matplotlib hist adjustment

hist.py

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt

np.random.seed(209313920)

x = np.random.randint(1, 4, 500)

# we can see that the histgram x-ticks seems insensible when the 
# range of values is small
print('A histogram of 500 int64 numbers between 1 and 3')
# print(x)
plt.hist(x, bins=3, rwidth=0.5)
plt.show()

# but for a larger range
x = np.random.randint(1, 301, 500)

print('A histogram of 500 int64 numbers between 1 and 300')
plt.hist(x, bins=100, rwidth=0.5)
plt.show()

# In order to adjust the histogram with small number of bins we specify
# the xticks of the plot as show bellow
x = np.random.randint(1, 4, 500)
# but when we
print('A histogram of 500 int64 numbers between 1 and 3')
# print(x)
plt.hist(x, bins=range(1,5), rwidth=0.5, align='left')
plt.xticks(range(7))
plt.show()