Examples

import numpy as np
import pandas as pd

df = pd.DataFrame([(.24, .34), (.02, .70), (.64, .04), (.24, .20)],
                  columns=['deers', 'goats'])
df

	deers	goats
0	0.24	0.34
1	0.02	0.70
2	0.64	0.04
3	0.24	0.20

By providing an integer each column is rounded to the same number of decimal places:

df.round(1)

	deers	goats
0	0.2	0.3
1	0.0	0.7
2	0.6	0.0
3	0.2	0.2

With a dict, the number of places for specific columns can be specified with the column
names as key and the number of decimal places as value:

df.round({'deers': 1, 'goats': 0})

	deers	goats
0	0.2	0.0
1	0.0	1.0
2	0.6	0.0
3	0.2	0.0

Using a Series, the number of places for specific columns can be specified with the column
names as index and the number of decimal places as value:

decimals = pd.Series([0, 1], index=['deers', 'goats'])
df.round(decimals)

	deers	goats
0	0.0	0.3
1	0.0	0.7
2	1.0	0.0
3	0.0	0.2