Is there any way to solve this?
Here is my code. a is successfully added to reading list, but not b or c.

# coding: utf-8
import webbrowser

a = 'http://example.com/a'
b = 'http://example.com/あ'
c = 'http://example.com/%e3%81%82'

for n in [a, b, c]:
    webbrowser.add_to_reading_list(n)