Python:如何在python中从JSON模式中检索表名和对应的列名

import json

json_data = '{"table1": {"columns": ["col1", "col2"]}, "table2": {"columns": ["col3", "col4"]}}'
data = json.loads(json_data)

table_name = "table1"
columns = data[table_name]["columns"]

import json

def get_table_columns(json_data, table_name):
    data = json.loads(json_data)
    if table_name in data:
        return data[table_name]["columns"]
    else:
        return []

json_data = '{"table1": {"columns": ["col1", "col2"]}, "table2": {"columns": ["col3", "col4"]}}'
table_name = "table1"

columns = get_table_columns(json_data, table_name)
print(columns)