1  """Fixer for operator functions.
       2  
       3  operator.isCallable(obj)       -> callable(obj)
       4  operator.sequenceIncludes(obj) -> operator.contains(obj)
       5  operator.isSequenceType(obj)   -> isinstance(obj, collections.abc.Sequence)
       6  operator.isMappingType(obj)    -> isinstance(obj, collections.abc.Mapping)
       7  operator.isNumberType(obj)     -> isinstance(obj, numbers.Number)
       8  operator.repeat(obj, n)        -> operator.mul(obj, n)
       9  operator.irepeat(obj, n)       -> operator.imul(obj, n)
      10  """
      11  
      12  import collections.abc
      13  
      14  # Local imports
      15  from lib2to3 import fixer_base
      16  from lib2to3.fixer_util import Call, Name, String, touch_import
      17  
      18  
      19  def invocation(s):
      20      def dec(f):
      21          f.invocation = s
      22          return f
      23      return dec
      24  
      25  
      26  class ESC[4;38;5;81mFixOperator(ESC[4;38;5;149mfixer_baseESC[4;38;5;149m.ESC[4;38;5;149mBaseFix):
      27      BM_compatible = True
      28      order = "pre"
      29  
      30      methods = """
      31                method=('isCallable'|'sequenceIncludes'
      32                       |'isSequenceType'|'isMappingType'|'isNumberType'
      33                       |'repeat'|'irepeat')
      34                """
      35      obj = "'(' obj=any ')'"
      36      PATTERN = """
      37                power< module='operator'
      38                  trailer< '.' %(methods)s > trailer< %(obj)s > >
      39                |
      40                power< %(methods)s trailer< %(obj)s > >
      41                """ % dict(methods=methods, obj=obj)
      42  
      43      def transform(self, node, results):
      44          method = self._check_method(node, results)
      45          if method is not None:
      46              return method(node, results)
      47  
      48      @invocation("operator.contains(%s)")
      49      def _sequenceIncludes(self, node, results):
      50          return self._handle_rename(node, results, "contains")
      51  
      52      @invocation("callable(%s)")
      53      def _isCallable(self, node, results):
      54          obj = results["obj"]
      55          return Call(Name("callable"), [obj.clone()], prefix=node.prefix)
      56  
      57      @invocation("operator.mul(%s)")
      58      def _repeat(self, node, results):
      59          return self._handle_rename(node, results, "mul")
      60  
      61      @invocation("operator.imul(%s)")
      62      def _irepeat(self, node, results):
      63          return self._handle_rename(node, results, "imul")
      64  
      65      @invocation("isinstance(%s, collections.abc.Sequence)")
      66      def _isSequenceType(self, node, results):
      67          return self._handle_type2abc(node, results, "collections.abc", "Sequence")
      68  
      69      @invocation("isinstance(%s, collections.abc.Mapping)")
      70      def _isMappingType(self, node, results):
      71          return self._handle_type2abc(node, results, "collections.abc", "Mapping")
      72  
      73      @invocation("isinstance(%s, numbers.Number)")
      74      def _isNumberType(self, node, results):
      75          return self._handle_type2abc(node, results, "numbers", "Number")
      76  
      77      def _handle_rename(self, node, results, name):
      78          method = results["method"][0]
      79          method.value = name
      80          method.changed()
      81  
      82      def _handle_type2abc(self, node, results, module, abc):
      83          touch_import(None, module, node)
      84          obj = results["obj"]
      85          args = [obj.clone(), String(", " + ".".join([module, abc]))]
      86          return Call(Name("isinstance"), args, prefix=node.prefix)
      87  
      88      def _check_method(self, node, results):
      89          method = getattr(self, "_" + results["method"][0].value)
      90          if isinstance(method, collections.abc.Callable):
      91              if "module" in results:
      92                  return method
      93              else:
      94                  sub = (str(results["obj"]),)
      95                  invocation_str = method.invocation % sub
      96                  self.warning(node, "You should use '%s' here." % invocation_str)
      97          return None