TypeError:传递给numpy.ndarray的格式字符串不受支持。_format_uuu显示列表时出错

Question

我的代码中有这个错误，我想在列表中显示迭代，但是我得到这个错误，有人知道会发生什么，任何建议，谢谢

错误

TypeError Traceback (most recent call last) in () 34 35 if i == 1: ---> 36 print ('{:^15}{:^15.6f}{:^15.6f}{:^15.6f}{:^15.6f}'.format(i-1,Ri,Rs,Rr,F(Rr))) 37 elif i > 1: 38 print ('{:^15}{:^15.6f}{:^15.6f}{:^15.6f}{:^15.6f}{:^15.10f}'.format(i-1,Ri,Rs,Rr,F(Rr),Er)) TypeError: unsupported format string passed to numpy.ndarray.format

代码

from numpy import exp 

Ri = 15
Rr = 31/2
Rs = 16
i = 0
Er = 0
Rra = 0

def F(n):
    return 745*1-exp(-x/10)-49*(x)

    #Funcion para calcular el error relativo
def error (Rra,Rrn):
    Erel = abs((Rrn - Rra) / Rrn) * 100
    return Erel

print ('{:^15}{:^15}{:^15}{:^15}{:^15}{:^15}'.format('# iter','Ri','Rs','Rr','F(Ri)','Erel(%)'))
      
while (i < 10):
    Er = error(Rra,Rr)
    Rra = Rr #Rra sera el Rr anterior para determinar el error relativo
    if F(Ri).all() * F(Rr).all() < 0:
        Rs = Rr
    elif F(Ri).all() * F(Rr).all() > 0:
        Ri = Rr
    elif F(Rr) == 0:
        print('La raiz es',Rr)

    Rr = (Ri + Rs) / 2
    i = i + 1

        #Condicional para el primer error relativo

    if i == 1:
             print ('{:^15}{:^15.6f}{:^15.6f}{:^15.6f}{:^15.6f}'.format(i-1,Ri,Rs,Rr,F(Rr)))
    elif i > 1:
             print ('{:^15}{:^15.6f}{:^15.6f}{:^15.6f}{:^15.6f}{:^15.10f}'.format(i-1,Ri,Rs,Rr,F(Rr),Er))