擅长:python、mysql、java
<h3><a href="http://docs.python.org/library/sys.html#sys.builtin_module_names">^{<cd1>}</a></h3>
<blockquote>
<p>A tuple of strings giving the names of
all modules that are compiled into
this Python interpreter. (This
information is not available in any
other way — modules.keys() only lists
the imported modules.)</p>
</blockquote>