在列的开头和结尾添加字符

Question

Im trying to add " in the beginning and end of the column in a df.我试图在 df 列的开头和结尾添加" 。

Eg - Initial dataframe:例如 - 初始 dataframe：

A       B
Hello   What
I       Is
AM      MY

Output: Output：

A       B
Hello   "What
I       Is
AM      MY"

Answer 1

You could use iat to index on the specific strings, and format them with:您可以使用iat对特定字符串进行索引，并使用以下格式对其进行格式化：

df.iat[0,1] = f'"{df.iat[0,1]}'
df.iat[-1,1] = f'{df.iat[-1,1]}"'

print(df)

       A      B
0  Hello  "What
1      I     Is
2     AM    MY"