what is the best way to reload the module imported using 'from ...
import ...'

Is following a way to do so?

 >>> from email.charset import Charset
 >>> reload(email.charset)
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
NameError: name 'email' is not defined
 >>>
 >>>
 >>> import email.charset
 >>> reload(email.charset)
<module 'email.charset' from '/usr/lib/python2.5/email/chars

Probably it works but I do not like it as I end up with two namespaces
for the symbol Charset: email.charset.Charset and Charset

here is a terminal 1:

$ cat > a.py
a=1
$ cat > a.py
a=2
$

and terminal 2:

 >>> from a import a
 >>> a
1
 >>> a
1
 >>> from a import a
 >>> a
1
 >>>

- In module "main" call "from A import a"
- Some other part of your code modifies A.a
- You want to have the imported a be refreshed with the value of A.a

No, my suggestion won't help in this situation.

Instead, you can:

(1) Delete the module from sys.modules, forcing Python to re-read it from
disk:

import sys
del sys.modules['A']
from A import a

or

(2) Recognize that Python doesn't specifically support what you're trying
to do. reload() is a convenience function, and you probably should stick
to the "import A; A.a" form.

Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.