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comparison env/lib/python3.7/site-packages/libfuturize/fixes/fix_UserDict.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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-1:000000000000 0:26e78fe6e8c4
1 """Fix UserDict.
2
3 Incomplete!
4
5 TODO: base this on fix_urllib perhaps?
6 """
7
8
9 # Local imports
10 from lib2to3 import fixer_base
11 from lib2to3.fixer_util import Name, attr_chain
12 from lib2to3.fixes.fix_imports import alternates, build_pattern, FixImports
13
14 MAPPING = {'UserDict': 'collections',
15 }
16
17 # def alternates(members):
18 # return "(" + "|".join(map(repr, members)) + ")"
19 #
20 #
21 # def build_pattern(mapping=MAPPING):
22 # mod_list = ' | '.join(["module_name='%s'" % key for key in mapping])
23 # bare_names = alternates(mapping.keys())
24 #
25 # yield """name_import=import_name< 'import' ((%s) |
26 # multiple_imports=dotted_as_names< any* (%s) any* >) >
27 # """ % (mod_list, mod_list)
28 # yield """import_from< 'from' (%s) 'import' ['(']
29 # ( any | import_as_name< any 'as' any > |
30 # import_as_names< any* >) [')'] >
31 # """ % mod_list
32 # yield """import_name< 'import' (dotted_as_name< (%s) 'as' any > |
33 # multiple_imports=dotted_as_names<
34 # any* dotted_as_name< (%s) 'as' any > any* >) >
35 # """ % (mod_list, mod_list)
36 #
37 # # Find usages of module members in code e.g. thread.foo(bar)
38 # yield "power< bare_with_attr=(%s) trailer<'.' any > any* >" % bare_names
39
40
41 # class FixUserDict(fixer_base.BaseFix):
42 class FixUserdict(FixImports):
43
44 BM_compatible = True
45 keep_line_order = True
46 # This is overridden in fix_imports2.
47 mapping = MAPPING
48
49 # We want to run this fixer late, so fix_import doesn't try to make stdlib
50 # renames into relative imports.
51 run_order = 6
52
53 def build_pattern(self):
54 return "|".join(build_pattern(self.mapping))
55
56 def compile_pattern(self):
57 # We override this, so MAPPING can be pragmatically altered and the
58 # changes will be reflected in PATTERN.
59 self.PATTERN = self.build_pattern()
60 super(FixImports, self).compile_pattern()
61
62 # Don't match the node if it's within another match.
63 def match(self, node):
64 match = super(FixImports, self).match
65 results = match(node)
66 if results:
67 # Module usage could be in the trailer of an attribute lookup, so we
68 # might have nested matches when "bare_with_attr" is present.
69 if "bare_with_attr" not in results and \
70 any(match(obj) for obj in attr_chain(node, "parent")):
71 return False
72 return results
73 return False
74
75 def start_tree(self, tree, filename):
76 super(FixImports, self).start_tree(tree, filename)
77 self.replace = {}
78
79 def transform(self, node, results):
80 import_mod = results.get("module_name")
81 if import_mod:
82 mod_name = import_mod.value
83 new_name = unicode(self.mapping[mod_name])
84 import_mod.replace(Name(new_name, prefix=import_mod.prefix))
85 if "name_import" in results:
86 # If it's not a "from x import x, y" or "import x as y" import,
87 # marked its usage to be replaced.
88 self.replace[mod_name] = new_name
89 if "multiple_imports" in results:
90 # This is a nasty hack to fix multiple imports on a line (e.g.,
91 # "import StringIO, urlparse"). The problem is that I can't
92 # figure out an easy way to make a pattern recognize the keys of
93 # MAPPING randomly sprinkled in an import statement.
94 results = self.match(node)
95 if results:
96 self.transform(node, results)
97 else:
98 # Replace usage of the module.
99 bare_name = results["bare_with_attr"][0]
100 new_name = self.replace.get(bare_name.value)
101 if new_name:
102 bare_name.replace(Name(new_name, prefix=bare_name.prefix))