fixes #249, fixes #250

pyproject.toml

@@ -4,9 +4,7 @@ name = "anytree"
 dynamic = ["version"]
 description = "Powerful and Lightweight Python Tree Data Structure with various plugins"
 authors = [{ name = "c0fec0de", email = "[email protected]" }]
-dependencies = [
-    "six>=1.17.0",
-]
+dependencies = []
 requires-python = ">=3.9.2,<4.0"
 readme = "README.rst"
 license = "Apache-2.0"
@@ -38,7 +36,6 @@ dev = [
     "sphinx-rtd-theme>=2.0.0",
     "sphinxemoji>=0.3.1",
     "test2ref>=0.4.2",
-    "types-six>=1.17.0.20250403",
 ]
 
 [build-system]

src/anytree/exporter/dotexporter.py

@@ -6,8 +6,6 @@
 from subprocess import check_call
 from tempfile import NamedTemporaryFile
 
-import six
-
 from anytree import PreOrderIter
 
 _RE_ESC = re.compile(r'["\\]')
@@ -306,7 +304,7 @@ def to_picture(self, filename):
     @staticmethod
     def esc(value):
         """Escape Strings."""
-        return _RE_ESC.sub(lambda m: rf"\{m.group(0)}", six.text_type(value))
+        return _RE_ESC.sub(lambda m: rf"\{m.group(0)}", str(value))
 
 
 class UniqueDotExporter(DotExporter):

src/anytree/exporter/mermaidexporter.py

@@ -2,8 +2,6 @@
 import itertools
 import re
 
-import six
-
 from anytree import PreOrderIter
 
 _RE_ESC = re.compile(r'["\\]')
@@ -232,4 +230,4 @@ def to_file(self, filename):
     @staticmethod
     def esc(value):
         """Escape Strings."""
-        return _RE_ESC.sub(lambda m: rf"\{m.group(0)}", six.text_type(value))
+        return _RE_ESC.sub(lambda m: rf"\{m.group(0)}", str(value))

src/anytree/iterators/abstractiter.py

@@ -1,7 +1,4 @@
-import six
-
-
-class AbstractIter(six.Iterator):
+class AbstractIter:
     # pylint: disable=R0205
     """
     Iterate over tree starting at `node`.

src/anytree/render.py

@@ -10,8 +10,6 @@
 
 import collections
 
-import six
-
 from .config import ASSERTIONS
 
 Row = collections.namedtuple("Row", ("pre", "fill", "node"))
@@ -146,7 +144,6 @@ def __init__(self):
         super().__init__("\u2551   ", "\u2560\u2550\u2550 ", "\u255a\u2550\u2550 ")
 
 
-@six.python_2_unicode_compatible
 class RenderTree:
     """
     Render tree starting at `node`.

tests/helper.py

@@ -1,7 +1,6 @@
 """Helper Methods for testing."""
 
 from contextlib import contextmanager
-from subprocess import run
 
 
 def eq_(one, other):
@@ -18,13 +17,3 @@ def assert_raises(exccls, msg):
     except Exception as exc:
         assert isinstance(exc, exccls), f"{exc!r} is not a {exccls!r}"
         eq_(str(exc), msg)
-
-
-def is_installed(cmd: tuple[str, ...]) -> bool:
-    try:
-        return run(cmd, check=False).returncode == 0
-    except FileNotFoundError:
-        return False
-
-
-GRAPHVIZ_INSTALLED = is_installed(("dot", "--version"))

tests/test_dotexport.py

@@ -1,11 +1,11 @@
+from shutil import which
+
 from pytest import mark
 from test2ref import assert_refdata
 
 from anytree import Node
 from anytree.dotexport import RenderTreeGraph
 
-from .helper import GRAPHVIZ_INSTALLED
-
 
 def test_tree1(tmp_path):
     """Tree1."""
@@ -53,7 +53,7 @@ def edgeattrfunc(node, child):
     assert_refdata(test_tree2, tmp_path)
 
 
-@mark.skipif(not GRAPHVIZ_INSTALLED, reason="graphviz missing")
+@mark.skipif(which("dot") is None, reason="requires graphviz`s `dot` command")
 def test_tree_png(tmp_path):
     """Tree to png."""
     root = Node("root")