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.
When a PreparedRequests's cookie jar is not a RequestsCookieJar instance, it
will not have a "copy" method. By adding _copy_cookie_jar we can reliably copy
cookie jars so that we have an actual copy instead of the same instance on
different prepared requests.
This also updates the RequestsCookieJar.update logic to create copies of
cookies from the other jar.
Closes#2527
Per discussion with @sigmavirus24, we'll take the less cowardly approach here.
"the RFC defines the Expires header as a string with the format we're assigning to ``time_template`` so checking if it is a string is unnecessary."
Crossing my fingers that this doesn't break anyones existing code...
morsel_to_cookie(mosel) method raise TypeError: create_cookie() got unexpected keyword arguments: ['path_specified', 'domain_specified', 'port_specified', 'domain_initial_dot'].
so we should remove these param from create_cookie(...)
kennethreitz
Thomas Grainger