Add data from a dataframe to another

Question

I'd like to add data from a dataframe to a another dataframe.

Here my first data frame: df

Here my second dataframe: dff

df.append(dff, ignore_index=True, sort=False)

And it results me that:

Answer 1

Appending is adding two dataframe 'on top of each other' so you add rows. If you want to add new columns to your dataframe from another dataframe, you use join or merge especially if you have a key column where you can merge, which is in your case Postal Code

In pandas we use pd.merge for merging two dataframes with each other like the followng:

df_final = pd.merge(df, dff, on='Postal Code')


    Postal Code     Borough     Neighbourhood   Lattitude   Longitude
0   M1B             Scarborough Rouge           43.806686   -79.194353
1   M1B             Scarborough Malvern         43.806686   -79.194353
2   M1C             Scarborough Port Union      43.784535   -79.160497
3   M1C             Scarborough Rouge Hill      43.784535   -79.160497
4   M1C             Scarborough Highland Creek  43.784535   -79.160497

Answer 2

I think merge is what you're looking for.

df.merge(dff, on='Postal Code')

should do the trick.