Pandas merges simplified

pd_merge.py

import pandas as pd

def merge(left, *rights, **kwargs):
  ''' Helper function for many trivial (index based) joins
  Usage:
    merge(frame1, frame2, frame3, how='inner')
  '''
  merged = left
  for right in rights:
    merged = pd.merge(left=merged, left_index=True, right=right, right_index=True, **kwargs)
  return merged