Python/pandas: Converting Numbers By Comma Separated For Thousands

I have a dataframe with a column containing long numbers. I am trying to convert all the values in the numbers column to comma separated for thousands. df col_1 col_2 Rooney

Solution 1:

You can use string formatting,

df['col_2'] = pd.to_numeric(df['col_2'].fillna(0), errors='coerce')    
df['col_2'] = df['col_2'].map('{:,.2f}'.format)

Do remember that the col_2 now will be string not integer.

    col_1   col_2
0   Rooney  34,590,927.00
1   Ronaldo 5,467,382.00
2   John    25,647,398.00

Solution 2:

apply format function to col_2

df = df.assign(col_2=df.col_2.astype(int).apply('{:,}'.format))

     col_1       col_2
0   Rooney  34,590,9271  Ronaldo   5,467,3822     John  25,647,398