Histogram `bins` must increase monotonically matplotlib

问题

this is my code:

import numpy as np
import matplotlib.pyplot as plt

data = np.genfromtxt("C:\\Users\\pearl\\Downloads\\Age group.csv",
        delimiter=',',
        names=True, dtype=('U7','U40','U13',int))

x= ['15-19','20-24', '25-29','30-34','35-39','40-44']
y = data[data['birth_type'] == 'Single Birth']['total_number_of_mother']

plt.hist(x,y)
plt.show()

However, I am getting a value error saying bins must increase monotonically. May I get some help?

来源：https://stackoverflow.com/questions/65263726/histogram-bins-must-increase-monotonically-matplotlib