Error running nbblack

[ffs97]

• nbblack version: nbblack, version 0+untagged.9.gc36d102
• Python version: 3.7.4
• Operating System: Arch Linux

Description

I faced an issue while running nbblack from the terminal on a simple notebook and faced an error reported below.

What I Did

> nbblack notebook.ipynb

Traceback (most recent call last):
  File "/home/fat-fighter/software/conda/envs/ml/bin/nbblack", line 11, in <module>
    load_entry_point('nbblack==0+untagged.9.gc36d102', 'console_scripts', 'nbblack')()
  File "/home/fat-fighter/software/conda/envs/ml/lib/python3.7/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/home/fat-fighter/software/conda/envs/ml/lib/python3.7/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/home/fat-fighter/software/conda/envs/ml/lib/python3.7/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/fat-fighter/software/conda/envs/ml/lib/python3.7/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/home/fat-fighter/software/conda/envs/ml/lib/python3.7/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/fat-fighter/software/conda/envs/ml/lib/python3.7/site-packages/nbblack-0+untagged.9.gc36d102-py3.7.egg/nbblack/cli.py", line 150, in main
    nb = blacken_notebook_contents(notebook.read())
AttributeError: 'PosixPath' object has no attribute 'read'

Would really appreciate some help with this. Also, thanks for creating this plugin. It is my first time using it so I might be using it incorrectly.