CODEWITHSUNDEEP
pythonpython-importpython-decorators
Julian S.
Julian S.

Reputation: 450

Using decorators of optional dependency

Lets say I have the following code:

try:
    import bar
except ImportError:
    bar = None

@bar.SomeProvidedDecorator
def foo():
    pass

where bar is an optional dependency. The code above will fail, if bar isn't imported. Is there a recommended way of dealing with this problem?

I came up with:

try:
    import bar
except ImportError:
    bar = None

def foo():
    pass

if bar is not None:
    foo = bar.SomeProvidedDecorator(foo)

but I'm wondering if there are better ways of handling this (i.e. is there a way to keep the decorator syntax) ?

Upvotes: 5

Views: 324

Answers (1)

Roman Pavelka
Roman Pavelka

Reputation: 4181

Provide an identity decorator in case of bar unavailability:

try:
    import bar
except ImportError:
    class bar:
        SomeProvidedDecorator = lambda f: f

Upvotes: 6

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