How Python Gets the name of the current function and calls it through a string

Gets the current function name:

Application Environment: Sometimes, in order to simplify and better extend the program, we need to get to the currently running function name

Method 1 (not recommended)

import sysdef I_want_to_know_my_name():    print(sys._getframe().f_code.co_name) #你懂得,下划线开头的不应该使用的

Method 2

import tracebackdef who_am_i():    return traceback.extract_stack()[-2][2]def I_want_to_know_my_name():    print(who_am_i())

Method 3

import inspectdef who_am_i2():    return inspect.stack()[1][3]def I_want_to_know_my_name():    print(who_am_i2())      

Calling a function from a string

Called by reflection or exec, there are examples of classes and functions below
Class:

class foo(object):    def load(self):        f = getattr(self, "load_json")        f()    def load_json(self):        print("This is load_json module")myfunc = foo()myfunc.load()

Function (Reflection):

# 单模块情况下, 多模块就import module1,  然后getattr(module1....)import sysdef bar():    print("This is bar")def foo():    print("This is foo")def check_str(stra):    mod = sys.modules[__name__] #获取当前模块对象    if hasattr(mod, stra):        getattr(mod, stra)()    else:        print("No this module")check_str("bar") #你可能会问如果输入check_str会怎么样, 我会告诉你缺少变量并报错,不过最好还是在上面函数加判断避免这种情况出现

function (EXEC):

def bar():    print("This is bar")def foo(stra):    try:        exec(stra)    except:        print("No this module")foo("bar()")

Examples of combined use

Assuming a function of load is provided externally, through a series of judgments, I get to a value of ext_module_name, through this value and "load", I am all kinds of low wrong, is load. If you need to extend XML later, Gson, Yaml, and so on, only write the corresponding # # #_load就可以了

import tracebackext_module_name = "_pickle_" #假设这个变量是之前一系列过程得到的结果def who_am_i():    return traceback.extract_stack()[-2][2]def _json_load():    print("json load")def _pickle_load():    print("pickle load")def load():    my_name = who_am_i()    try:        return exec("%s%s()" % (ext_module_name, my_name))    except Exception as e:        raise eload()

How Python Gets the name of the current function and calls it through a string