Why do 2 histograms overlap in matplotlib?

Question

In this python script is an attempt to create two histogram in one figure but the second histogram overlaps the first one

from random import randrange
import matplotlib.pyplot as plt

fig = plt.figure(figsize=(50,50))
ids =  [str(randrange(10000, 99999)) for i in range(1000)]
ids2 = [str(randrange(10000, 99999)) for i in range(1000)]
def fun1():
    ax = fig.add_subplot(1, 1, 1)
    n, bins, patches = ax.hist(x=ids, bins=range(500))
    ax.grid(axis='y', alpha=0.6)
    fig.tight_layout(pad=3.0, w_pad=2.0, h_pad=2.0)

def fun2():
    ax2 = fig.add_subplot(2, 1, 2)
    n, bins, patches = ax2.hist(x=ids2, bins=range(500))
    ax2.grid(axis='y', alpha=0.6)
  
fun1()
fun2()

Although I used tight_layout this does not help with the overlapping of the two histograms.

Answer 1

You have specified the subplots in this order

ax = fig.add_subplot(1, 1, 1)
ax2 = fig.add_subplot(2, 1, 2)

What you meant should be this

ax = fig.add_subplot(2, 1, 1)
ax2 = fig.add_subplot(2, 1, 2)

(2, 1) will arrange the plots in 2 rows and 1 column, then the third parameter is to specify subplots 1 and 2

If you specify (1, 2) there will be 1 row and 2 columns

ax = fig.add_subplot(1, 2, 1)
ax2 = fig.add_subplot(1, 2, 2)