Update Docs and DataReader Wrapper

Author: hydrosquall

docs/source/remote_data.rst

@@ -202,15 +202,18 @@ Available expiry dates can be accessed from the ``expiry_dates`` property.
 Enigma
 ======
 
-Access datasets from `Enigma <https://app.enigma.io>`__,
+Access datasets from `Enigma <https://public.enigma.com>`__,
 the world's largest repository of structured public data.
 
+Datasets are unique identified by the ``uuid4`` at the end of a dataset's web address.
+For example, the following code downloads USDA Food Recall Data from https://public.enigma.com/datasets/292129b0-1275-44c8-a6a3-2a0881f24fe1.
+
 .. ipython:: python
 
     import os
     import pandas_datareader as pdr
 
-    df = pdr.get_data_enigma('enigma.trade.ams.toxic.2015', os.getenv('ENIGMA_API_KEY'))
+    df = pdr.get_data_enigma('292129b0-1275-44c8-a6a3-2a0881f24fe1', os.getenv('ENIGMA_API_KEY'))
     df.columns
 
 .. _remote_data.quandl:

pandas_datareader/data.py

@@ -137,7 +137,7 @@ def DataReader(name, data_source=None, start=None, end=None,
                                  session=session).read()
 
     elif data_source == "enigma":
-        return EnigmaReader(datapath=name, api_key=access_key).read()
+        return EnigmaReader(dataset_id=name, api_key=access_key).read()
 
     elif data_source == "fred":
         return FredReader(symbols=name, start=start, end=end,

pandas_datareader/enigma.py

@@ -56,9 +56,8 @@ def __init__(self,
 
         self._dataset_id = dataset_id
         if not isinstance(self._dataset_id, compat.string_types):
-            # TODO: test if string is valid UUID
             raise ValueError(
-                "The Enigma dataset_id must be a UUID4 string (ex: "
+                "The Enigma dataset_id must be a string (ex: "
                 "'bedaf052-5fcd-4758-8d27-048ce8746c6a')")
 
         headers = {
@@ -106,7 +105,7 @@ def get_current_snapshot_id(self, dataset_id):
 
     def get_dataset_metadata(self, dataset_id):
         """Get the Dataset Model of this EnigmaReader's dataset
-            <Add Link to Model Docs>
+            https://docs.public.enigma.com/resources/dataset/index.html
         """
         url = "datasets/{0}?row_limit=0".format(dataset_id)
         response = self._get(url)

pandas_datareader/tests/test_enigma.py

@@ -12,9 +12,9 @@
 class TestEnigma(object):
 
     @property
-    def dataset_id():
+    def dataset_id(self):
         """
-        USDA Food Recall Archive
+        USDA Food Recall Archive - 1996
         Selected for being a relatively small dataset.
         https://public.enigma.com/datasets/292129b0-1275-44c8-a6a3-2a0881f24fe1
         """