如何将函数名作为Python中的字符串?

In Python, how do I get a function name as a string without calling the function?

在Python中，如何在不调用函数的情况下将函数名作为字符串获取?

def my_function():
    pass

print get_function_name_as_string(my_function) # my_function is not in quotes

should output "my_function".

应该输出“my_function”。

Is this available in python? If not, any idea how to write get_function_name_as_string in Python?

这在python中可用吗?如果没有，您知道如何在Python中编写get_function_name_as_string吗?

9 个解决方案

#1

my_function.__name__

Using __name__ is the preferred method as it applies uniformly. Unlike func_name, it works on built-in functions as well:

使用__name__是首选的方法，因为它是统一应用的。与func_name不同，它也在内置函数上工作:

>>> import time
>>> time.time.func_name
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'builtin_function_or_method' object has no attribute 'func_name'
>>> time.time.__name__ 
'time'

Also the double underscores indicate to the reader this is a special attribute. As a bonus, classes and modules have a __name__ attribute too, so you only have remember one special name.

另外，双下划线向读者表明这是一个特殊的属性。另外，类和模块也有一个__name__属性，所以您只能记住一个特殊的名称。

#2

You could also use

您还可以使用

import sys
this_function_name = sys._getframe().f_code.co_name

#3

my_function.func_name

There are also other fun properties of functions. Type dir(func_name) to list them. func_name.func_code.co_code is the compiled function, stored as a string.

函数还有其他有趣的性质。键入dir(func_name)以列出它们。func_name.func_code。co_code是编译后的函数，存储为字符串。

import dis
dis.dis(my_function)

will display the code in almost human readable format. :)

将以几乎人类可读的格式显示代码。:)

#4

This function will return the caller's function name.

这个函数将返回调用者的函数名。

def func_name():
    import traceback
    return traceback.extract_stack(None, 2)[0][2]

It is like Albert Vonpupp's answer with a friendly wrapper.

这就像阿尔伯特·冯普普用友好的包装来回答问题。

#5

sys._getframe() is not guaranteed to be available in all implementations of Python (see ref) ,you can use the traceback module to do the same thing, eg.

sys._getframe()不能保证在Python的所有实现中都可用(请参阅ref)，您可以使用traceback模块做同样的事情，例如。

import traceback
def who_am_i():
   stack = traceback.extract_stack()
   filename, codeline, funcName, text = stack[-2]

   return funcName

A call to stack[-1] will return the current process details.

调用stack[-1]将返回当前进程的详细信息。

#6

If you're interested in class methods too, Python 3.3+ has __qualname__ in addition to __name__.

如果您也对类方法感兴趣，那么除了__name__之外，Python 3.3+还有__qualname__。

def my_function():
    pass

class MyClass(object):
    def method(self):
        pass

print(my_function.__name__)         # gives "my_function"
print(MyClass.method.__name__)      # gives "method"

print(my_function.__qualname__)     # gives "my_function"
print(MyClass.method.__qualname__)  # gives "MyClass.method"

#7

I like using a function decorator. I added a class, which also times the function time. Assume gLog is a standard python logger:

我喜欢使用函数修饰符。我添加了一个类，它也乘以函数时间。假设gLog是一个标准的python日志记录器:

class EnterExitLog():
    def __init__(self, funcName):
        self.funcName = funcName

    def __enter__(self):
        gLog.debug('Started: %s' % self.funcName)
        self.init_time = datetime.datetime.now()
        return self

    def __exit__(self, type, value, tb):
        gLog.debug('Finished: %s in: %s seconds' % (self.funcName, datetime.datetime.now() - self.init_time))

def func_timer_decorator(func):
    def func_wrapper(*args, **kwargs):
        with EnterExitLog(func.__name__):
            return func(*args, **kwargs)

    return func_wrapper

so now all you have to do with your function is decorate it and voila

现在你要做的就是装饰你的函数

@func_timer_decorator
def my_func():

#8

As an extension of @Demyn's answer, I created some utility functions which print the current function's name and current function's arguments:

作为@Demyn的答案的扩展，我创建了一些实用函数来打印当前函数的名称和当前函数的参数:

import inspect
import logging
import traceback

def get_function_name():
    return traceback.extract_stack(None, 2)[0][2]

def get_function_parameters_and_values():
    frame = inspect.currentframe().f_back
    args, _, _, values = inspect.getargvalues(frame)
    return ([(i, values[i]) for i in args])

def my_func(a, b, c=None):
    logging.info('Running ' + get_function_name() + '(' + str(get_function_parameters_and_values()) +')')
    pass

logger = logging.getLogger()
handler = logging.StreamHandler()
formatter = logging.Formatter(
    '%(asctime)s [%(levelname)s] -> %(message)s')
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.setLevel(logging.INFO)

my_func(1, 3) # 2016-03-25 17:16:06,927 [INFO] -> Running my_func([('a', 1), ('b', 3), ('c', None)])

#9

You just want to get the name of the function here is a simple code for that. let say you have these functions defined

你只需要得到函数名这里有一个简单的代码。假设你定义了这些函数

def function1():
    print "function1"

def function2():
    print "function2"

def function3():
    print "function3"
print function1.__name__

the output will be function1

输出是function1

Now let say you have these functions in a list

现在假设你在一个列表中有这些函数

a = [function1 , function2 , funciton3]

to get the name of the functions

获取函数的名称。

for i in a:
    print i.__name__

the output will be

输出将

function1
function2
function3

function1 function2 function3