python - 代码与前面的行相同，但给出了错误？

Question

我不断得到

TypeError: 'int' object is not subscriptable

在我的evenly()函数中。如果我注释掉均匀函数， equall() 和 gauss() 工作得很好，我所做的就是从它们复制代码并使用我的 stepe() 函数而不是 step() 或 stepn()

import numpy as np
import matplotlib.pyplot as plt
from numpy.random import rand,seed,randn

steps = 1
walks = 10000

walk = np.zeros(steps + 1)

def step():
    if rand() < 0.5:
        return 1.0
    return -1.0

def stepn():
    return randn() + 0.5

def stepe():
    return (6*(rand()-0.5))

def equall(walks,steps):
    l = []
    for w in range(walks):
        for s in range(steps):
            walk[s+1] = walk[s] + step()
        l.append(walk[steps])
    return l

def gauss(walks,steps):
    l = []
    for w in range(walks):
        for s in range(steps):
            walk[s+1] = walk[s] + stepn()
        l.append(walk[steps])
    return l

def evenly(walk,steps):
    l = []
    for w in range(walks):
        for s in range(steps):
            walk[s+1] = walk[s] + stepn()
        l.append(walk[steps])
    return l

plt.figure(figsize=(10,7))
plt.hist(equall(walks,steps),bins=15)
plt.show()
plt.hist(gauss(walks,steps),bins=15)
plt.show()
plt.hist(evenly(walks,steps),bins=15)
plt.show()

Answer 1

def evenly(walk,steps):

此处参数 walk(而不是 walks)屏蔽同名的外部变量，并为后续语句定义 walk[s+1] = walk [s] + stepn() 。我想应该是散步