python实现API调用缓存

想把python某些函数的参数及返回值记录下来,如果之前已计算过,则直接返回缓存中的数据

1.代码

import jsondef get_variable_name(var):'''变量转变量名'''local_vars=globals()return [name for name, value in local_vars.items() if value is var][0]def quick_exec(func,params):'''通过参数生成UUID,如果缓存中存在则直接获取,否则执行实际的函数,之后保存结果'''cache_path="cache_data.json"records={}uuid="_".join([str(x) for x in params])try:with open(cache_path,"r") as f:records=json.load(f)except:passif uuid in records:ret=records[uuid]["result"]else:ret=func(params)records[uuid]={"result":ret,"params":{}}for var in params:records[uuid]["params"][get_variable_name(var)]=varwith open(cache_path,"w") as f:json.dump(records,f,indent=4)return retdef sdk_api(params):'''实际的调用'''print("sdk_api call in:",params)return sum(params)def l0():globals()['a']=1globals()['b']=2globals()['c']=3globals()['d']=4globals()['e']=5params=(globals()['a'],globals()['b'],globals()['c'],globals()['d'],globals()['e'])ret=quick_exec(lambda x:sdk_api(x),params)print(ret)ret=quick_exec(lambda x:sdk_api(x),params)print(ret)globals()['b']=3params=(a,b,c,d,e)ret=quick_exec(lambda x:sdk_api(x),params)print(ret)ret=quick_exec(lambda x:sdk_api(x),params)print(ret)def l1():l0()def main():l1()
main()

2.输出

# 第一次运行
sdk_api call in: (1, 2, 3, 4, 5)
15
15
sdk_api call in: (1, 3, 3, 4, 5)
16
16
# 第二次运行
15
15
16
16

3.保存的json数据

{"1_2_3_4_5": {"result": 15,"params": {"a": 1,"b": 2,"c": 3,"d": 4,"e": 5}},"1_3_3_4_5": {"result": 16,"params": {"a": 1,"b": 3,"d": 4,"e": 5}}
}