Linked Questions

here is my decorator: def check_domain(func): def wrapper(domain_id, *args, **kwargs): domain = get_object_or_None(Domain, id=domain_id) if not domain: return None ...

In the following example code below, we have an undecorated function fun() and a decorated one wrappedfun(). For the undecorated function fun, pressing TAB in IPython notebook after the opening ...

Is it possible to give a wrapped function the arg and kwargs names of the function it is wrapping? I need to do this because decorators that are applied later use the arg names of the underlying ...

In a comment on this answer to another question, someone said that they weren't sure what functools.wraps was doing. So, I'm asking this question so that there will be a record of it on StackOverflow ...

Given that a function a_method has been defined like def a_method(arg1, arg2): pass Starting from a_method itself, how can I get the argument names - for example, as a tuple of strings, like (&...

Is there an easy way to be inside a python function and get a list of the parameter names? For example: def func(a,b,c): print magic_that_does_what_I_want() >>> func() ['a','b','c'] ...

Suppose I have a generic function f. I want to programmatically create a function f2 that behaves the same as f, but has a customized signature. More detail Given a list l and and dictionary d I ...

I have my simple decorator my_decorator which decorates the my_func. def my_decorator(func): def wrapper(*args, **kwargs): return func(*args, **kwargs) wrapper._decorator_name_ = '...

The functionality of the decorator module and functools.wraps is closely related. What are the differences between the two (as of Python 3.3 / 3.4)? I am aware of one difference: 3+ years ago, ...

I have a function with many arguments and a detailed help message, e.g.: def worker_function(arg1, arg2, arg3): """ desired help message: arg1 - blah arg2 - foo arg3 - bar """ ...

How do I nicely write a decorator? In particular issues include: compatibility with other decorators, preserving of signatures, etc. I would like to avoid dependency on the decorator module if ...

Is there a way to get the number of actual parameters passed to a function def foo(a, optional=42): if ???? print "1 arg" else: print "2 args" foo(11) # should print 1 ...

I have a base decorator that takes arguments but that also is built upon by other decorators. I can't seem to figure where to put the functools.wraps in order to preserve the full signature of the ...

When using classmethod to dynamic change the method in subclass, how to dynamic change signatures of method? example import inspect class ModelBase(object): @classmethod def method_one(...

I have a decorator to retry some operations for 3 times if a deadlock happens, and does some logging in the process: def retry_on_deadlock(func): logger = logging.getLogger('test') @wraps(...