python调用函数怎么错_在Python中从类调用函数时参数数目错误

我试图用python编写一个遗传算法的实现。上面写着我用两个参数来调用它，而只有一个是允许的，但我肯定我不允许。在

以下是相关代码：class GA:

def __init__(self, best, pops=100, mchance=.07, ps=-1):

import random as r

self.pop = [[] for _ in range(pops)]

if ps == -1:

ps = len(best)

for x in range(len(self.pop)): #Creates array of random characters

for a in range(ps):

self.pop[x].append(str(unichr(r.randint(65,122))))

def mutate(array):

if r.random() <= mchance:

if r.randint(0,1) == 0:

self.pop[r.randint(0, pops)][r.randint(0, ps)] +=1

else:

self.pop[r.randint(0, pops)][r.randint(0, ps)] -=1

这是我初始化并从类调用时的代码：

^{pr2}$

它从IDLE返回以下错误：TypeError: mutate() takes exactly 1 argument (2 given)

我怎么能解决这个问题？在