[Python-bugs-list] [ python-Bugs-680789 ] Debug with long array takes forever

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Bugs item #680789, was opened at 2003-02-05 06:00
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https://sourceforge.net/tracker/?func=detail&atid=105470&aid=680789&group_id=5470

Category: Python Library
Group: Python 2.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Jurjen N.E. Bos (jneb)
>Assigned to: Jack Jansen (jackjansen)
Summary: Debug with long array takes forever

Initial Comment:
This is a bug and a partial patch.

If I debug a program that contains a ridiculously large array (8M entries in my case), the debugger takes forever.
It happens in Mac OS X, Python 2.2, but I found the bug in is the repr module, so it is probably universal.
The thing is, that after the fix below, it still doesn't work!
Did I miss something trivial (like repr is builtin, or something like that?). Would someone with Mac OS X experience help out here, please (Jack?).

Here's the diff to make repr.repr work with large arrays:
13a14
>       self.maxarray = 5
50a52,62
>     def repr_array(self, x, level):
>         n = len(x)
>       header = "array('"+x.typecode+"', ["
>         if n == 0: return header+"])"
>         if level <= 0: return header+"...])"
>         s = ''
>         for i in range(min(n, self.maxarray)):
>             if s: s = s + ', '
>             s = s + self.repr1(x[i], level-1)
>         if n > self.maxarray: s = s + ', ...'
>         return header + s + "])"

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>Comment By: Tim Peters (tim_one)
Date: 2003-02-05 13:36

Message:
Logged In: YES 
user_id=31435

Nice to see you, Jurgen!  I checked this into current CVS, 
and it works fine for me in isolation:

>>> len(a)
11055060
>>> repr.repr(a)
"array('i', [0, 1, 2, 3, 4, ...])"
>>>

That goes in an eyeblink.  So more detail is needed about 
what "it still doesn't work!" means.  Assigned to Jack, and he 
can use current CVS to try it.

Lib/repr.py; new revision: 1.15
Lib/test/test_repr.py; new revision: 1.16
Misc/NEWS; new revision: 1.642

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