How to check for retcode when perform stdout redirect

[ela34]

I want to do something like this:

• downloading a file by redirecting curl output to the file and checking curl retcode

I have try this syntax, and I'm probably doing something wrong, but I cannot find out the correct way to achieve this.

(curl('https://www.mysite.com/file', retcode=0) > 'file.txt')()

This version is working:
(curl['https://www.mysite.com/file'] > 'file.txt')()

Any help greatly appreciated.
Thanks.

[ASMfreaK]

Retcode is already checked by plumbum. In example you've given. If retcode is not 0 then a ProcessExecutionError is raised

(curl['https://www.mysite.com/file'] > 'file.txt')()
---------------------------------------------------------------------------
ProcessExecutionError                     Traceback (most recent call last)
<ipython-input-44-d25eb1cb8cba> in <module>()
----> 1 (curl['https://www.mysite.com/file'] > 'file.txt')()
...(Traceback omitted)...
ProcessExecutionError: Command line: ['/usr/bin/curl', 'https://www.mysite.com/file']
Exit code: 7
Stderr:  |   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
         |                                  Dload  Upload   Total   Spent    Left  Speed
         | 
         |   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
         |   0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
         |   0     0    0     0    0     0      0      0 --:--:--  0:00:02 --:--:--     0
         |   0     0    0     0    0     0      0      0 --:--:--  0:00:03 --:--:--     0
         |   0     0    0     0    0     0      0      0 --:--:--  0:00:04 --:--:--     0
         |   0     0    0     0    0     0      0      0 --:--:--  0:00:05 --:--:--     0
curl: (7) Failed to connect to www.mysite.com port 443: В соединении отказано