struggle to run example from documentation

[SergeyAnufriev]

code:

import r5py
import r5py.sampledata.helsinki

transport_network = r5py.TransportNetwork(
r5py.sampledata.helsinki.osm_pbf,
[r5py.sampledata.helsinki.gtfs],
)

output:

C:\Users\anufr\miniconda3\envs\r5py\python.exe C:\Users\anufr\PycharmProjects\data_generation\hello_world.py
Traceback (most recent call last):
File "OSM.java", line 207, in com.conveyal.osmlib.OSM.readFromFile
java.io.java.io.FileNotFoundException: java.io.FileNotFoundException: C:\Users\anufr\AppData\Local\Temp\r5py31qtocm0\TransportNetwork_1a6352887a0_0087ca0\data_generation (Access is denied)

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

Traceback (most recent call last):
File "OSM.java", line 207, in com.conveyal.osmlib.OSM.readFromFile
java.lang.java.lang.RuntimeException: java.lang.RuntimeException: java.io.FileNotFoundException: C:\Users\anufr\AppData\Local\Temp\r5py31qtocm0\TransportNetwork_1a6352887a0_0087ca0\data_generation (Access is denied)

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

Traceback (most recent call last):
File "OSM.java", line 210, in com.conveyal.osmlib.OSM.readFromFile
Exception: Java Exception

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

Traceback (most recent call last):
File "C:\Users\anufr\PycharmProjects\data_generation\hello_world.py", line 4, in
transport_network = r5py.TransportNetwork(
^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\anufr\miniconda3\envs\r5py\Lib\site-packages\r5py\r5\transport_network.py", line 62, in init
osm_file.readFromFile(f"{osm_pbf}")
java.lang.java.lang.RuntimeException: java.lang.RuntimeException: Error occurred while parsing OSM file C:\Users\anufr\AppData\Local\Temp\r5py31qtocm0\TransportNetwork_1a6352887a0_0087ca0\data_generation
Exception ignored in: <function TransportNetwork.del at 0x000001A6355F6480>
Traceback (most recent call last):
File "C:\Users\anufr\miniconda3\envs\r5py\Lib\site-packages\r5py\r5\transport_network.py", line 101, in del
self.osm_file.close()
^^^^^^^^^^^^^
AttributeError: 'TransportNetwork' object has no attribute 'osm_file'

Process finished with exit code 1

[dankdipper]

I've found this to be an issue with the provided sample data - the cached path doesn't seem to be stored in the SampleDataSet directly when the sample data module is initially imported. Using r5py.sampledata.helsinki.osm_pbf.cached_path and similar works as a workaround though.

[christophfink]

Thanks for this bug report. This should have been fixed in PR #410 and will work in the next release. In the meantime, using trunk r5py (install with pip install git+https://github.com/r5py/r5py.git) is a workaround