2 ##########################################################################
4 # Copyright 2011 Jose Fonseca
7 # Permission is hereby granted, free of charge, to any person obtaining a copy
8 # of this software and associated documentation files (the "Software"), to deal
9 # in the Software without restriction, including without limitation the rights
10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 # copies of the Software, and to permit persons to whom the Software is
12 # furnished to do so, subject to the following conditions:
14 # The above copyright notice and this permission notice shall be included in
15 # all copies or substantial portions of the Software.
17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 ##########################################################################/
33 if '__class__' in obj:
35 for name in obj.keys():
36 if name.startswith('__') and name.endswith('__'):
43 def visit(self, node, *args, **kwargs):
44 if isinstance(node, dict):
45 return self.visit_object(node, *args, **kwargs)
46 elif isinstance(node, list):
47 return self.visit_array(node, *args, **kwargs)
49 return self.visit_value(node, *args, **kwargs)
51 def visit_object(self, node, *args, **kwargs):
54 def visit_array(self, node, *args, **kwargs):
57 def visit_value(self, node, *args, **kwargs):
61 class Dumper(Visitor):
63 def __init__(self, stream = sys.stdout):
71 self._write(' '*self.level)
76 def visit_object(self, node):
81 for i in range(len(members)):
84 self.enter_member(name)
91 def enter_object(self):
96 def enter_member(self, name):
98 self._write('%s: ' % name)
100 def leave_member(self):
103 def leave_object(self):
108 def visit_array(self, node):
110 for i in range(len(node)):
119 def enter_array(self):
124 def leave_array(self):
129 def visit_value(self, node):
130 self._write(repr(node))
134 class Comparer(Visitor):
136 def visit_object(self, a, b):
137 if not isinstance(b, dict):
148 if not self.visit(a[k], b[k]):
152 def visit_array(self, a, b):
153 if not isinstance(b, list):
157 for ae, be in zip(a, b):
158 if not self.visit(ae, be):
162 def visit_value(self, a, b):
165 comparer = Comparer()
168 class Differ(Visitor):
170 def __init__(self, stream = sys.stdout):
171 self.dumper = Dumper(stream)
173 def visit(self, a, b):
174 if comparer.visit(a, b):
176 Visitor.visit(self, a, b)
178 def visit_object(self, a, b):
179 if not isinstance(b, dict):
182 self.dumper.enter_object()
183 names = set(a.keys())
184 names.update(b.keys())
189 ae = a.get(name, None)
190 be = b.get(name, None)
191 if not comparer.visit(ae, be):
192 self.dumper.enter_member(name)
194 self.dumper.leave_member()
196 self.dumper.leave_object()
198 def visit_array(self, a, b):
199 if not isinstance(b, list):
202 self.dumper.enter_array()
203 for i in range(max(len(a), len(b))):
212 self.dumper._indent()
213 if comparer.visit(ae, be):
214 self.dumper.visit(ae)
217 self.dumper._newline()
219 self.dumper.leave_array()
221 def visit_value(self, a, b):
225 def replace(self, a, b):
227 self.dumper._write(' -> ')
232 return json.load(stream, strict=False, object_hook = object_hook)
236 a = load(open(sys.argv[1], 'rt'))
237 b = load(open(sys.argv[2], 'rt'))
246 if __name__ == '__main__':