Creating a linestring from points using shapely

Question

I am creating a linestring from points using shapely, but I could not generate the linestring using the points on my local system. This code is running fine on Google Colab. Is there any package dependency which I don't have installed on my system?

import shapely
from shapely import speedups
from shapely import geometry
from shapely.geometry import shape, Point, LineString, Polygon
a = LineString([(0, 0), (1, 1), (1,2), (2,2)])
a
Error massage 
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-18-02826fee6746> in <module>
----> 1 a = LineString([(0, 0), (1, 1), (1,2), (2,2)])
 2 a
c:\python37\lib\site-packages\shapely\geometry\linestring.py in __init__(self, coordinates)
 46 BaseGeometry.__init__(self)
 47 if coordinates is not None:
---> 48 self._set_coords(coordinates)
 49 
 50 @property
c:\python37\lib\site-packages\shapely\geometry\linestring.py in _set_coords(self, coordinates)
 95 def _set_coords(self, coordinates):
 96 self.empty()
---> 97 ret = geos_linestring_from_py(coordinates)
 98 if ret is not None:
 99 self._geom, self._ndim = ret
c:\python37\lib\site-packages\shapely\speedups\_speedups.pyx in shapely.speedups._speedups.geos_linestring_from_py()
ValueError: GEOSGeom_createLineString_r returned a NULL pointer

• menes: Try to update numpy. i don't know if it helps.

Answer 1

As you can see here, the error message is an old problem, and you can fix it by changing the order of the import process like this:

import shapely
from shapely import speedups
from shapely import geometry
from shapely.geometry import shape, Point, LineString, Polygon
import fiona
 
a = LineString([(0, 0), (1, 1), (1,2), (2,2)])

Another way is to disable speedups:

import shapely
from shapely import speedups
from shapely import geometry
from shapely.geometry import shape, Point, LineString, Polygon
speedups.disable()
a = LineString([(0, 0), (1, 1), (1,2), (2,2)])