将panda列中的json字符串值提取到具有第一级动态键的新列中

import pandas as pd
import json

data = {'json_column': ['{"key1": "value1", "key2": "value2"}', '{"key1": "value3", "key2": "value4"}']}
df = pd.DataFrame(data)

def extract_json_value(json_str, key):
    try:
        json_data = json.loads(json_str)
        return json_data[key]
    except (KeyError, json.JSONDecodeError):
        return None

df['new_column'] = df['json_column'].apply(lambda x: extract_json_value(x, 'key1'))