Error, this is with the full file

gistfile1.txt

>>> from datetime import datetime
>>> import project
>>> project.build_request_url('IBM', datetime.today(), datetime.today())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "project.py", line 41, in build_request_url
    'e' : end_date.day,
ValueError: unsupported format character '&' (0x26) at index 53