System:win7+python34.
class Contact(object):
def __init__(self, first_name=None, last_name=None,
display_name=None, email=None):
self.first_name = first_name
self.last_name = last_name
self.display_name = display_name
self.email = email
def print_info(self):
print(self.display_name, "<" + self.email + ">" )
def set_email(self, value):
if '@' not in value:
raise Exception("This doesn't look like an email address.")
self._email = value
def get_email(self):
return self._email
email = property(get_email, set_email)
contact = Contact()
The error message is :
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 7, in __init__
File "<stdin>", line 11, in set_email
TypeError: argument of type 'NoneType' is not iterable
What is wrong with the code?
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