): 
     """Calculate total deflection of beam due to multiple loads""" 
     loadsList = self.Loads 
     beam.beamDeflection(loadsList, x) 

    def getSlope(self, x): 
     """Calculate gradient at a point x on beam due to deflection 
     """ 
     import scipy.misc 
     return scipy.misc.derivative(self.getTotalDeflection(x), x) 

對於函數getSlope（），我需要通過相對於尋找偏轉的衍生物計算斜率到x。不過，我收到以下錯誤：

Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "C:\Users\X\Anaconda2\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 685, in runfile 
execfile(filename, namespace) 
    File "C:\Users\X\Anaconda2\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 71, in execfile 
    exec(compile(scripttext, filename, 'exec'), glob, loc) 
    File "C:/Users/X/Downloads/beamModel.py", line 12, in <module> 
    class beam(object): 
    File "C:/Users/X/Downloads/beamModel.py", line 67, in beam 
    print b.getSlope(1.0) 
    File "C:/Users/X/Downloads/beamModel.py", line 62, in getSlope 
    return scipy.misc.derivative(self.getTotalDeflection(x), x) 
    File "C:\Users\X\Anaconda2\lib\site-packages\scipy\misc\common.py", line 258, in derivative 
    val += weights[k]*func(x0+(k-ho)*dx,*args) 
TypeError: 'float' object is not callable 

Answer 1

不要調用函數，它傳遞到scipy.misc.derivative，如

def getSlope(self, x): 
    """Calculate gradient at a point x on beam due to deflection 
    """ 
    import scipy.misc 
    return scipy.misc.derivative(self.getTotalDeflection, x)