# [PYTHON MATRIX-SIG] Re: may be a bug

**Tser-Yuan (Brian) Yang
**
tbyang@icf.llnl.gov

*Fri, 21 Jun 1996 16:04:27 -0700 (PDT)*

Brian Yang wrote:
>* The following may have been posted or even corrected. If so, I apologize
*>* for sending junk mail.
*
>* >>> from Numeric import *
*>* >>> a=array((1,2))
*>* >>> import sys
*>* >>> sys.getrefcount(a)
*>* 2
*>* >>> a
*>* 1 2
*>* >>> sys.getrefcount(a)
*>* 5
*>* >>> b=1
*>* >>> sys.getrefcount(a)
*>* 4
*
First, I should correct myself:
sys.getrefcount(a) should still be 5 after b=1, since assignment does not
return a value.
Some experiment showed that the extra reference counts are held by
something in ArrayPrinter.py, because I commented out the following line
in numeric.py:
#from ArrayPrinter import arrayToString
#set_print_function(arrayToString)
and it hehaves like the following
>>>* from Numeric import *
*>>>* a=array((1,3))
*>>>* a
*array([1,3], 'l')
>>>* import sys
*>>>* sys.getrefcount(a)
*3
>>>* 1
*1
>>>* sys.getrefcount(a)
*2
Brian Yang
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