# For Python 3
# In place of the dollar sign $ put any sign you would need
graph.yaxis.set_major_formatter('${x:1.2f}')
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import matplotlib.ticker as mtick
df = pd.DataFrame({'A': ['A', 'B'], 'B': [1000,2000]})
fig, ax = plt.subplots(1, 1, figsize=(2, 2))
df.plot(kind='bar', x='A', y='B',
align='center', width=.5, edgecolor='none',
color='grey', ax=ax)
fmt = '${x:,.0f}'
tick = mtick.StrMethodFormatter(fmt)
ax.yaxis.set_major_formatter(tick)
plt.xticks(rotation=25)
plt.show()