使用Python pandas将项目详细信息的json列扩展到新行中

import pandas as pd
import json

data = {'项目名称': ['项目A', '项目B'],
        '项目详细信息': ['{"开始日期": "2022-01-01", "结束日期": "2022-02-01", "负责人": "张三"}',
                   '{"开始日期": "2022-03-01", "结束日期": "2022-04-01", "负责人": "李四"}']}
df = pd.DataFrame(data)

def expand_json_to_rows(df, column_name):
    expanded_rows = []
    for index, row in df.iterrows():
        json_data = json.loads(row[column_name])
        for key, value in json_data.items():
            row_copy = row.copy()
            row_copy[key] = value
            expanded_rows.append(row_copy)
    expanded_df = pd.DataFrame(expanded_rows)
    return expanded_df

expanded_df = expand_json_to_rows(df, '项目详细信息')