如何在pandas中将搜索到的字符串插入到新行中

import pandas as pd

df = pd.DataFrame(columns=['search_string'])

search_string = input("请输入搜索字符串：")

new_row = {'search_string': search_string}
df = df.append(new_row, ignore_index=True)

import pandas as pd

# 创建空的DataFrame
df = pd.DataFrame(columns=['search_string'])

# 获取用户输入的搜索字符串
search_string = input("请输入搜索字符串：")

# 将搜索字符串插入到DataFrame中
new_row = {'search_string': search_string}
df = df.append(new_row, ignore_index=True)

print(df)