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-rw-r--r--lib/python2.7/lib2to3/fixes/fix_operator.py96
1 files changed, 96 insertions, 0 deletions
diff --git a/lib/python2.7/lib2to3/fixes/fix_operator.py b/lib/python2.7/lib2to3/fixes/fix_operator.py
new file mode 100644
index 0000000..7bf2c0d
--- /dev/null
+++ b/lib/python2.7/lib2to3/fixes/fix_operator.py
@@ -0,0 +1,96 @@
+"""Fixer for operator functions.
+
+operator.isCallable(obj) -> hasattr(obj, '__call__')
+operator.sequenceIncludes(obj) -> operator.contains(obj)
+operator.isSequenceType(obj) -> isinstance(obj, collections.Sequence)
+operator.isMappingType(obj) -> isinstance(obj, collections.Mapping)
+operator.isNumberType(obj) -> isinstance(obj, numbers.Number)
+operator.repeat(obj, n) -> operator.mul(obj, n)
+operator.irepeat(obj, n) -> operator.imul(obj, n)
+"""
+
+# Local imports
+from lib2to3 import fixer_base
+from lib2to3.fixer_util import Call, Name, String, touch_import
+
+
+def invocation(s):
+ def dec(f):
+ f.invocation = s
+ return f
+ return dec
+
+
+class FixOperator(fixer_base.BaseFix):
+ BM_compatible = True
+ order = "pre"
+
+ methods = """
+ method=('isCallable'|'sequenceIncludes'
+ |'isSequenceType'|'isMappingType'|'isNumberType'
+ |'repeat'|'irepeat')
+ """
+ obj = "'(' obj=any ')'"
+ PATTERN = """
+ power< module='operator'
+ trailer< '.' %(methods)s > trailer< %(obj)s > >
+ |
+ power< %(methods)s trailer< %(obj)s > >
+ """ % dict(methods=methods, obj=obj)
+
+ def transform(self, node, results):
+ method = self._check_method(node, results)
+ if method is not None:
+ return method(node, results)
+
+ @invocation("operator.contains(%s)")
+ def _sequenceIncludes(self, node, results):
+ return self._handle_rename(node, results, u"contains")
+
+ @invocation("hasattr(%s, '__call__')")
+ def _isCallable(self, node, results):
+ obj = results["obj"]
+ args = [obj.clone(), String(u", "), String(u"'__call__'")]
+ return Call(Name(u"hasattr"), args, prefix=node.prefix)
+
+ @invocation("operator.mul(%s)")
+ def _repeat(self, node, results):
+ return self._handle_rename(node, results, u"mul")
+
+ @invocation("operator.imul(%s)")
+ def _irepeat(self, node, results):
+ return self._handle_rename(node, results, u"imul")
+
+ @invocation("isinstance(%s, collections.Sequence)")
+ def _isSequenceType(self, node, results):
+ return self._handle_type2abc(node, results, u"collections", u"Sequence")
+
+ @invocation("isinstance(%s, collections.Mapping)")
+ def _isMappingType(self, node, results):
+ return self._handle_type2abc(node, results, u"collections", u"Mapping")
+
+ @invocation("isinstance(%s, numbers.Number)")
+ def _isNumberType(self, node, results):
+ return self._handle_type2abc(node, results, u"numbers", u"Number")
+
+ def _handle_rename(self, node, results, name):
+ method = results["method"][0]
+ method.value = name
+ method.changed()
+
+ def _handle_type2abc(self, node, results, module, abc):
+ touch_import(None, module, node)
+ obj = results["obj"]
+ args = [obj.clone(), String(u", " + u".".join([module, abc]))]
+ return Call(Name(u"isinstance"), args, prefix=node.prefix)
+
+ def _check_method(self, node, results):
+ method = getattr(self, "_" + results["method"][0].value.encode("ascii"))
+ if callable(method):
+ if "module" in results:
+ return method
+ else:
+ sub = (unicode(results["obj"]),)
+ invocation_str = unicode(method.invocation) % sub
+ self.warning(node, u"You should use '%s' here." % invocation_str)
+ return None