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PermissionError when using Jupyter Notebooks

JeanineFinn

Hello --

I am working my way through these ArcGIS API for Python tutorials and hit a snag on this one: https://developers.arcgis.com/python/guide/download-data/

At Step 4, creating a directory for the data and downloading the zip file, I get a permission error.

PermissionError                           Traceback (most recent call last)
In  [11]:
Line 4:     data_path.mkdir()

File C:\Users\JeanineF\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\pathlib.py, in mkdir:
Line 1323:  self._accessor.mkdir(self, mode)

PermissionError: [WinError 5] Access is denied: 'data'

I've looked around in these directories with a terminal window and I have correct permissions as far as I can tell (I've confirmed with our IT as well).

Is there some conflict here I'm not understanding?

Thanks!

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rzufelt

Yes, os.sep is concatenating the strings together using the Operating System separator to build the path.

JeanineFinn

Thanks -- that did it. I had to go back and import the os module for this Notebook but that did it.

"os.sep" tells it how to connect the paths since we're not using ".joinpath" -- correct?

Thanks for your help!

rzufelt

.joinpath is specific to the pathlib. with the hard coded path:

zip_path = data_path + os.sep + 'LA_Hub_Datasets.zip'
extract_path = data_path + os.sep + 'LA_Hub_datasets'

should work.

JeanineFinn

That worked -- thanks!

But it's still not liking the string ZIP filename. Very weird.

# configure where to save the data, and where the ZIP file is located
data_path = r'C:\gis'
###if not data_path.exists():
 ###   data_path.mkdir()
zip_path = data_path.joinpath('LA_Hub_Datasets.zip')
extract_path = data_path.joinpath('LA_Hub_datasets')
data_item.download(save_path=data_path)

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
In  [9]:
Line 5:     zip_path = data_path.joinpath('LA_Hub_Datasets.zip')

AttributeError: 'str' object has no attribute 'joinpath'
------------------------------------------------------------

rzufelt

It says "to the notebook server's current location". So, may or may not exist or have permissions depending on where it is.

You might try creating a local folder (eg. C:\data) and hardcode the path to that folder.

data_path = r'C:\data'

You will have to update it in steps 4-6.

This will at least tell us if it is a location/permission issue.

JeanineFinn

It just returns

data

Which is not correct? That line of code creating the data_path variable looks like is should be creating a path to "data" directory within the current directory, yes?

rzufelt

what does

print(data_path)

return?

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