Use %{ %} instead of { } after %pythoncode

Simpler and safer change to address PR#357.

Lib/python/pyabc.i

@@ -1,7 +1,7 @@
 %define %pythonabc(Type, Abc)
   %feature("python:abc", #Abc) Type;
 %enddef
-%pythoncode {import collections};
+%pythoncode %{import collections%}
 %pythonabc(std::vector, collections.MutableSequence);
 %pythonabc(std::list, collections.MutableSequence);
 %pythonabc(std::map, collections.MutableMapping);

Lib/python/pycontainer.swg

@@ -710,8 +710,8 @@ namespace swig
 #if defined(SWIGPYTHON_BUILTIN)
   %feature("python:slot", "tp_iter", functype="getiterfunc") iterator;
 #else
-  %pythoncode {def __iter__(self):
-    return self.iterator()}
+  %pythoncode %{def __iter__(self):
+    return self.iterator()%}
 #endif
   }
 

Lib/python/pyiterators.swg

@@ -344,8 +344,8 @@ namespace swig
   %feature("python:slot", "tp_iternext", functype="iternextfunc") SwigPyIterator::__next__;
 #else
   %extend SwigPyIterator {
-  %pythoncode {def __iter__(self):
-    return self}
+  %pythoncode %{def __iter__(self):
+    return self%}
   }
 #endif
 

Lib/python/std_map.i

@@ -176,14 +176,14 @@
 
 #else
   %extend {
-    %pythoncode {def __iter__(self):
-    return self.key_iterator()}    
-    %pythoncode {def iterkeys(self):
-    return self.key_iterator()}
-    %pythoncode {def itervalues(self):
-    return self.value_iterator()}
-    %pythoncode {def iteritems(self):
-    return self.iterator()}
+    %pythoncode %{def __iter__(self):
+    return self.key_iterator()%}
+    %pythoncode %{def iterkeys(self):
+    return self.key_iterator()%}
+    %pythoncode %{def itervalues(self):
+    return self.value_iterator()%}
+    %pythoncode %{def iteritems(self):
+    return self.iterator()%}
   }
 #endif
 

Lib/python/std_pair.i

@@ -176,7 +176,7 @@ SwigPython_std_pair_setitem (PyObject *a, Py_ssize_t b, PyObject *c)
 %define %swig_pair_methods(pair...)
 #if !defined(SWIGPYTHON_BUILTIN)
 %extend {      
-%pythoncode {def __len__(self):
+%pythoncode %{def __len__(self):
     return 2
 def __repr__(self):
     return str((self.first, self.second))
@@ -189,7 +189,7 @@ def __setitem__(self, index, val):
     if not (index % 2):
         self.first = val
     else:
-        self.second = val}
+        self.second = val%}
 }
 #endif
 %enddef

Lib/python/std_unordered_map.i

@@ -231,14 +231,14 @@
       return swig::make_output_value_iterator(self->begin(), self->begin(), self->end(), *PYTHON_SELF);
     }
 
-    %pythoncode {def __iter__(self):
-    return self.key_iterator()}    
-    %pythoncode {def iterkeys(self):
-    return self.key_iterator()}
-    %pythoncode {def itervalues(self):
-    return self.value_iterator()}
-    %pythoncode {def iteritems(self):
-    return self.iterator()}
+    %pythoncode %{def __iter__(self):
+    return self.key_iterator()%}
+    %pythoncode %{def iterkeys(self):
+    return self.key_iterator()%}
+    %pythoncode %{def itervalues(self):
+    return self.value_iterator()%}
+    %pythoncode %{def iteritems(self):
+    return self.iterator()%}
   }
 %enddef