How do you find if the user defined modules are imported?

This tries to see if it is imported ("-" is for easier to read):

Code:
Loaded modules:  

- tokenize:  LPAR,PseudoToken,ENDMARKER  
- heapq:  sort,izip,_nlargest  
- __future__:  __module__,getMandatoryRelease,division  
- copy_reg:  _inverted_registry,_slotnames,__all__  
- sre_compile:  _optimize_unicode,isstring,_sre
...