Encoding

import pandas as pd
list1 = ['A','B','B','A','C']
df=pd.DataFrame(list1,columns={'Values'})
df
Values
0 A
1 B
2 B
3 A
4 C 
from sklearn import preprocessing
encode = preprocessing.LabelEncoder()
df['Encoded_Value'] = encode.fit_transform(df['Values'])
df
Values Encoded_Value
0 A 0
1 B 1
2 B 1
3 A 0
4 C 2