python pandas按子字符串熔化列

import pandas as pd

# 创建一个DataFrame
data = {'col1': ['apple', 'banana', 'orange', 'grape'],
        'col2': ['pineapple', 'watermelon', 'kiwi', 'mango']}
df = pd.DataFrame(data)

# 使用str.contains()函数按子字符串熔化列
df['col1_contains_a'] = df['col1'].str.contains('a')
df['col2_contains_m'] = df['col2'].str.contains('m')

print(df)

     col1         col2  col1_contains_a  col2_contains_m
0   apple    pineapple             True            False
1  banana   watermelon             True             True
2  orange         kiwi            False            False
3   grape        mango            False             True