查看函数是否已被调用
查看函数是否已被调用
提问于 2012-03-27 09:42:38
我正在用Python编程，我想知道是否可以在我的代码中测试是否调用了函数
def example():
pass
example()
#Pseudocode:
if example.has_been_called:
print("foo bar")我该怎么做呢？
回答 3
Stack Overflow用户
回答已采纳
发布于 2012-03-27 10:06:48
如果函数知道自己的名称是可以的，那么可以使用函数属性：
def example():
example.has_been_called = True
pass
example.has_been_called = False
example()
#Actual Code!:
if example.has_been_called:
print("foo bar")您还可以使用装饰器来设置属性：
import functools
def trackcalls(func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
wrapper.has_been_called = True
return func(*args, **kwargs)
wrapper.has_been_called = False
return wrapper
@trackcalls
def example():
pass
example()
#Actual Code!:
if example.has_been_called:
print("foo bar")Stack Overflow用户
发布于 2019-11-22 19:19:45
我们可以使用mock.Mock
from unittest import mock
def check_called(func):
return mock.Mock(side_effect=func)
@check_called
def summator(a, b):
print(a + b)
summator(1, 3)
summator.assert_called()
assert summator.called == True
assert summator.call_count > 0
summator.assert_called_with(1, 3)
summator.assert_called_with(1, 5) # error
# AssertionError: Expected call: mock(1, 5)
# Actual call: mock(1, 3)Stack Overflow用户
发布于 2016-11-14 15:01:20
这里有一个装饰器，它将使用colorama观察你所有的函数，并返回一个很好的输出。
try:
import colorama
except ImportError:
class StdClass: pass
def passer(*args, **kwargs): pass
colorama = StdClass()
colorama.init = passer
colorama.Fore = StdClass()
colorama.Fore.RED = colorama.Fore.GREEN = ''
def check_for_use(show=False):
if show:
try:
check_for_use.functions
except AttributeError:
return
no_error = True
for function in check_for_use.functions.keys():
if check_for_use.functions[function][0] is False:
print(colorama.Fore.RED + 'The function {!r} hasn\'t been called. Defined in "{}" '.format(function, check_for_use.functions[function][1].__code__.co_filename))
no_error = False
if no_error:
print(colorama.Fore.GREEN + 'Great! All your checked function are being called!')
return check_for_use.functions
try:
check_for_use.functions
except AttributeError:
check_for_use.functions = {}
if colorama:
colorama.init(autoreset=True)
def add(function):
check_for_use.functions[function.__name__] = [False, function]
def func(*args, **kwargs):
check_for_use.functions[function.__name__] = [True, function]
function(*args, **kwargs)
return func
return add
@check_for_use()
def hello():
print('Hello world!')
@check_for_use()
def bonjour(nb):
print('Bonjour tout le monde!')
# hello(); bonjour(0)
hello()
check_for_use(True) # outputs the following输出：
Hello world!
The function 'bonjour' hasn't been called. Defined in "path_to_file.py" 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/9882280
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