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import numpy as np
import pytest
from shapely import Point, geos_version
from shapely.coords import CoordinateSequence
from shapely.errors import DimensionError, UnsupportedGEOSVersionError
def test_from_coordinates():
# Point
p = Point(1.0, 2.0)
assert p.coords[:] == [(1.0, 2.0)]
assert p.has_z is False
# PointZ
p = Point(1.0, 2.0, 3.0)
assert p.coords[:] == [(1.0, 2.0, 3.0)]
assert p.has_z
# empty
p = Point()
assert p.is_empty
assert isinstance(p.coords, CoordinateSequence)
assert p.coords[:] == []
def test_from_sequence():
# From single coordinate pair
p = Point((3.0, 4.0))
assert p.coords[:] == [(3.0, 4.0)]
p = Point([3.0, 4.0])
assert p.coords[:] == [(3.0, 4.0)]
# From coordinate sequence
p = Point([(3.0, 4.0)])
assert p.coords[:] == [(3.0, 4.0)]
p = Point([[3.0, 4.0]])
assert p.coords[:] == [(3.0, 4.0)]
# PointZ
p = Point((3.0, 4.0, 5.0))
assert p.coords[:] == [(3.0, 4.0, 5.0)]
p = Point([3.0, 4.0, 5.0])
assert p.coords[:] == [(3.0, 4.0, 5.0)]
p = Point([(3.0, 4.0, 5.0)])
assert p.coords[:] == [(3.0, 4.0, 5.0)]
def test_from_numpy():
# Construct from a numpy array
p = Point(np.array([1.0, 2.0]))
assert p.coords[:] == [(1.0, 2.0)]
p = Point(np.array([1.0, 2.0, 3.0]))
assert p.coords[:] == [(1.0, 2.0, 3.0)]
def test_from_numpy_xy():
# Construct from separate x, y numpy arrays - if those are length 1,
# this is allowed for compat with shapely 1.8
# (https://github.com/shapely/shapely/issues/1587)
p = Point(np.array([1.0]), np.array([2.0]))
assert p.coords[:] == [(1.0, 2.0)]
p = Point(np.array([1.0]), np.array([2.0]), np.array([3.0]))
assert p.coords[:] == [(1.0, 2.0, 3.0)]
def test_from_point():
# From another point
p = Point(3.0, 4.0)
q = Point(p)
assert q.coords[:] == [(3.0, 4.0)]
p = Point(3.0, 4.0, 5.0)
q = Point(p)
assert q.coords[:] == [(3.0, 4.0, 5.0)]
def test_from_generator():
gen = (coord for coord in [(1.0, 2.0)])
p = Point(gen)
assert p.coords[:] == [(1.0, 2.0)]
def test_from_invalid():
with pytest.raises(TypeError, match="takes at most 3 arguments"):
Point(1, 2, 3, 4)
# this worked in shapely 1.x, just ignoring the other coords
with pytest.raises(
ValueError, match="takes only scalar or 1-size vector arguments"
):
Point([(2, 3), (11, 4)])
class TestPoint:
def test_point(self):
# Test XY point
p = Point(1.0, 2.0)
assert p.x == 1.0
assert type(p.x) is float
assert p.y == 2.0
assert type(p.y) is float
assert p.coords[:] == [(1.0, 2.0)]
assert str(p) == p.wkt
assert p.has_z is False
with pytest.raises(DimensionError):
p.z
if geos_version >= (3, 12, 0):
assert p.has_m is False
with pytest.raises(DimensionError):
p.m
else:
with pytest.raises(UnsupportedGEOSVersionError):
p.m
# Check XYZ point
p = Point(1.0, 2.0, 3.0)
assert p.coords[:] == [(1.0, 2.0, 3.0)]
assert str(p) == p.wkt
assert p.has_z is True
assert p.z == 3.0
assert type(p.z) is float
if geos_version >= (3, 12, 0):
assert p.has_m is False
with pytest.raises(DimensionError):
p.m
# TODO: Check XYM and XYZM points
# Coordinate access
p = Point((3.0, 4.0))
assert p.x == 3.0
assert p.y == 4.0
assert tuple(p.coords) == ((3.0, 4.0),)
assert p.coords[0] == (3.0, 4.0)
with pytest.raises(IndexError): # index out of range
p.coords[1]
# Bounds
assert p.bounds == (3.0, 4.0, 3.0, 4.0)
# Geo interface
assert p.__geo_interface__ == {"type": "Point", "coordinates": (3.0, 4.0)}
def test_point_empty(self):
# Test Non-operability of Null geometry
p_null = Point()
assert p_null.wkt == "POINT EMPTY"
assert p_null.coords[:] == []
assert p_null.area == 0.0
assert p_null.__geo_interface__ == {"type": "Point", "coordinates": ()}
def test_coords(self):
# From Array.txt
p = Point(0.0, 0.0, 1.0)
coords = p.coords[0]
assert coords == (0.0, 0.0, 1.0)
# Convert to Numpy array, passing through Python sequence
a = np.asarray(coords)
assert a.ndim == 1
assert a.size == 3
assert a.shape == (3,)
def test_point_immutable():
p = Point(3.0, 4.0)
with pytest.raises(AttributeError):
p.coords = (2.0, 1.0)
with pytest.raises(TypeError):
p.coords[0] = (2.0, 1.0)
def test_point_array_coercion():
# don't convert to array of coordinates, keep objects
p = Point(3.0, 4.0)
arr = np.array(p)
assert arr.ndim == 0
assert arr.size == 1
assert arr.dtype == np.dtype("object")
assert arr.item() == p
def test_numpy_empty_point_coords():
pe = Point()
# Access the coords
a = np.asarray(pe.coords)
assert a.shape == (0, 2)
def test_numpy_object_array():
geom = Point(3.0, 4.0)
ar = np.empty(1, object)
ar[:] = [geom]
assert ar[0] == geom
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