Issue #23502: The pprint module now supports mapping proxies.
In particular the __dict__ attributes of building types.
diff --git a/Lib/pprint.py b/Lib/pprint.py
index 5b65f57..9031a0b 100644
--- a/Lib/pprint.py
+++ b/Lib/pprint.py
@@ -36,6 +36,7 @@
import re
import sys as _sys
+import types as _types
from collections import OrderedDict as _OrderedDict
from io import StringIO as _StringIO
@@ -313,6 +314,14 @@
_dispatch[bytearray.__repr__] = _pprint_bytearray
+ def _pprint_mappingproxy(self, object, stream, indent, allowance, context, level):
+ stream.write('mappingproxy(')
+ self._format(object.copy(), stream, indent + 13, allowance + 1,
+ context, level)
+ stream.write(')')
+
+ _dispatch[_types.MappingProxyType.__repr__] = _pprint_mappingproxy
+
def _format_dict_items(self, items, stream, indent, allowance, context,
level):
write = stream.write
diff --git a/Lib/test/test_pprint.py b/Lib/test/test_pprint.py
index 50d7d59..3a798d9 100644
--- a/Lib/test/test_pprint.py
+++ b/Lib/test/test_pprint.py
@@ -7,6 +7,7 @@
import random
import collections
import itertools
+import types
# list, tuple and dict subclasses that do or don't overwrite __repr__
class list2(list):
@@ -271,6 +272,34 @@
'a': 6,
'lazy': 7,
'dog': 8}""")
+
+ def test_mapping_proxy(self):
+ words = 'the quick brown fox jumped over a lazy dog'.split()
+ d = dict(zip(words, itertools.count()))
+ m = types.MappingProxyType(d)
+ self.assertEqual(pprint.pformat(m), """\
+mappingproxy({'a': 6,
+ 'brown': 2,
+ 'dog': 8,
+ 'fox': 3,
+ 'jumped': 4,
+ 'lazy': 7,
+ 'over': 5,
+ 'quick': 1,
+ 'the': 0})""")
+ d = collections.OrderedDict(zip(words, itertools.count()))
+ m = types.MappingProxyType(d)
+ self.assertEqual(pprint.pformat(m), """\
+mappingproxy({'the': 0,
+ 'quick': 1,
+ 'brown': 2,
+ 'fox': 3,
+ 'jumped': 4,
+ 'over': 5,
+ 'a': 6,
+ 'lazy': 7,
+ 'dog': 8})""")
+
def test_subclassing(self):
o = {'names with spaces': 'should be presented using repr()',
'others.should.not.be': 'like.this'}