[680789] Debug with long array takes forever

Added array.array to the types repr.py knows about, after a suggestion
from Jurjen N.E. Bos.

Lib/repr.py

@@ -7,6 +7,7 @@ class Repr:
         self.maxlevel = 6
         self.maxtuple = 6
         self.maxlist = 6
+        self.maxarray = 5
         self.maxdict = 4
         self.maxstring = 30
         self.maxlong = 40
@@ -48,6 +49,23 @@ class Repr:
             s = s + self.repr1(x[i], level-1)
         if n > self.maxlist: s = s + ', ...'
         return '[' + s + ']'
+
+    def repr_array(self, x, level):
+        n = len(x)
+        header = "array('%s', [" % 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 += self.repr1(x[i], level-1)
+        if n > self.maxarray:
+            s += ', ...'
+        return header + s + "])"
+
     def repr_dict(self, x, level):
         n = len(x)
         if n == 0: return '{}'

Lib/test/test_repr.py

@@ -34,6 +34,8 @@ class ReprTests(unittest.TestCase):
         eq(r(s), expected)
 
     def test_container(self):
+        from array import array
+
         eq = self.assertEquals
         # Tuples give up after 6 elements
         eq(r(()), "()")
@@ -56,6 +58,16 @@ class ReprTests(unittest.TestCase):
         d['arthur'] = 1
         eq(r(d), "{'alice': 1, 'arthur': 1, 'bob': 2, 'charles': 3, ...}")
 
+        # array.array after 5.
+        eq(r(array('i')), "array('i', [])")
+        eq(r(array('i', [1])), "array('i', [1])")
+        eq(r(array('i', [1, 2])), "array('i', [1, 2])")
+        eq(r(array('i', [1, 2, 3])), "array('i', [1, 2, 3])")
+        eq(r(array('i', [1, 2, 3, 4])), "array('i', [1, 2, 3, 4])")
+        eq(r(array('i', [1, 2, 3, 4, 5])), "array('i', [1, 2, 3, 4, 5])")
+        eq(r(array('i', [1, 2, 3, 4, 5, 6])),
+                   "array('i', [1, 2, 3, 4, 5, ...])")
+
     def test_numbers(self):
         eq = self.assertEquals
         eq(r(123), repr(123))

Misc/NEWS

@@ -145,6 +145,9 @@ Extension modules
 Library
 -------
 
+- array.array was added to the types repr.py knows about (see
+  <http://www.python.org/sf/680789>).
+
 - The new pickletools.py contains lots of documentation about pickle
   internals, and supplies some helpers for working with pickles, such as
   a symbolic pickle disassembler.