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12 changes: 7 additions & 5 deletions pptx/slide.py
Original file line number Diff line number Diff line change
Expand Up @@ -367,9 +367,11 @@ def name_to_attr(name, instance):
and then checks if the name is valid identifier
and it is available for given instance.
"""
new_name = name.title().replace(' ', '')
if new_name.isidentifier() and not hasattr(instance, new_name):
return new_name
from .compat import is_string
if is_string(name):
new_name = name.title().replace(' ', '')
if new_name.isidentifier() and not hasattr(instance, new_name):
return new_name

available_layouts = []
for layout_id in self._sldLayoutIdLst:
Expand All @@ -380,8 +382,8 @@ def name_to_attr(name, instance):
attr_name = name_to_attr(layout_name, self)
if attr_name:
setattr(self, attr_name, layout)
if not hasattr(self, 'available_layouts'):
setattr(self, 'available_layouts', available_layouts)
if available_layouts and not hasattr(self, 'available_layouts'):
setattr(self, 'available_layouts', available_layouts)


class SlideMaster(_BaseMaster):
Expand Down