KeyError exception when trying to open a file that doesn't exist

[simonlsk]

Example trace for img = Image.open("data/raw/images/199.png")

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

ERROR:root:Internal Python error in the inspect module.
Below is the traceback from this internal error.

--- Logging error ---
--- Logging error ---
--- Logging error ---
--- Logging error ---
--- Logging error ---
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/dagshub/streaming/filesystem.py", line 208, in stat
    return self.__stat(relative_path, dir_fd=self.project_root_fd)
FileNotFoundError: [Errno 2] No such file or directory: '<ipython-input-30-4f1112fdef07>'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.7/linecache.py", line 74, in checkcache
    stat = os.stat(fullname)
  File "/usr/local/lib/python3.7/dist-packages/dagshub/streaming/filesystem.py", line 210, in stat
    if str(relative_path.name) not in self.dirtree[str(relative_path.parent)]:
KeyError: '.'

Original exception was:
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/dagshub/streaming/filesystem.py", line 181, in open
    return self.__open(relative_path, mode, *args, **kwargs, opener=project_root_opener)
FileNotFoundError: [Errno 2] No such file or directory: 'data/raw/images/199.png'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/IPython/core/interactiveshell.py", line 3326, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-30-4f1112fdef07>", line 6, in <module>
  File "/usr/local/lib/python3.7/dist-packages/PIL/Image.py", line 2843, in open
    fp = builtins.open(filename, "rb")
  File "/usr/local/lib/python3.7/dist-packages/dagshub/streaming/filesystem.py", line 193, in open
    raise FileNotFoundError(f'Error finding {relative_path} in repo or on DagsHub')
FileNotFoundError: Error finding data/raw/images/199.png in repo or on DagsHub

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/IPython/core/interactiveshell.py", line 2040, in showtraceback
    stb = value._render_traceback_()
AttributeError: 'FileNotFoundError' object has no attribute '_render_traceback_'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/dagshub/streaming/filesystem.py", line 208, in stat
    return self.__stat(relative_path, dir_fd=self.project_root_fd)
FileNotFoundError: [Errno 2] No such file or directory: '<ipython-input-30-4f1112fdef07>'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/IPython/core/ultratb.py", line 1101, in get_records
    return _fixed_getinnerframes(etb, number_of_lines_of_context, tb_offset)
  File "/usr/local/lib/python3.7/dist-packages/IPython/core/ultratb.py", line 319, in wrapped
    return f(*args, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/IPython/core/ultratb.py", line 353, in _fixed_getinnerframes
    records = fix_frame_records_filenames(inspect.getinnerframes(etb, context))
  File "/usr/lib/python3.7/inspect.py", line 1502, in getinnerframes
    frameinfo = (tb.tb_frame,) + getframeinfo(tb, context)
  File "/usr/lib/python3.7/inspect.py", line 1460, in getframeinfo
    filename = getsourcefile(frame) or getfile(frame)
  File "/usr/lib/python3.7/inspect.py", line 693, in getsourcefile
    if os.path.exists(filename):
  File "/usr/lib/python3.7/genericpath.py", line 19, in exists
    os.stat(path)
  File "/usr/local/lib/python3.7/dist-packages/dagshub/streaming/filesystem.py", line 210, in stat
    if str(relative_path.name) not in self.dirtree[str(relative_path.parent)]:
KeyError: '.'

self.dirtree[str(relative_path.parent)] should probably change to self.dirtree.get(str(relative_path.parent))