Dear Jonathan,
the error is due to grass_session that is not creating the location if
missing.
I don't have time in this day to fix this issue in grass_session, so the
fastest fsolution at the momenth is to check and create what is needed step
by step.
I did not have xyz file to test so I've only execute g.gisenv and it works,
let me know if it works also with r.inxyz:
```python
from __future__ import print_function
import os
from grass_session import Session
from grass.script import core as gcore
GISDBASE = "/tmp/grassdata"
LOCATION = "nrw"
EPSG = "EPSG:4326"
if not os.path.exists(GISDBASE):
os.makedirs(GISDBASE)
if not os.path.exists(os.path.join(GISDBASE, LOCATION)):
with Session(gisdb=GISDBASE, location=LOCATION,
create_opts=EPSG):
print("Created a new location!")
else:
print("Location already exist!")
with Session(gisdb=GISDBASE, location=LOCATION, mapset="elevation",
create_opts=""):
gcore.run_command("g.gisenv")
```
Best regards
Pietro
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