bug fixes and documentation

README.md

@@ -4,12 +4,13 @@ This project implements an abstraction of objects that can have access to a vari
 
 # Why Use Data-Transport ?
 
-Mostly data scientists that don't really care about the underlying database and would like a simple and consistent way to read/write data and have will be well served. Additionally we implemented lightweight Extract Transform Loading API and command line (CLI) tool.
+Mostly data scientists that don't really care about the underlying database and would like a simple and consistent way to read/write and move data are well served. Additionally we implemented lightweight Extract Transform Loading API and command line (CLI) tool. Finally it is possible to add pre/post processing pipeline functions to read/write
 
 1. Familiarity with **pandas data-frames**
 2. Connectivity **drivers** are included
 3. Mining data from various sources
-4. Useful for data migrations or ETL
+4. Useful for data migrations or **ETL**
+
 
 ## Installation
 

transport/iowrapper.py

@@ -6,9 +6,9 @@ class IO:
     """
     Base wrapper class for read/write
     """
-    def __init__(self,_agent,loader):
+    def __init__(self,_agent,plugins):
         self._agent = _agent
-        self._loader = loader
+        self._plugins = plugins
     def meta (self,**_args):
         if hasattr(self._agent,'meta') :
             return self._agent.meta(**_args)
@@ -21,7 +21,7 @@ class IO:
         """
         applying pre/post conditions given a pipeline expression
         """
-        for _pointer in self._loader :
+        for _pointer in self._plugins :
             _data = _pointer(_data)
     def apply(self,_query):
         if hasattr(self._agent,'apply') :
@@ -32,8 +32,8 @@ class IReader(IO):
         super().__init__(_agent,pipeline)
     def read(self,**_args):
         _data = self._agent.read(**_args)
-        if self._loader and self._loader.ratio() > 0 :
+        if self._plugins and self._plugins.ratio() > 0 :
-            _data = self._loader.apply(_data)
+            _data = self._plugins.apply(_data)
         #
         # output data 
         return _data
@@ -41,7 +41,7 @@ class IWriter(IO):
     def __init__(self,_agent,pipeline=None):
         super().__init__(_agent,pipeline)  
     def write(self,_data,**_args):
-        if self._loader and self._loader.ratio() > 0 :
+        if self._plugins and self._plugins.ratio() > 0 :
-            _data = self._loader.apply(_data)
+            _data = self._plugins.apply(_data)
 
         self._agent.write(_data,**_args)