PYTHON

dataframe column contains string

df[df['A'].str.contains("hello")]

python check if dataframe series contains string

mel_count=a['Names'].str.contains('Mel').sum()
if mel_count>0:
    print ("There are {m} Mels".format(m=mel_count))

pandas check if a string inside a string

import pandas as pd

BabyDataSet = [('Bob', 968), ('Jessica', 155), ('Mary', 77), ('John', 578), ('Mel', 973)]

a = pd.DataFrame(data=BabyDataSet, columns=['Names', 'Births'])

if a['Names'].str.contains('Mel'):
    print ("Mel is there")

if string contains loop pandas

substr = ('dog', 'bird', 'cat')
df['B'] = df['A'].str.findall('|'.join(substr)).str.len()