QST: saving edges as shape file

[cdkang]

Hello,

I have measured linearity with momepy as below. I want to know how to save it as shape file. The error message said " Invalid field type <class 'tuple'>"

edges.to_file("C:/mo2/edges_shape.shp")

---

ValueError Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_13696/672022182.py in
----> 1 edges.to_file("C:/mo2/edges_shape.shp")

C:\anaconda\envs\geo\lib\site-packages\geopandas\geodataframe.py in to_file(self, filename, driver, schema, index, **kwargs)
1112 from geopandas.io.file import _to_file
1113
-> 1114 _to_file(self, filename, driver, schema, index, **kwargs)
1115
1116 def set_crs(self, crs=None, epsg=None, inplace=False, allow_override=False):

C:\anaconda\envs\geo\lib\site-packages\geopandas\io\file.py in _to_file(df, filename, driver, schema, index, mode, crs, **kwargs)
394 filename, mode=mode, driver=driver, crs_wkt=crs_wkt, schema=schema, **kwargs
395 ) as colxn:
--> 396 colxn.writerecords(df.iterfeatures())
397
398

C:\anaconda\envs\geo\lib\site-packages\fiona\collection.py in writerecords(self, records)
359 if self.mode not in ('a', 'w'):
360 raise IOError("collection not open for writing")
--> 361 self.session.writerecs(records, self)
362 self._len = self.session.get_length()
363 self._bounds = None

fiona/ogrext.pyx in fiona.ogrext.WritingSession.writerecs()

fiona/ogrext.pyx in fiona.ogrext.OGRFeatureBuilder.build()

ValueError: Invalid field type <class 'tuple'>

[martinfleis]

Hi,

This is not an issue with momepy, strictly speaking. Your GeoDataFrame edges contains a column with tuple values. SHP does not support tuple data type, therefore raises an error. You either need to drop the column causing this or convert it to something else (like string or multiple columns). Since I do not know the contents of your GeoDataFrame, I am unable to help further.

In any case, I'd like to point out that this tracker is primarily for issue reporting and suggestions for further development. I would recommend trying asking your questions like this one on http://stackoverflow.com or http://gis.stackexchange.com and filing an issue only if you won't get a response there. I am certain that the community there would be happy to help you with the question above.

[cdkang]

Thank you. Let me try to solve the issue or ask it in StackOverflow.