php pack ode,odepack.error：额外参数必须在tup中

我有一些问题，我的ode解算器，我试图解决一个SEIR问题，我不断得到相同的错误，我已经把我的代码基于非常相似的基础上。我的代码是：import numpy as np

from scipy.integrate import odeint

import matplotlib.pyplot as plt

# Total population, N.

N1 = 55600

# Initial number of infected and recovered individuals, I0 and R0.

I10, R10, E10 = 1, 0, 0

# Everyone else, S0, is susceptible to infection initially.

S10 = N1 - I10 - R10 - E10

# parameters

B = 0.05

a = 0.000001

d = 0.0167

g = 0.0167

z = 0.0167

M = 100000

# A grid of time points (in months)

t = np.linspace(0, 160, 160)

# The SIR model differential equations.

def deriv(y, t, N1, B, a, d, g, z, M):

S1, E1, I1, R1 = y

dS1dt = B*N1 + d*(R1) - S1/N1 * (M*a(I1))

dE1dt = S1/N1 * M*a(I1) - g * E1

dI1dt = g * E1 - z * I1

dR1dt = z * I1 - d * R1

return dS1dt, dE1dt, dI1dt, dR1dt

# Initial conditions vector

y0 = S10, E10, I10, R10

# Integrate the SIR equations over the time grid, t.

ret = odeint(deriv, y0, t, args=[N1, B, a, d, g, z, M])

S1, E1, I1, R1 = ret.T

我总是收到错误：

文件“C:/Users/Angus/PycharmProjects/firstattest/bugfinder.py“，第44行，

在

^{pr2}$

文件“C:Python36libsite packagesscipyintegrateodepack.py“，第215行，在odeint

ixpr、mxstep、mxhnil、mxordn、mxords)

odepack.error：额外参数必须在元组中

任何帮助都将不胜感激！在