PNG-FI format error

Hello, I’m trying to read a file according to some instructions.

imageio.imread('filename.png', format='PNG-FI')

Versions I’ve tried with are 2.14.1 and 2.21.1

Both times I receive the following stacktrace:

Traceback (most recent call last):
  File "/home/user/anaconda3/lib/python3.8/site-packages/imageio/core/imopen.py", line 163, in imopen
    return loader(request, **kwargs)
  File "/home/user/anaconda3/lib/python3.8/site-packages/imageio/core/imopen.py", line 152, in loader
    return config.plugin_class(request, **kwargs)
  File "/home/user/anaconda3/lib/python3.8/site-packages/imageio/config/plugins.py", line 108, in partial_legacy_plugin
    return LegacyPlugin(request, legacy_plugin)
  File "/home/user/anaconda3/lib/python3.8/site-packages/imageio/core/legacy_plugin_wrapper.py", line 68, in __init__
    raise InitializationError(
imageio.core.request.InitializationError: `PNG-FI` can not read `/home/user/filename.png`.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/user/anaconda3/lib/python3.8/site-packages/imageio/core/functions.py", line 159, in imread
    with imopen(uri, "ri", plugin=format) as file:
  File "/home/user/anaconda3/lib/python3.8/site-packages/imageio/core/imopen.py", line 181, in imopen
    raise err_type(err_msg) from err_from
RuntimeError: `PNG-FI` can not handle the given uri.

My colleague runs the same line on the same file with the same imageio version and it works. I tried installing imageio into a new conda environment but I always get this error. I didn’t find anything about this PNG-FI format, do you have an idea why I receive this error? Thank you very much

[FirefoxMetzger]

We could add a reference to the supported formats list to the docstring of plugin which might make it more obvious where to look for this information. I’ll see if I can add that once I have some spare time.

[biphasic]

you’re right, it is there! I guess I had a strong prior to some docstring that would explain parameter args and hence overlooked the result. Thanks for the library 😃