Example:
here are Set-Cookie list:
```python
sclst = ['dwac_bcIBMiaagZmkYaaadeYtg11eVR=j9jHdmPjUhgDOhyH9f89X4lQgehEmflVyeA%3D|dw-only|||CNY|false|Asia%2FShanghai|true; Path=/',
'sid=j9jHdmPjUhgDOhyH9f89X4lQgehEmflVyeA; Path=/',
'geoLocation=CN; Path=/',
'dwpersonalization_fae107a9dd0fc32ed99532ec1977f31f=bc8sEiaagZqRsaaadk8XoNTL8h20150506; Expires=Sun, 14-Jun-2015 10:37:07 GMT; Path=/',
'dwanonymous_fae107a9dd0fc32ed99532ec1977f31f=abjpA8kng31LjPp8ZEERDT4XVg; Version=1; Comment="Demandware anonymous cookie for site Sites-abercrombie_cn-Site"; Max-Age=15552000; Expires=Tue, 10-Nov-2015 10:37:07 GMT; Path=/',
'myStore=91156; Path=/',
'AF_PREF=en_CN; Path=/',
'dwsid=MiHJy3KYZKDcN0lZg4HS1zSpj1VV4s_tFu39ar0KXNpAx9aX8X2LlvZQ9m5fOOknb6QXtmmukHcOjmivYf31hg==; path=/; HttpOnly']
```
```python
for sc in sclst:
C = Cookie.SimpleCookie(sc)
for morsel in C.values():
cookie = requests.cookies.morsel_to_cookie(morsel)
cookiejar.set_cookie(cookie)
```
Then, exception occured
```shell
File "/Library/Python/2.7/site-packages/requests/cookies.py", line 402, in morsel_to_cookie
expires = time.time() + morsel['max-age']
TypeError: unsupported operand type(s) for +: 'float' and 'str'
```
As Cookie.SimpleCookie is in STL, should `morsel_to_cookie` check the type of `max-age`? On the other hand, if **max-age** can not be converted to float, it's illegal obviously.
Many people expect to be able to say:
response = make_request(url)
if response:
body = response.content
Where the first part should test for whether or not response is None.
Instead, the __bool__ and __nonzero__ methods return response.ok, so if
the response is actually a 4xx or 5xx response, then the user would
expect to get the body of the response.
By removing these methods, we restore the functionality that most users
expect.
Closes#2002
Cory Benfield
kennethreitz