根据同一pandas dataframe的另一列中是否存在子字符串为列赋值

import pandas as pd

data = {'Name': ['John', 'Mike', 'Sarah', 'Amy'],
        'Age': [25, 30, 28, 35],
        'City': ['New York', 'London', 'Paris', 'Tokyo']}
df = pd.DataFrame(data)

df['Has_Substring'] = df['Name'].apply(lambda x: True if 'a' in x else False)

print(df)

   Name  Age      City  Has_Substring
0  John   25  New York           True
1  Mike   30    London          False
2  Sarah  28     Paris           True
3  Amy    35     Tokyo           True