Change list like check (which did not worked in python 3)

pygal/_compat.py

@@ -17,7 +17,7 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
 import sys
-
+from collections import Iterable
 
 if sys.version_info[0] == 3:
     base = (str, bytes)
@@ -27,8 +27,16 @@ else:
     coerce = unicode
 
 
+def is_list_like(value):
+    return isinstance(value, Iterable) and not isinstance(value, (base, dict))
+
+
+def is_str(string):
+    return isinstance(string, base)
+
+
 def to_str(string):
-    if not isinstance(string, base):
+    if not is_str(string):
         return coerce(string)
     return string
 

pygal/ghost.py

@@ -27,7 +27,7 @@ from __future__ import division
 import io
 import sys
 from pygal.config import Config
-from pygal._compat import u
+from pygal._compat import u, is_list_like
 from pygal.graph import CHARTS_NAMES
 from pygal.util import prepare_values
 from uuid import uuid4
@@ -63,7 +63,7 @@ class Ghost(object):
 
     def add(self, title, values, secondary=False):
         """Add a serie to this graph"""
-        if not hasattr(values, '__iter__') and not isinstance(values, dict):
+        if not is_list_like(values):
             values = [values]
         if secondary:
             self.raw_series2.append((title, values))

pygal/util.py

@@ -21,7 +21,7 @@ Various utils
 
 """
 from __future__ import division
-from pygal._compat import to_str, u
+from pygal._compat import to_str, u, is_list_like
 import re
 from decimal import Decimal
 from math import floor, pi, log, log10, ceil
@@ -355,13 +355,13 @@ def prepare_values(raw, config, cls):
             if issubclass(cls, Histogram):
                 if value is None:
                     value = (None, None, None)
-                elif not hasattr(value, '__iter__'):
+                elif not is_list_like(value):
                     value = (value, config.zero, config.zero)
                 value = list(map(adapter, value))
             elif cls._dual:
                 if value is None:
                     value = (None, None)
-                elif not hasattr(value, '__iter__'):
+                elif not is_list_like(value):
                     value = (value, config.zero)
                 if issubclass(cls, DateY) or issubclass(cls, Worldmap):
                     value = (adapter(value[0]), value[1])
@@ -369,7 +369,6 @@ def prepare_values(raw, config, cls):
                     value = list(map(adapter, value))
             else:
                 value = adapter(value)
-
             values.append(value)
         series.append(Serie(title, values, metadata))
     return series