Setting the same axis limits for all subplots

Set the xlim and ylim properties on the Artist object by matplotlib.pyplot.setp() https://matplotlib.org/3.1.0/api/_as_gen/matplotlib.pyplot.setp.html

# Importing matplotlib.pyplot package.
import matplotlib.pyplot as plt

# Assigning 'fig', 'ax' variables.
fig, ax = plt.subplots(2, 2)

# Defining custom 'xlim' and 'ylim' values.
custom_xlim = (0, 100)
custom_ylim = (-100, 100)

# Setting the values for all axes.
plt.setp(ax, xlim=custom_xlim, ylim=custom_ylim)