F
test_modify_contact.py:4 (test_modify_contact_first_name)
app = <fixture.application.Application object at 0x032B7030>

    def test_modify_contact_first_name(app):
            app.session.login(username="admin", password="secret")
>           app.contact.modify_first_contact(Contact(first_name="New first name"))

test_modify_contact.py:7:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
..\fixture\contact.py:73: in modify_first_contact
    self.fill_contact_form(new_contact_data)
..\fixture\contact.py:19: in fill_contact_form
    self.add_avatar(contact)
..\fixture\contact.py:57: in add_avatar
    wd.find_element_by_name("photo").send_keys(contact.avatar)
..\env\lib\site-packages\selenium\webdriver\remote\webelement.py:351: in send_keys
    {'text': "".join(keys_to_typing(value)),
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

value = (None,)

    def keys_to_typing(value):
        """Processes the values that will be typed in the element."""
        typing = []
        for val in value:
            if isinstance(val, Keys):
                typing.append(val)
            elif isinstance(val, int):
                val = str(val)
                for i in range(len(val)):
                    typing.append(val[i])
            else:
>               for i in range(len(val)):
E               TypeError: object of type 'NoneType' has no len()

..\env\lib\site-packages\selenium\webdriver\common\utils.py:150: TypeError