Added inspect() command

src/core/sheerka/services/SheerkaFilter.py

@@ -296,8 +296,8 @@ class SheerkaFilter(BaseService):
     #             s.send(data)
 
     @staticmethod
-    def pipe_traverse(args):
-        for arg in args:
+    def pipe_traverse(iterable):
+        for arg in iterable:
             try:
                 if isinstance(arg, str):
                     yield arg
@@ -342,7 +342,7 @@ class SheerkaFilter(BaseService):
             yield item
 
     @staticmethod
-    def pipe_write(iterable, fname, glue="\n"):
+    def pipe_to_file(iterable, fname, glue="\n"):
         with open(fname, "w") as f:
             for item in iterable:
                 f.write(str(item) + glue)
@@ -432,3 +432,13 @@ class SheerkaFilter(BaseService):
                     yield item
             except NameError:
                 pass
+
+    def pipe_inspect(self, iterable, path, when=None):
+        compiled = self.get_compiled("inspect", path)
+        for item in iterable:
+            try:
+                context = {} if is_primitive(item) else as_bag(item)
+                context["self"] = item
+                yield eval(compiled, context)
+            except Exception as ex:
+                yield ex