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nbdime is a tool for diffing and merging of Jupyter notebooks.
Notice that nbdime integrates with git well.
If you install nbdime to your local directory, make sure …
https://pandas.pydata.org/pandas-docs/stable/merging.html
http://stackoverflow.com/questions/22676081/pandas-the-difference-between-join-and-merge
You are able to specify (via left_on and right_on) which columns to join in each data frame.
Columns that appear in both data frames but not used in joining are distinguished using suffixes.