How to determine if a column contains certain elements in pandas

Question

I want to check if the column app contains the element of myList.

import pandas as pd 
df=pd.DataFrame({\'app\':[\'a,b,c\',\'e,f\']})
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Answer 1

Use str.get_dummies for all indicator columns and then filter them by reindex by list:

df = df.join(df['app'].str.get_dummies(',').reindex(columns=myList).add_prefix('contains_'))
print (df)
     app  contains_b  contains_f
0  a,b,c           1           0
1    e,f           0           1

Or use loop with str.contains and casting boolean mask to integers:

for c in myList:
    df[f'contains_{c}'] = df['app'].str.contains(c).astype(int)
print (df)
     app  contains_b  contains_f
0  a,b,c           1           0
1    e,f           0           1