python shapely parallel_offset not found -

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i'm trying use shapely parallel_offset, sems it's not found. i've included imports found in examples, doesn't recognize parallel_offset.

from matplotlib import pyplot shapely.geometry import linestring descartes import polygonpatch  line=linestring([(0,0),(0,1),(1,1),(2,0)]) offset = line.parallel_offset(1,'left',join_style=2)

and get:

$ python parallel_offset.py  traceback (most recent call last):   file "parallel_offset.py", line 6, in <module>     offset = line.parallel_offset(1,'left',join_style=2) attributeerror: 'linestring' object has no attribute 'parallel_offset'

what doing wrong?

this feature has 2 requirements both need met:

  • shapely >= 1.2.8
  • geos >= 3.2.0

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