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75 lines
2.4 KiB
75 lines
2.4 KiB
From 0388a0d2f42401dcedf7f89d3c291cfed3e4a3d5 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
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Date: Wed, 8 Jul 2020 20:15:57 +0200
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Subject: [PATCH 1/2] Adapt dump() behavior to match ast.dump() on Python 3.9+
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In Python 3.9+, ast.dump() omits optional fields/attributes from the output if
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their value is None. Such defaults are defined as class attributes.
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See https://bugs.python.org/issue36287
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And https://github.com/python/cpython/pull/18843
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This patch does not change the output on previous Python versions,
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because the class attributes are missing there.
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Fixes https://github.com/simonpercivall/astunparse/issues/56
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---
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lib/astunparse/printer.py | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/lib/astunparse/printer.py b/lib/astunparse/printer.py
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index 92d64f7..7a33deb 100644
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--- a/lib/astunparse/printer.py
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+++ b/lib/astunparse/printer.py
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@@ -4,6 +4,9 @@
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import six
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+_NOPE = object()
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+
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+
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class Printer(ast.NodeVisitor):
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def __init__(self, file=sys.stdout, indent=" "):
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@@ -19,6 +22,7 @@ def write(self, text):
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self.f.write(six.text_type(text))
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def generic_visit(self, node):
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+ cls = type(node)
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if isinstance(node, list):
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nodestart = "["
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@@ -27,7 +31,8 @@ def generic_visit(self, node):
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else:
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nodestart = type(node).__name__ + "("
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nodeend = ")"
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- children = [(name + "=", value) for name, value in ast.iter_fields(node)]
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+ children = [(name + "=", value) for name, value in ast.iter_fields(node)
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+ if not (value is None and getattr(cls, name, _NOPE) is None)]
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if len(children) > 1:
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self.indentation += 1
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From ea2b578a1b653e73696db2392b8e3d5bf75dadc7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
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Date: Wed, 8 Jul 2020 20:21:17 +0200
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Subject: [PATCH 2/2] Test and support Python 3.9
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---
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setup.py | 1 +
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tox.ini | 2 +-
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2 files changed, 2 insertions(+), 1 deletion(-)
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diff --git a/setup.py b/setup.py
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index e5a277a..29b384b 100755
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--- a/setup.py
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+++ b/setup.py
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@@ -52,6 +52,7 @@ def read_version():
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'Programming Language :: Python :: 3.6',
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'Programming Language :: Python :: 3.7',
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'Programming Language :: Python :: 3.8',
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+ 'Programming Language :: Python :: 3.9',
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'Topic :: Software Development :: Code Generators',
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],
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test_suite='tests',
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