import matplotlib.pyplot as plt; plt.rcdefaults()
import numpy as np
import matplotlib.pyplot as plt

objects = ('Male', 'Female')
y_pos = np.arange(2)
values = [10,8]

plt.bar(y_pos, values, width=0.12, align='center', alpha=0.2)
plt.xticks(y_pos, objects)
plt.ylabel('Usage')
plt.title('Male vs Female')

plt.show()