TypeError: object of type 'int' has no len()

Question

我已经尝试了很多方法来解决这个问题，但我找不到这个错误的答案：

TypeError: object of type 'int' has no len()

这是我的代码：

def CalculaDeltaT(Tn, Tm, Fr, T, P):
    return (Tn * Fr * T) - (P * T) - (Tm * T)

deltaT = CalculaDeltaT

def CalculaDeltaR(Rn, Fv, Rm, Mt, R):
    return (Rn * Fv * R) - (Rm * Mt * R)

deltaR = CalculaDeltaR    

def CalculaDeltaV(Vn, Vm, Mr, V):
    return (Vn * V) - (Vm * Mr * V)

deltaV = CalculaDeltaV

import matplotlib.pyplot as plt

tmax = 10
Tp = [0] * tmax

Tn = 0.2
Fr = 0.6
Tm = 0.3
P = 0.1

T = [0] * tmax

T[0] = 10

Rn = 0.4
Fv = 0.6
Rm = 0.1
Mt = 0.2

R = [0] * tmax    
R[0] = 10

Vn = 0.5
Vm = 0.8
Mr = 0.8

V = [0] * tmax    
V[0] = 10

print(len(V))
print(len(R))
print(len(T))
print(len(Tp))

for i in range (1, tmax): 
    T[i] = T[i-1] + deltaT(Tn, Fr, Tm, T[i-1], P)
    Tp[i] = i

plt.plot(Tp, T)
plt.axis(0, 10, 10, 1000)
plt.ylabel('T[Tubarões]')
plt.xlabel('Tempo[em anos]')
plt.title(r'T em função de Tempo')
plt.show()

我试过调试，但找不到问题所在。我是一名学生，所以如果这是一个基本问题，我很抱歉。

Answer 1

您收到此错误：

Traceback (most recent call last):
  File "/home/PycharmProjects/experiments.py", line 8, in <module>
    plt.axis(0, 10, 0, 100)
  File "/home/python3/lib/python3.4/site-packages/matplotlib/pyplot.py", line 1417, in axis
    v = ax.axis(*v, **kwargs)
  File "/home/python3/lib/python3.4/site-packages/matplotlib/axes/_base.py", line 1337, in axis
    if len(v) != 4:
TypeError: object of type 'int' has no len()

axis(v) 文档：

.... sets the min and max of the x and y axes, with v = [xmin, xmax, ymin, ymax]

....if len(*v)==0, you can pass in xmin, xmax, ymin, ymax as kwargs selectively to alter just those limits without changing the others.

您应该使用 plt.axis([0, 10, 0, 10]) 或 plt.axis(xmin=0, xmax=10, ymin=0, ymax=10)。

（我还调整了 ymin 和 ymax 以显示您当前的数据，因为 y 得到的值小于您设置的限制）

结果：

TypeError: object of type 'int' has no len()

TypeError: object of type 'int' has no len()

python

matplotlib

python-3.x