pandas map to dictionary code example

Example 1: pandas rename column values dictionary

df['col1'].map(di)       # note: if the dictionary does not exhaustively map all
                         # entries then non-matched entries are changed to NaNs

Example 2: maping value to data in pandas dataframe

note: u can assigne values in each of the common values in the dataframe 

df['new_coloum'] = df['coloum'].map({'value_1':1,'value_2':0})

Example 3: pandas rename column values dictionary

df['col1'].map(di).fillna(df['col1'])