added classmethod for accessing the class by namestring

1 files changed, 7 insertions, 0 deletions

diff --git a/ricky/params/__init__.py b/ricky/params/__init__.py
index a48f681..53ac530 100644
--- a/ricky/params/__init__.py
+++ b/ricky/params/__init__.py
@@ -119,6 +119,13 @@ class Params(object):
             if param.name in params_dict.keys():
                 param.value = params_dict[param.name]
 
+    @classmethod
+    def from_classname(cls, classname):
+        for subclass in cls.__subclasses__():
+            if subclass.__name__ == classname:
+                return subclass()
+        return None
+
 from ricky.params.pbgradient import PbGradient
 from ricky.params.pbbreaker import PbBreaker
 from ricky.params.pbpattern import PbPattern