Plotting on a log scale

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(-10, 10, 1000)
y = x**3

fig = plt.figure()

def do_plot(ax_no, axes, scale_type):
    ax = fig.add_subplot(3, 2, ax_no)
    ax.set_title('({})'.format(chr(96+ax_no)))
    ax.plot(x, y)
    for axis in axes:
        if axis == 'x':
            ax.set_xscale(scale_type)
        else:
            ax.set_yscale(scale_type)

do_plot(1, ('x',), 'log')
do_plot(2, ('x',), 'symlog')
do_plot(3, ('y',), 'log')
do_plot(4, ('y',), 'symlog')
do_plot(5, ('x', 'y'), 'log')
do_plot(6, ('x', 'y'), 'symlog')

fig.tight_layout()
plt.show()