how to change value in pandas dataframe code example

Example 1: replacing values in pandas dataframe

df['coloum'] = df['coloum'].replace(['value_1','valu_2'],'new_value')

Example 2: replace multiple values in pandas column

df = pd.DataFrame({'a':['Small', 'Medium', 'High']})

In [22]: df
Out[22]: 
        a
0   Small
1  Medium
2    High

[3 rows x 1 columns]

df.replace({'a' : { 'Medium' : 2, 'Small' : 1, 'High' : 3 }})

Example 3: column.replace

df.column = df.coloumn.replace('old_value', 'new_value')