Configure Visualizations (#365)

* make viz types configurable

* make visualizations configurable

* deault every viz is true

* add blacklist viz_type

* fix build

caravel/config.py

@@ -121,6 +121,15 @@
 CACHE_DEFAULT_TIMEOUT = None
 CACHE_CONFIG = {'CACHE_TYPE': 'null'}
 
+
+# ---------------------------------------------------
+# List of viz_types not allowed in your environment
+# For example: Blacklist pivot table and treemap:
+#  VIZ_TYPE_BLACKLIST = ['pivot_table', 'treemap']
+# ---------------------------------------------------
+
+VIZ_TYPE_BLACKLIST = []
+
 try:
     from caravel_config import *  # noqa
 except Exception:

caravel/viz.py

@@ -14,7 +14,6 @@
 import uuid
 from collections import OrderedDict, defaultdict
 from datetime import datetime, timedelta
-
 import pandas as pd
 import numpy as np
 from flask import flash, request, Markup
@@ -1540,4 +1539,5 @@ def get_data(self):
     TreemapViz,
 ]
 
-viz_types = OrderedDict([(v.viz_type, v) for v in viz_types_list])
+viz_types = OrderedDict([(v.viz_type, v) for v in viz_types_list
+                         if v.viz_type not in config.get('VIZ_TYPE_BLACKLIST')])