Merge pull request #141 from hartym/develop

Develop.

bonobo/_api.py

@@ -2,7 +2,7 @@ import logging
 
 from bonobo.structs import Bag, Graph, Token
 from bonobo.nodes import CsvReader, CsvWriter, FileReader, FileWriter, Filter, JsonReader, JsonWriter, Limit, \
-    PrettyPrinter, PickleWriter, PickleReader, RateLimited, Tee, count, identity, noop
+    PrettyPrinter, PickleWriter, PickleReader, RateLimited, Tee, count, identity, noop, arg0_to_kwargs, kwargs_to_arg0
 from bonobo.strategies import create_strategy
 from bonobo.util.objects import get_name
 
@@ -108,13 +108,15 @@ register_api_group(
     JsonReader,
     JsonWriter,
     Limit,
-    PrettyPrinter,
     PickleReader,
     PickleWriter,
+    PrettyPrinter,
     RateLimited,
     Tee,
+    arg0_to_kwargs,
     count,
     identity,
+    kwargs_to_arg0,
     noop,
 )
 

bonobo/nodes/basics.py

@@ -10,11 +10,13 @@ from bonobo.util.objects import ValueHolder
 from bonobo.util.term import CLEAR_EOL
 
 __all__ = [
-    'identity',
     'Limit',
-    'Tee',
-    'count',
     'PrettyPrinter',
+    'Tee',
+    'arg0_to_kwargs',
+    'count',
+    'identity',
+    'kwargs_to_arg0',
     'noop',
 ]
 
@@ -86,3 +88,25 @@ class PrettyPrinter(Configurable):
 def noop(*args, **kwargs):  # pylint: disable=unused-argument
     from bonobo.constants import NOT_MODIFIED
     return NOT_MODIFIED
+
+
+def arg0_to_kwargs(row):
+    """
+    Transform items in a stream from "arg0" format (each call only has one positional argument, which is a dict-like
+    object) to "kwargs" format (each call only has keyword arguments that represent a row).
+
+    :param row:
+    :return: bonobo.Bag
+    """
+    return Bag(**row)
+
+
+def kwargs_to_arg0(**row):
+    """
+    Transform items in a stream from "kwargs" format (each call only has keyword arguments that represent a row) to
+    "arg0" format (each call only has one positional argument, which is a dict-like object) .
+
+    :param **row:
+    :return: bonobo.Bag
+    """
+    return Bag(row)