added style argument to the add_picture method, the pictures can now be centered

Author: Benjamin-T

docx/document.py

@@ -213,7 +213,7 @@ def add_caption(self, caption, bmark, obj_type='figure'):
         self.create_caption(caption, par,  obj_type, bmark)
         return par
 
-    def add_picture(self, image_path_or_stream, width=None, height=None):
+    def add_picture(self, image_path_or_stream, width=None, height=None, style=None):
         """
         Return a new picture shape added in its own paragraph at the end of
         the document. The picture contains the image at
@@ -226,7 +226,10 @@ def add_picture(self, image_path_or_stream, width=None, height=None):
         in the image file, defaulting to 72 dpi if no value is specified, as
         is often the case.
         """
-        run = self.add_paragraph().add_run()
+        if style is not None:
+            run = self.add_paragraph(style=style).add_run()
+        else:
+            run = self.add_paragraph().add_run()
         return run.add_picture(image_path_or_stream, width, height)
 
     def add_section(self, start_type=WD_SECTION.NEW_PAGE):