Python：如果两个单元格都包含某些字符串

我有一个数据帧：

                            name   alike
0  I love watermelon and banana.   melon
1  I love watermelon and banana.  banana
2                  I love melon.   melon
3                  I love grape.   grape

代码：

输出：

                            name       alike
0  I love watermelon and banana.  watermelon
1  I love watermelon and banana.  watermelon
2                  I love melon.       melon
3                  I love grape.       grape

这不是我所期望的结果，我只想在“name”包含西瓜和“like”包含瓜的情况下更改“like”

我试过这样做：

df.loc[df['name'].str.contains('watermelon') and df['alike'].str.contains('melon'), 'alike'] = 'watermelon'
print(df)

错误是这样的：

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

:

或者使用

apply（…，axis=1）

就你而言：

df["alike"] = df.apply(
    lambda row: "watermelon" if "watermelon" in row["name"] and "melon" in row["alike"] else row["alike"],
    axis=1
)

可能重复的

df.loc[df['name'].str.contains('watermelon') & df['alike'].str.contains('melon'), 'alike'] = 'watermelon'

df = pd.DataFrame({
    "a": ["hello", "heello", "hello you"], 
    "b": ["haha", "hehe", "haha hehe"], 
    "c": ["yes", "yes", "yes"]
})

print(df)

df["c"] = df.apply(
    lambda row: row["c"] if "hello" in row["a"] and "hehe" in row["b"] else "no",
    axis=1)

print(df)

           a          b    c
0      hello       haha  yes
1     heello       hehe  yes
2  hello you  haha hehe  yes
           a          b    c
0      hello       haha   no
1     heello       hehe   no
2  hello you  haha hehe  yes

df["alike"] = df.apply(
    lambda row: "watermelon" if "watermelon" in row["name"] and "melon" in row["alike"] else row["alike"],
    axis=1
)