remove error-causing type check

examples/compute-many-points-quickly-using-numpy-arrays.py

@@ -1,17 +1,23 @@
-"""The goal of this gist is to show how to compute many points on a path 
+""" An example of how to speed up point() calculations with vectorization.
+
+The goal of this gist is to show how to compute many points on a path
 quickly using NumPy arrays.  I.e. there's a much faster way than using, say
 [some_path.point(t) for t in many_tvals].  The example below assumes the 
 `Path` object is composed entirely of `CubicBezier` objects, but this can
 easily be generalized to paths containing `Line` and `QuadraticBezier` objects
 also.
+
 Note: The relevant matrix transformation for quadratics can be found in the
-svgpathtools.bezier module."""
+svgpathtools.bezier module.
+"""
+
 from __future__ import print_function
 import numpy as np
-from svgpathtools import *
+from svgpathtools import bezier_point, bpoints2bezier, polynomial2bezier, Path
 
 
 class HigherOrderBezier:
+    """Bezier curve of arbitrary degree"""
     def __init__(self, bpoints):
         self.bpts = bpoints
 
@@ -38,7 +44,7 @@ def points_in_each_seg_slow(path, tvals):
 
 def points_in_each_seg(path, tvals):
     """Compute seg.point(t) for each seg in path and each t in tvals."""
-    A = np.array([[-1,  3, -3,  1], # transforms cubic bez to standard poly
+    A = np.array([[-1,  3, -3,  1],  # transforms cubic bez to standard poly
                   [ 3, -6,  3,  0],
                   [-3,  3,  0,  0],
                   [ 1,  0,  0,  0]])

requirements.txt

@@ -1,2 +1,3 @@
 numpy
 svgwrite
+defusedxml

setup.py

@@ -30,9 +30,9 @@ setup(name='svgpathtools',
       download_url='{}/releases/download/{}/svgpathtools-{}-py2.py3-none-any.whl'
                    ''.format(GITHUB, VERSION, VERSION),
       license='MIT',
-      install_requires=['numpy', 'svgwrite'],
+      install_requires=['numpy', 'svgwrite', 'defusedxml'],
       platforms="OS Independent",
-      requires=['numpy', 'svgwrite'],
+      requires=['numpy', 'svgwrite', 'defusedxml'],
       keywords=['svg', 'svg path', 'svg.path', 'bezier', 'parse svg path', 'display svg'],
       classifiers=[
             "Development Status :: 4 - Beta",

svgpathtools/bezier.py

@@ -31,13 +31,9 @@ def bezier_point(p, t):
     Warning:  Be concerned about numerical stability when using this function
     with high order curves."""
 
-    # begin arc support block ########################
-    try:
-        p.large_arc
+    # for Arc support
+    if hasattr(p, 'radius'):
         return p.point(t)
-    except:
-        pass
-    # end arc support block ##########################
 
     deg = len(p) - 1
     if deg == 3:
@@ -145,14 +141,11 @@ def split_bezier(bpoints, t):
 
 
 def halve_bezier(p):
+    """split path segment into two halves at t=0.5"""
 
-    # begin arc support block ########################
-    try:
-        p.large_arc
+    # for Arc support
+    if hasattr(p, 'radius'):
         return p.split(0.5)
-    except:
-        pass
-    # end arc support block ##########################
 
     if len(p) == 4:
         return ([p[0], (p[0] + p[1])/2, (p[0] + 2*p[1] + p[2])/4,
@@ -199,13 +192,9 @@ def bezier_bounding_box(bez):
     (xmin, xmax, ymin, ymax).
     Warning: For the non-cubic case this is not particularly efficient."""
 
-    # begin arc support block ########################
-    try:
-        bla = bez.large_arc
-        return bez.bbox()  # added to support Arc objects
-    except:
-        pass
-    # end arc support block ##########################
+    # for Arc support
+    if hasattr(bez, 'radius'):
+        return bez.bbox()
 
     if len(bez) == 4:
         xmin, xmax = bezier_real_minmax([p.real for p in bez])

svgpathtools/document.py

@@ -36,10 +36,15 @@ A Big Problem:
 # External dependencies
 from __future__ import division, absolute_import, print_function
 import os
+import sys
 import collections
-import xml.etree.ElementTree as etree
-from xml.etree.ElementTree import Element, SubElement, register_namespace
-from xml.dom.minidom import parseString
+from defusedxml.cElementTree import parse, tostring
+from xml.etree.cElementTree import register_namespace
+if sys.version_info.major == 2:
+    from xml.etree.ElementTree import Element, SubElement, ElementTree
+else:
+    from xml.etree.cElementTree import Element, SubElement, ElementTree
+from defusedxml.minidom import parseString
 import warnings
 from tempfile import gettempdir
 from time import time
@@ -97,9 +102,6 @@ def flattened_paths(group, group_filter=lambda x: True,
             only convert explicit path elements, pass in
             `path_conversions=CONVERT_ONLY_PATHS`.
     """
-    if not isinstance(group, Element):
-        raise TypeError('Must provide an xml.etree.Element object. '
-                        'Instead you provided {0}'.format(type(group)))
 
     # Stop right away if the group_selector rejects this group
     if not group_filter(group):
@@ -244,10 +246,10 @@ class Document:
             self.original_filepath = os.path.join(os.getcwd(), filepath)
 
         if filepath is None:
-            self.tree = etree.ElementTree(Element('svg'))
+            self.tree = ElementTree(Element('svg'))
         else:
             # parse svg to ElementTree object
-            self.tree = etree.parse(filepath)
+            self.tree = parse(filepath)
 
         self.root = self.tree.getroot()
 
@@ -416,7 +418,7 @@ class Document:
             SVG_NAMESPACE['svg']), group_attribs)
 
     def __repr__(self):
-        return etree.tostring(self.tree.getroot()).decode()
+        return tostring(self.tree.getroot()).decode()
 
     def pretty(self, **kwargs):
         return parseString(repr(self)).toprettyxml(**kwargs)

svgpathtools/path.py

@@ -920,6 +920,7 @@ class QuadraticBezier(object):
         if t0 == 1 and t1 == 0:
             if self._length_info['bpoints'] == self.bpoints():
                 return self._length_info['length']
+
         a = self.start - 2*self.control + self.end
         b = 2*(self.control - self.start)
         a_dot_b = a.real*b.real + a.imag*b.imag
@@ -927,20 +928,23 @@ class QuadraticBezier(object):
         if abs(a) < 1e-12:
             s = abs(b)*(t1 - t0)
         else:
-            c2 = 4 * (a.real ** 2 + a.imag ** 2)
-            c1 = 4 * a_dot_b
-            c0 = b.real ** 2 + b.imag ** 2
+            with np.testing.suppress_warnings() as sup:
+                sup.filter(RuntimeWarning)
+                c2 = 4 * (a.real ** 2 + a.imag ** 2)
+                c1 = 4 * a_dot_b
+                c0 = b.real ** 2 + b.imag ** 2
 
-            beta = c1 / (2 * c2)
-            gamma = c0 / c2 - beta ** 2
+                beta = c1 / (2 * c2)
+                gamma = c0 / c2 - beta ** 2
+
+                dq1_mag = sqrt(c2 * t1 ** 2 + c1 * t1 + c0)
+                dq0_mag = sqrt(c2 * t0 ** 2 + c1 * t0 + c0)
+                logarand = (sqrt(c2) * (t1 + beta) + dq1_mag) / \
+                           (sqrt(c2) * (t0 + beta) + dq0_mag)
+                s = (t1 + beta) * dq1_mag - (t0 + beta) * dq0_mag + \
+                    gamma * sqrt(c2) * log(logarand)
+                s /= 2
 
-            dq1_mag = sqrt(c2 * t1 ** 2 + c1 * t1 + c0)
-            dq0_mag = sqrt(c2 * t0 ** 2 + c1 * t0 + c0)
-            logarand = (sqrt(c2) * (t1 + beta) + dq1_mag) / \
-                       (sqrt(c2) * (t0 + beta) + dq0_mag)
-            s = (t1 + beta) * dq1_mag - (t0 + beta) * dq0_mag + \
-                gamma * sqrt(c2) * log(logarand)
-            s /= 2
             if isnan(s):
                 tstar = abs(b) / (2 * abs(a))
                 if t1 < tstar:

svgpathtools/paths2svg.py

@@ -8,7 +8,7 @@ from __future__ import division, absolute_import, print_function
 from math import ceil
 from os import path as os_path, makedirs
 from tempfile import gettempdir
-from xml.dom.minidom import parse as md_xml_parse
+from defusedxml.minidom import parse as md_xml_parse
 from svgwrite import Drawing, text as txt
 from time import time
 from warnings import warn

svgpathtools/polytools.py

@@ -10,19 +10,26 @@ from .misctools import isclose
 
 
 def polyroots(p, realroots=False, condition=lambda r: True):
+    """Returns the roots of a polynomial with coefficients given in p.
+
+        p[0] * x**n + p[1] * x**(n-1) + ... + p[n-1]*x + p[n]
+
+    Args:
+        p: 1D array-like object of polynomial coefficients.
+        realroots: a boolean.  If true, only real roots will be returned
+            and the condition function can be written assuming all roots
+            are real.
+        condition: a boolean-valued function.  Only roots satisfying
+            this will be returned.  If realroots==True, these conditions
+            should assume the roots are real.
+
+    Returns:
+        (list) A list containing the roots of the polynomial.
+
+    Notes:
+        * This uses np.isclose and np.roots
     """
-    Returns the roots of a polynomial with coefficients given in p.
-      p[0] * x**n + p[1] * x**(n-1) + ... + p[n-1]*x + p[n]
-    INPUT:
-    p - Rank-1 array-like object of polynomial coefficients.
-    realroots - a boolean.  If true, only real roots will be returned  and the
-        condition function can be written assuming all roots are real.
-    condition - a boolean-valued function.  Only roots satisfying this will be
-        returned.  If realroots==True, these conditions should assume the roots
-        are real.
-    OUTPUT:
-    A list containing the roots of the polynomial.
-    NOTE:  This uses np.isclose and np.roots"""
+
     roots = np.roots(p)
     if realroots:
         roots = [r.real for r in roots if isclose(r.imag, 0)]
@@ -36,16 +43,18 @@ def polyroots(p, realroots=False, condition=lambda r: True):
 
 
 def polyroots01(p):
-    """Returns the real roots between 0 and 1 of the polynomial with
-    coefficients given in p,
-      p[0] * x**n + p[1] * x**(n-1) + ... + p[n-1]*x + p[n]
-    p can also be a np.poly1d object.  See polyroots for more information."""
+    """Returns the real roots 0 < x < 1 of the polynomial given by `p`.
+
+        p[0] * x**n + p[1] * x**(n-1) + ... + p[n-1]*x + p[n]
+
+    Notes:
+        p can also be a np.poly1d object.  See polyroots for more information.
+    """
     return polyroots(p, realroots=True, condition=lambda tval: 0 <= tval <= 1)
 
 
 def rational_limit(f, g, t0):
-    """Computes the limit of the rational function (f/g)(t)
-    as t approaches t0."""
+    """Computes the limit of the rational function (f/g)(t) as t approaches t0."""
     assert isinstance(f, np.poly1d) and isinstance(g, np.poly1d)
     assert g != np.poly1d([0])
     if g(t0) != 0:

svgpathtools/svg_io_sax.py

@@ -5,7 +5,8 @@
 # External dependencies
 from __future__ import division, absolute_import, print_function
 import os
-from xml.etree.ElementTree import iterparse, Element, ElementTree, SubElement
+from xml.etree.cElementTree import Element, ElementTree, SubElement
+from defusedxml.cElementTree import iterparse
 
 # Internal dependencies
 from .parser import parse_path

svgpathtools/svg_to_paths.py

@@ -3,7 +3,7 @@ The main tool being the svg2paths() function."""
 
 # External dependencies
 from __future__ import division, absolute_import, print_function
-from xml.dom.minidom import parse
+from defusedxml.minidom import parse
 from os import path as os_path, getcwd
 import re
 
@@ -17,9 +17,11 @@ COORD_PAIR_TMPLT = re.compile(
     r'([\+-]?\d*[\.\d]\d*[eE][\+-]?\d+|[\+-]?\d*[\.\d]\d*)'
 )
 
+
 def path2pathd(path):
     return path.get('d', '')
 
+
 def ellipse2pathd(ellipse):
     """converts the parameters from an ellipse or a circle to a string for a 
     Path object d-attribute"""

test/test_bezier.py

@@ -1,11 +1,12 @@
 from __future__ import division, absolute_import, print_function
 import numpy as np
 import unittest
-from svgpathtools.bezier import *
+from svgpathtools.bezier import bezier_point, bezier2polynomial, polynomial2bezier
 from svgpathtools.path import bpoints2bezier
 
 
 class HigherOrderBezier:
+    """To help test Bezier curves of arbitrary degree"""
     def __init__(self, bpoints):
         self.bpts = bpoints
 

test/test_generation.py

@@ -1,8 +1,7 @@
-# Note: This file was taken mostly as is from the svg.path module (v 2.0)
-#------------------------------------------------------------------------------
+"""credit: This was modified from a file in the svg.path module (v 2.0)"""
 from __future__ import division, absolute_import, print_function
 import unittest
-from svgpathtools import *
+from svgpathtools import parse_path
 
 
 class TestGeneration(unittest.TestCase):

test/test_groups.py

@@ -5,7 +5,7 @@ $ python -m unittest test.test_groups.TestGroups.test_group_flatten
 """
 from __future__ import division, absolute_import, print_function
 import unittest
-from svgpathtools import *
+from svgpathtools import Document, SVG_NAMESPACE, parse_path
 from os.path import join, dirname
 import numpy as np
 

test/test_parsing.py

@@ -1,7 +1,7 @@
 # Note: This file was taken mostly as is from the svg.path module (v 2.0)
 from __future__ import division, absolute_import, print_function
 import unittest
-from svgpathtools import *
+from svgpathtools import parse_path, Path, Line, QuadraticBezier, CubicBezier, Arc
 import svgpathtools
 import numpy as np
 

test/test_path.py

@@ -1,8 +1,6 @@
 # External dependencies
 from __future__ import division, absolute_import, print_function
-import os
-import sys
-import unittest
+from unittest import TestCase
 from math import sqrt, pi
 from operator import itemgetter
 import numpy as np
@@ -10,8 +8,11 @@ import random
 import warnings
 
 # Internal dependencies
-from svgpathtools import *
-from svgpathtools.path import _NotImplemented4ArcException, bezier_radialrange
+from svgpathtools import (
+    Line, QuadraticBezier, CubicBezier, Arc, Path, parse_path,
+    is_bezier_segment, is_bezier_path, poly2bez, bpoints2bezier,
+    closest_point_in_path, farthest_point_in_path, path_encloses_pt)
+from svgpathtools.path import bezier_radialrange
 
 # An important note for those doing any debugging:
 # ------------------------------------------------
@@ -66,7 +67,25 @@ def assert_intersections(test_case, a_seg, b_seg, intersections, count, msg=None
         test_case.assertAlmostEqual(a_seg.point(i[0]), b_seg.point(i[1]), msg=msg, delta=tol)
 
 
-class LineTest(unittest.TestCase):
+class AssertWarns(warnings.catch_warnings):
+    """A python 2 compatible version of assertWarns."""
+    def __init__(self, test_case, warning):
+        self.test_case = test_case
+        self.warning_type = warning
+        self.log = None
+        super(AssertWarns, self).__init__(record=True, module=None)
+
+    def __enter__(self):
+        self.log = super(AssertWarns, self).__enter__()
+        return self.log
+
+    def __exit__(self, *exc_info):
+        super(AssertWarns, self).__exit__(*exc_info)
+        self.test_case.assertEqual(type(self.log[0]), self.warning_type)
+
+
+# noinspection PyTypeChecker
+class LineTest(TestCase):
 
     def test_lines(self):
         # These points are calculated, and not just regression tests.
@@ -160,9 +179,9 @@ class LineTest(unittest.TestCase):
         self.assertIsNone(l.point_to_t(-0.001-0j))
 
         random.seed()
-        for line_index in range(100):
+        for _ in range(100):
             l = random_line()
-            for t_index in range(100):
+            for __ in range(100):
                 orig_t = random.random()
                 p = l.point(orig_t)
                 computed_t = l.point_to_t(p)
@@ -183,7 +202,8 @@ class LineTest(unittest.TestCase):
             self.assertAlmostEqual(max_ta, max_tb, delta=TOL)
 
 
-class CubicBezierTest(unittest.TestCase):
+# noinspection PyTypeChecker
+class CubicBezierTest(TestCase):
     def test_approx_circle(self):
         """This is a approximate circle drawn in Inkscape"""
 
@@ -419,14 +439,13 @@ class CubicBezierTest(unittest.TestCase):
         segment = CubicBezier(complex(600, 500), complex(600, 350),
                               complex(900, 650), complex(900, 500))
 
-        self.assertTrue(segment ==
-                CubicBezier(600 + 500j, 600 + 350j, 900 + 650j, 900 + 500j))
-        self.assertTrue(segment !=
-                CubicBezier(600 + 501j, 600 + 350j, 900 + 650j, 900 + 500j))
+        self.assertTrue(segment == CubicBezier(600 + 500j, 600 + 350j, 900 + 650j, 900 + 500j))
+        self.assertTrue(segment != CubicBezier(600 + 501j, 600 + 350j, 900 + 650j, 900 + 500j))
         self.assertTrue(segment != Line(0, 400))
 
 
-class QuadraticBezierTest(unittest.TestCase):
+# noinspection PyTypeChecker
+class QuadraticBezierTest(TestCase):
 
     def test_svg_examples(self):
         """These is the path in the SVG specs"""
@@ -495,25 +514,24 @@ class QuadraticBezierTest(unittest.TestCase):
         # This is to test the __eq__ and __ne__ methods, so we can't use
         # assertEqual and assertNotEqual
         segment = QuadraticBezier(200 + 300j, 400 + 50j, 600 + 300j)
-        self.assertTrue(segment ==
-            QuadraticBezier(200 + 300j, 400 + 50j, 600 + 300j))
-        self.assertTrue(segment !=
-            QuadraticBezier(200 + 301j, 400 + 50j, 600 + 300j))
+        self.assertTrue(segment == QuadraticBezier(200 + 300j, 400 + 50j, 600 + 300j))
+        self.assertTrue(segment != QuadraticBezier(200 + 301j, 400 + 50j, 600 + 300j))
         self.assertFalse(segment == Arc(0j, 100 + 50j, 0, 0, 0, 100 + 50j))
         self.assertTrue(Arc(0j, 100 + 50j, 0, 0, 0, 100 + 50j) != segment)
 
 
-class ArcTest(unittest.TestCase):
+# noinspection PyTypeChecker
+class ArcTest(TestCase):
 
     def test_trusting_acos(self):
         """`u1.real` is > 1 in this arc due to numerical error."""
         try:
-            a1 = Arc(start=(160.197+102.925j),
-                     radius=(0.025+0.025j),
-                     rotation=0.0,
-                     large_arc=False,
-                     sweep=True,
-                     end=(160.172+102.95j))
+            _ = Arc(start=(160.197+102.925j),
+                    radius=(0.025+0.025j),
+                    rotation=0.0,
+                    large_arc=False,
+                    sweep=True,
+                    end=(160.172+102.95j))
         except ValueError:
             self.fail("Arc() raised ValueError unexpectedly!")
 
@@ -680,9 +698,9 @@ class ArcTest(unittest.TestCase):
         self.assertIsNone(a.point_to_t(730.5212132777968+171j))
 
         random.seed()
-        for arc_index in range(100):
+        for _ in range(100):
             a = random_arc()
-            for t_index in np.linspace(0, 1, 100):
+            for __ in np.linspace(0, 1, 100):
                 orig_t = random.random()
                 p = a.point(orig_t)
                 computed_t = a.point_to_t(p)
@@ -692,7 +710,7 @@ class ArcTest(unittest.TestCase):
 
     def test_approx_quad(self):
         n = 100
-        for i in range(n):
+        for _ in range(n):
             arc = random_arc()
             if arc.radius.real > 2000 or arc.radius.imag > 2000:
                 continue  # Random Arc too large, by autoscale.
@@ -705,7 +723,7 @@ class ArcTest(unittest.TestCase):
 
     def test_approx_cubic(self):
         n = 100
-        for i in range(n):
+        for _ in range(n):
             arc = random_arc()
             if arc.radius.real > 2000 or arc.radius.imag > 2000:
                 continue  # Random Arc too large, by autoscale.
@@ -717,7 +735,8 @@ class ArcTest(unittest.TestCase):
             self.assertAlmostEqual(d, 0.0, delta=2)
 
 
-class TestPath(unittest.TestCase):
+# noinspection PyTypeChecker
+class TestPath(TestCase):
 
     # def test_hash(self):
     #     line1 = Line(600.5 + 350.5j, 650.5 + 325.5j)
@@ -810,8 +829,7 @@ class TestPath(unittest.TestCase):
         # regression tests.
         self.assertAlmostEqual(path.point(0.0), (275 + 175j), delta=TOL)
         self.assertAlmostEqual(path.point(0.2800495767557787), (275 + 25j), delta=TOL)
-        self.assertAlmostEqual(path.point(0.5),
-                               (168.93398282201787 + 68.93398282201787j))
+        self.assertAlmostEqual(path.point(0.5), (168.93398282201787 + 68.93398282201787j))
         self.assertAlmostEqual(path.point(1 - 0.2800495767557787), (125 + 175j), delta=TOL)
         self.assertAlmostEqual(path.point(1.0), (275 + 175j), delta=TOL)
         # The errors seem to accumulate. Still 6 decimal places is more
@@ -852,7 +870,7 @@ class TestPath(unittest.TestCase):
             Arc(start=650 + 325j, radius=25 + 25j, rotation=-30,
                 large_arc=0, sweep=1, end=700 + 300j),
             CubicBezier(start=700 + 300j, control1=800 + 400j,
-                control2=750 + 200j, end=600 + 100j),
+                        control2=750 + 200j, end=600 + 100j),
             QuadraticBezier(start=600 + 100j, control=600, end=600 + 300j))
         self.assertEqual(eval(repr(path)), path)
 
@@ -864,14 +882,14 @@ class TestPath(unittest.TestCase):
             Arc(start=650 + 325j, radius=25 + 25j, rotation=-30,
                 large_arc=0, sweep=1, end=700 + 300j),
             CubicBezier(start=700 + 300j, control1=800 + 400j,
-                control2=750 + 200j, end=600 + 100j),
+                        control2=750 + 200j, end=600 + 100j),
             QuadraticBezier(start=600 + 100j, control=600, end=600 + 300j))
         path2 = Path(
             Line(start=600 + 350j, end=650 + 325j),
             Arc(start=650 + 325j, radius=25 + 25j, rotation=-30,
                 large_arc=0, sweep=1, end=700 + 300j),
             CubicBezier(start=700 + 300j, control1=800 + 400j,
-                control2=750 + 200j, end=600 + 100j),
+                        control2=750 + 200j, end=600 + 100j),
             QuadraticBezier(start=600 + 100j, control=600, end=600 + 300j))
 
         self.assertTrue(path1 == path2)
@@ -1041,17 +1059,17 @@ class TestPath(unittest.TestCase):
         test_curves = [bezpath, bezpathz, path, pathz, lpath, qpath, cpath,
                        apath, line1, arc1, arc2, cub1, cub2, quad3, linez]
 
-        def scale_a_point(pt, sx, sy=None, origin=0j):
+        def scale_a_point(pt_, sx_, sy_=None, origin_=0j):
 
-            if sy is None:
-                sy = sx
+            if sy_ is None:
+                sy_ = sx_
 
-            zeta = pt - origin
+            zeta = pt_ - origin_
             pt_vec = [[zeta.real],
                       [zeta.imag],
                       [1]]
-            transform = [[sx, 0, origin.real],
-                         [0, sy, origin.imag]]
+            transform = [[sx_, 0, origin_.real],
+                         [0, sy_, origin_.imag]]
 
             return complex(*np.dot(transform, pt_vec).ravel())
 
@@ -1075,6 +1093,8 @@ class TestPath(unittest.TestCase):
 
             # find seg which t lands on for failure reporting
             seg = curve
+            seg_idx = None
+            seg_t = None
             if isinstance(curve, Path):
                 seg_idx, seg_t = curve.T2t(t)
                 seg = curve[seg_idx]
@@ -1113,7 +1133,7 @@ class TestPath(unittest.TestCase):
                     curve.scaled(sx, sy).point(t)
             else:
                 curve_scaled = curve.scaled(sx, sy)
-                seg_scaled = seg.scaled(sx, sy)
+                _ = seg.scaled(sx, sy)
                 if isinstance(curve, Path):
                     res = curve_scaled[seg_idx].point(seg_t)
                 else:
@@ -1187,20 +1207,21 @@ class TestPath(unittest.TestCase):
         self.assertEqual(path2.d(use_closed_attrib=True, rel=True), rel_s)
 
 
-class Test_ilength(unittest.TestCase):
+# noinspection PyTypeChecker
+class Test_ilength(TestCase):
     # See svgpathtools.notes.inv_arclength.py for information on how these
     # test values were generated (using the .length() method).
     ##############################################################
 
     def test_ilength_lines(self):
         l = Line(1, 3-1j)
-        nodall = Line(1+1j, 1+1j)
+        # nodall = Line(1+1j, 1+1j)
 
         tests = [(l, 0.01, 0.022360679774997897),
-         (l, 0.1, 0.223606797749979),
-         (l, 0.5, 1.118033988749895),
-         (l, 0.9, 2.012461179749811),
-         (l, 0.99, 2.213707297724792)]
+                 (l, 0.1, 0.223606797749979),
+                 (l, 0.5, 1.118033988749895),
+                 (l, 0.9, 2.012461179749811),
+                 (l, 0.99, 2.213707297724792)]
 
         for (l, t, s) in tests:
             self.assertAlmostEqual(l.ilength(s), t, delta=TOL)
@@ -1210,37 +1231,31 @@ class Test_ilength(unittest.TestCase):
         q2 = QuadraticBezier(200 + 300j, 400 + 50j, 500 + 200j)
         closedq = QuadraticBezier(6 + 2j, 5 - 1j, 6 + 2j)
         linq = QuadraticBezier(1+3j, 2+5j, -9 - 17j)
-        nodalq = QuadraticBezier(1, 1, 1)
+        # nodalq = QuadraticBezier(1, 1, 1)
 
         tests = [(q1, 0.01, 6.364183310105577),
-         (q1, 0.1, 60.23857499635088),
-         (q1, 0.5, 243.8855469477619),
-         (q1, 0.9, 427.53251889917294),
-         (q1, 0.99, 481.40691058541813),
-         (q2, 0.01, 6.365673533661836),
-         (q2, 0.1, 60.31675895732397),
-         (q2, 0.5, 233.24592830045907),
-         (q2, 0.9, 346.42891253298706),
-         (q2, 0.99, 376.32659156736844),
-         (closedq, 0.01, 0.06261309767133393),
-         (closedq, 0.1, 0.5692099788303084),
-         (closedq, 0.5, 1.5811388300841898),
-         (closedq, 0.9, 2.5930676813380713),
-         (closedq, 0.99, 3.0996645624970456),
-         (linq, 0.01, 0.04203807797699605),
-         (linq, 0.1, 0.19379255804998186),
-         (linq, 0.5, 4.844813951249544),
-         (linq, 0.9, 18.0823363780483),
-         (linq, 0.99, 22.24410609777091)]
+                 (q1, 0.1, 60.23857499635088),
+                 (q1, 0.5, 243.8855469477619),
+                 (q1, 0.9, 427.53251889917294),
+                 (q1, 0.99, 481.40691058541813),
+                 (q2, 0.01, 6.365673533661836),
+                 (q2, 0.1, 60.31675895732397),
+                 (q2, 0.5, 233.24592830045907),
+                 (q2, 0.9, 346.42891253298706),
+                 (q2, 0.99, 376.32659156736844),
+                 (closedq, 0.01, 0.06261309767133393),
+                 (closedq, 0.1, 0.5692099788303084),
+                 (closedq, 0.5, 1.5811388300841898),
+                 (closedq, 0.9, 2.5930676813380713),
+                 (closedq, 0.99, 3.0996645624970456),
+                 (linq, 0.01, 0.04203807797699605),
+                 (linq, 0.1, 0.19379255804998186),
+                 (linq, 0.5, 4.844813951249544),
+                 (linq, 0.9, 18.0823363780483),
+                 (linq, 0.99, 22.24410609777091)]
 
         for q, t, s in tests:
-            try:
-                self.assertAlmostEqual(q.ilength(s), t, delta=TOL)
-            except:
-                print(q)
-                print(s)
-                print(t)
-                raise
+            self.assertAlmostEqual(q.ilength(s), t, delta=TOL)
 
     def test_ilength_cubics(self):
         c1 = CubicBezier(200 + 300j, 400 + 50j, 600+100j, -200)
@@ -1415,7 +1430,7 @@ class Test_ilength(unittest.TestCase):
         for (c, t, s) in tests:
             try:
                 self.assertAlmostEqual(c.ilength(s), t, msg=str((c, t, s)), delta=TOL)
-            except:
+            except ValueError:
                 # These test case values were generated using a system
                 # with scipy installed -- if scipy is not installed,
                 # then in cases where `t == 1`, `s` may be slightly
@@ -1438,7 +1453,8 @@ class Test_ilength(unittest.TestCase):
             lin.ilength(1)
 
 
-class Test_intersect(unittest.TestCase):
+# noinspection PyTypeChecker
+class Test_intersect(TestCase):
     def test_intersect(self):
 
         ###################################################################
@@ -1579,9 +1595,9 @@ class Test_intersect(unittest.TestCase):
         assert_intersections(self, a, l, intersections, 0)
 
         random.seed()
-        for arc_index in range(50):
+        for _ in range(50):
             a = random_arc()
-            for line_index in range(100):
+            for __ in range(100):
                 l = random_line()
                 intersections = a.intersect(l)
                 msg = 'Generated: arc = {}, line = {}'.format(a, l)
@@ -1738,7 +1754,8 @@ class Test_intersect(unittest.TestCase):
         assert_intersections(self, a0, a1, intersections, 0)
 
 
-class TestPathTools(unittest.TestCase):
+# noinspection PyTypeChecker
+class TestPathTools(TestCase):
     # moved from test_pathtools.py
 
     def setUp(self):
@@ -1973,7 +1990,7 @@ class TestPathTools(unittest.TestCase):
 
     def test_path_area(self):
         if not RUN_SLOW_TESTS:
-            warnings.warn("Skipping `test_path_area` as RUN_SLOW_TESTS is false.")
+            # warnings.warn("Skipping `test_path_area` as RUN_SLOW_TESTS is false.")
             return
         cw_square = Path()
         cw_square.append(Line((0+0j), (0+100j)))
@@ -2029,7 +2046,8 @@ class TestPathTools(unittest.TestCase):
         self.assertTrue(enclosing_shape.is_contained_by(larger_shape))
 
 
-class TestPathBugs(unittest.TestCase):
+# noinspection PyTypeChecker
+class TestPathBugs(TestCase):
 
     def test_issue_113(self):
         """
@@ -2053,9 +2071,21 @@ class TestPathBugs(unittest.TestCase):
         self.assertAlmostEqual(p.length(), 236.70287281737836, delta=TOL)
 
     def test_issue_71(self):
-        p = Path("M327 468z")
-        m = p.closed
-        q = p.d()  # Failing to Crash is good.
+        """Test that degenerate (point-like) paths behave properly."""
+        # degenerate (point-like) closed path
+        d_string = "M327 468z"
+        path = Path(d_string)
+
+        warning_type = warnings.WarningMessage
+        with AssertWarns(self, warning_type):
+            self.assertTrue(path.closed)
+
+        # test the Path.d() method reproduces an empty d-string
+        # note that ideally this would reproduce the original, but
+        # as a Path is a sequence of Bezier segments and arcs, and this
+        # d-string contains no Bezier segments or arcs, this output seems
+        # like an acceptable compromise
+        self.assertEqual(path.d(), '')
 
     def test_issue_95(self):
         """
@@ -2074,4 +2104,5 @@ class TestPathBugs(unittest.TestCase):
 
 
 if __name__ == '__main__':
-    unittest.main()
+    from unittest import main
+    main()

test/test_polytools.py

@@ -4,7 +4,7 @@ import unittest
 import numpy as np
 
 # Internal dependencies
-from svgpathtools import *
+from svgpathtools import rational_limit
 
 
 class Test_polytools(unittest.TestCase):

test/test_sax_groups.py

@@ -1,6 +1,6 @@
 from __future__ import division, absolute_import, print_function
 import unittest
-from svgpathtools import *
+from svgpathtools import SaxDocument
 from os.path import join, dirname
 
 

test/test_svg2paths.py

@@ -1,8 +1,9 @@
 from __future__ import division, absolute_import, print_function
 import unittest
-from svgpathtools import *
+from svgpathtools import svg2paths, Path, Line, Arc
 from os.path import join, dirname
 
+
 class TestSVG2Paths(unittest.TestCase):
     def test_svg2paths_polygons(self):
 
@@ -15,8 +16,8 @@ class TestSVG2Paths(unittest.TestCase):
                             Line(105.5+50j, 55.5+0j)
                             )
         self.assertTrue(path.isclosed())
-        self.assertTrue(len(path)==3)
-        self.assertTrue(path==path_correct)
+        self.assertEqual(len(path), 3)
+        self.assertEqual(path, path_correct)
 
         # triangular quadrilateral (with a redundant 4th "closure" point)
         path = paths[1]
@@ -26,8 +27,8 @@ class TestSVG2Paths(unittest.TestCase):
                             Line(0+0j, 0+0j)  # result of redundant point
                             )
         self.assertTrue(path.isclosed())
-        self.assertTrue(len(path)==4)
-        self.assertTrue(path==path_correct)
+        self.assertEqual(len(path), 4)
+        self.assertEqual(path, path_correct)
 
     def test_svg2paths_ellipses(self):
 
@@ -37,8 +38,8 @@ class TestSVG2Paths(unittest.TestCase):
         path_ellipse = paths[0]
         path_ellipse_correct = Path(Arc(50+100j, 50+50j, 0.0, True, False, 150+100j),
                                     Arc(150+100j, 50+50j, 0.0, True, False, 50+100j))
-        self.assertTrue(len(path_ellipse)==2)
-        self.assertTrue(path_ellipse==path_ellipse_correct)
+        self.assertEqual(len(path_ellipse), 2)
+        self.assertEqual(path_ellipse, path_ellipse_correct)
         self.assertTrue(path_ellipse.isclosed())
 
         # circle tests
@@ -46,7 +47,7 @@ class TestSVG2Paths(unittest.TestCase):
 
         path_circle = paths[0]
         path_circle_correct = Path(Arc(50+100j, 50+50j, 0.0, True, False, 150+100j),
-                                    Arc(150+100j, 50+50j, 0.0, True, False, 50+100j))
-        self.assertTrue(len(path_circle)==2)
-        self.assertTrue(path_circle==path_circle_correct)
+                                   Arc(150+100j, 50+50j, 0.0, True, False, 50+100j))
+        self.assertEqual(len(path_circle), 2)
+        self.assertEqual(path_circle, path_circle_correct)
         self.assertTrue(path_circle.isclosed())