搜索一列中的字符串并提取匹配行 Python 的所有列

Question

I am trying to search for a string in one column and I want to extract whole dataframe when string matches in the column

My Data is as follows

**string**  **Number**
hello there     11
Hello hi        22
How are you     33

My code is as follows

string_hello = []
for i in df['string']:
    if re.search("Hello",i, flags=re.I): 
        string_hello.append(i)

Expected result is

**string**  **Number**
hello there     11
Hello hi        22

But My code only gives string column, how can I extract number column too?

Answer 1

You can use str.contains and perform boolean indexing on the dataframe with the result:

df[df.string.str.lower().str.contains(r'hello')]

      string    Number
0  hello there      11
1     Hello hi      22