Join two Pandas DataFrames together

join.py

"""
Join two DataFrames together
"""

import pandas as pd

hist_1 = [
    {'bucket': '0-1',  'develop': 0},
    {'bucket': '2-4',  'develop': 1}
]

df1 = pd.DataFrame(hist_1).set_index('bucket')

hist_2 = [
    {'bucket': '0-1',  'approve': 0},
    {'bucket': '2-4',  'approve': 2},
    {'bucket': '5-6',  'approve': 1}
]

df2 = pd.DataFrame(hist_2).set_index('bucket')

df3 = df1.join(df2, how='outer')

print df3