Plotting bar graph with categories

import matplotlib.pyplot as plt
import pandas as pd

data = [['Hello mate', 0], ['xxXSADF', 1], ['GG boys', 0]]
df = pd.DataFrame(data, columns=['sentence', 'spam_ham'])

class_counts = pd.value_counts(df['spam_ham'], sort = True)
class_counts.plot(kind = 'bar', rot=0, color=['blue','red']) #Added colors as a list 
plt.title('Counts of Ham/Spam')
plt.xticks(range(2), ['Ham', 'Spam'])
plt.xlabel("Class")
plt.ylabel("Count")