Fix Marker location validation for numpy array (#1647)

Author: Conengmo

folium/map.py

@@ -275,7 +275,7 @@ def __init__(self, location=None, popup=None, tooltip=None, icon=None,
                  draggable=False, **kwargs):
         super(Marker, self).__init__()
         self._name = 'Marker'
-        self.location = validate_location(location) if location else None
+        self.location = validate_location(location) if location is not None else None
         self.options = parse_options(
             draggable=draggable or None,
             autoPan=draggable or None,

tests/test_map.py

@@ -3,7 +3,7 @@
 ----------------
 
 """
-
+import numpy as np
 import pytest
 
 from folium import Map
@@ -148,6 +148,10 @@ def test_marker_valid_location():
         m.render()
 
 
+def test_marker_numpy_array_as_location():
+    Marker(np.array([0, 0]))
+
+
 @pytest.mark.filterwarnings('ignore::UserWarning')
 def test_icon_invalid_marker_colors():
     pytest.warns(UserWarning, Icon, color='lila')