[Bug] TypeError: 'str' object is not callable, when unnormalize with customize mean and std

[genghisun]

torchshow.set_image_mean([0., 0., 0.])
torchshow.set_image_std([1., 1., 1.])
torchshow.show(img)


---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)

File /somepath/python3.8/site-packages/torchshow/visualization.py:289, in vis_image(x, unnormalize, **kwargs)
    [287]     if user_std == None:
    [288]         user_std = [1.] * x.shape[-1] # Initialize std to 1 if not specified.
--> [289]     x = unnormalize(x, user_mean, user_std)
    [291] elif unnormalize=='auto':
    [292]     x = auto_unnormalize_image(x)

TypeError: 'str' object is not callable

It seems to be caused by the variable name and method name being the same 'unnormalize'.
And this case should be added to the test.

[xwying]

Thank you for spotting this bug! I really forgot this function since I barely use it myself.