Add decimal to float adapter to at least prevent crash on decimal. Fix #172

CHANGELOG

@@ -1,3 +1,6 @@
+V 1.6.1
+	Fix Decimal incompatibility
+
 V 1.6.0
 	Adds config option missing_value_fill_truncation. (thanks sirlark)
 	Avoid HTTP 301 Moved Permanently (thanks jean)

pygal/__init__.py

@@ -21,7 +21,7 @@ Pygal -  A python svg graph plotting library
 
 """
 
-__version__ = '1.6.0'
+__version__ = '1.6.1'
 import sys
 from pygal.config import Config
 from pygal.ghost import Ghost, REAL_CHARTS

pygal/adapters.py

@@ -22,7 +22,7 @@ Value adapters to use when a chart doesn't accept all value types
 """
 import datetime
 from numbers import Number
-from pygal.i18n import COUNTRIES
+from decimal import Decimal
 
 
 def positive(x):
@@ -52,3 +52,9 @@ def date(x):
         except OverflowError:
             return None
     return x
+
+
+def decimal_to_float(x):
+    if isinstance(x, Decimal):
+        return float(x)
+    return x

pygal/graph/frenchmap.py

@@ -193,7 +193,6 @@ class FrenchMapDepartments(Graph):
     kind = 'departement'
     svg_map = DPT_MAP
 
-
     @cached_property
     def _values(self):
         """Getter for series values (flattened)"""

pygal/test/__init__.py

@@ -22,15 +22,15 @@ from pygal.util import cut
 from datetime import datetime
 from pygal.i18n import COUNTRIES
 from pygal.graph.frenchmap import DEPARTMENTS, REGIONS
-
+from decimal import Decimal
 
 def get_data(i):
     return [
         [(-1, 1), (2, 0), (0, 4)],
         [(0, 1), (None, 2), (3, 2)],
         [(-3, 3), (1, 3), (1, 1)],
-        [(1, 1), (1, 1), (1, 1)],
-        [(3, 2), (2, 1), (1, 1)]][i]
+        [(1, 1), (Decimal('1.'), 1), (1, 1)],
+        [(3, 2), (2, 1), (1., 1)]][i]
 
 
 def adapt(chart, data):
@@ -46,14 +46,23 @@ def adapt(chart, data):
 
     data = cut(data)
     if isinstance(chart, pygal.Worldmap):
-        return list(map(lambda x: list(COUNTRIES.keys())[x % len(COUNTRIES)]
-                        if x is not None else None, data))
+        return list(
+            map(lambda x: list(
+                COUNTRIES.keys())[
+                    int(x) % len(COUNTRIES)]
+                if x is not None else None, data))
     elif isinstance(chart, pygal.FrenchMap_Regions):
-        return list(map(lambda x: list(REGIONS.keys())[x % len(REGIONS)]
-                    if x is not None else None, data))
+        return list(
+            map(lambda x: list(
+                REGIONS.keys())[
+                    int(x) % len(REGIONS)]
+                if x is not None else None, data))
     elif isinstance(chart, pygal.FrenchMap_Departments):
-        return list(map(lambda x: list(DEPARTMENTS.keys())[x % len(DEPARTMENTS)]
-                    if x is not None else None, data))
+        return list(
+            map(lambda x: list(
+                DEPARTMENTS.keys())[
+                    int(x) % len(DEPARTMENTS)]
+                if x is not None else None, data))
     return data
 
 

pygal/test/test_graph.py

@@ -132,7 +132,6 @@ def test_empty_lists_with_nones(Chart):
     q = chart.render_pyquery()
     assert len(q(".legend")) == 2
 
-
 def test_non_iterable_value(Chart):
     chart = Chart(no_prefix=True)
     chart.add('A', 1)

pygal/util.py

@@ -27,7 +27,7 @@ from decimal import Decimal
 from math import floor, pi, log, log10, ceil
 from itertools import cycle
 from functools import reduce
-from pygal.adapters import not_zero, positive
+from pygal.adapters import not_zero, positive, decimal_to_float
 ORDERS = u("yzafpnµm kMGTPEZY")
 
 
@@ -346,6 +346,7 @@ def prepare_values(raw, config, cls, offset=0):
             if fun in adapters:
                 adapters.remove(fun)
         adapters = adapters + [positive, not_zero]
+    adapters = adapters + [decimal_to_float]
     adapter = reduce(compose, adapters) if not config.strict else ident
     series = []