基础数学运算中的类型错误

Question

def dingle_plot(file,T):
    #make an array of the fields you want to have
    #invB=[]
    sdhx, main_sig=eff(file)
    rho_0=main_sig[sdhx.index(min(sdhx, key=lambda x:abs(x-0.)))]
    maxx, maxy, minx, miny=maxmin(sdhx, main_sig)
    maxfitx, maxfity=fit(maxx,maxy, 0.3,1.001, 0.001)
    minfitx, minfity=fit(minx,miny, 0.3,1.001, 0.001)
    delta_rho_rho_0=[]
    delta_rho_rho_0=dingle_dif(maxfitx, maxfity, minfitx, minfity,sdhx,delta_rho_rho_0)/rho_0
    sdhx=np.array(sdhx)
    invB= 1./sdhx
    print invB
    etha=(2*(np.pi)**2*kb*T*effm)/(hbar*e)
    y= delta_rho_rho_0*(np.sinh(etha)/etha)
    pylab.plot(invB,y)

当我调用这个函数时，它会给出一个错误：

 File "C:/Users/crosshat/Documents/SiGe/Sample Thomas/effective mass.py", line 228, in <module>
    dingle_plot(c,0.648)

  File "C:/Users/crosshat/Documents/SiGe/Sample Thomas/effective mass.py", line 210, in dingle_plot
    etha=(2*(np.pi)**2*kb*T*effm)/(hbar*e)

TypeError: unsupported operand type(s) for *: 'float' and 'file'

这里的错误是什么？你知道吗