This fix makes, eg, 'pydoc time' work again.

Merged revisions 72605 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r72605 | r.david.murray | 2009-05-13 13:14:11 -0400 (Wed, 13 May 2009) | 3 lines

  Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
  file is a binary.  Patch by Brodie Rao, test by Daniel Diniz.
........

Lib/inspect.py

@@ -518,7 +518,9 @@ def findsource(object):
     or code object.  The source code is returned as a list of all the lines
     in the file and the line number indexes a line in that list.  An IOError
     is raised if the source code cannot be retrieved."""
-    file = getsourcefile(object) or getfile(object)
+    file = getsourcefile(object)
+    if not file:
+        raise IOError('source code not available')
     module = getmodule(object, file)
     if module:
         lines = linecache.getlines(file, module.__dict__)

Lib/test/test_inspect.py

@@ -11,6 +11,9 @@ from test.support import TESTFN, run_unittest
 from test import inspect_fodder as mod
 from test import inspect_fodder2 as mod2
 
+# C module for test_findsource_binary
+import time
+
 # Functions tested in this suite:
 # ismodule, isclass, ismethod, isfunction, istraceback, isframe, iscode,
 # isbuiltin, isroutine, isgenerator, isgeneratorfunction, getmembers,
@@ -336,6 +339,10 @@ class TestBuggyCases(GetSourceBase):
     def test_method_in_dynamic_class(self):
         self.assertSourceEqual(mod2.method_in_dynamic_class, 95, 97)
 
+    def test_findsource_binary(self):
+        self.assertRaises(IOError, inspect.getsource, time)
+        self.assertRaises(IOError, inspect.findsource, time)
+
 # Helper for testing classify_class_attrs.
 def attrs_wo_objs(cls):
     return [t[:3] for t in inspect.classify_class_attrs(cls)]

Misc/ACKS

@@ -171,6 +171,7 @@ Raghuram Devarakonda
 Toby Dickenson
 Mark Dickinson
 Jack Diederich
+Daniel Diniz
 Humberto Diogenes
 Yves Dionne
 Daniel Dittmar
@@ -581,6 +582,7 @@ Eduardo P
 Brian Quinlan
 Anders Qvist
 Burton Radons
+Brodie Rao
 Antti Rasinen
 Eric Raymond
 Edward K. Ream

Misc/NEWS

@@ -23,6 +23,10 @@ Core and Builtins
 Library
 -------
 
+- Issue #4050: inspect.findsource/getsource now raise an IOError if the 'source'
+  file is a binary.  Patch by Brodie Rao, tests by Daniel Diniz.  This fix
+  corrects a pydoc regression.
+
 - Issue 5955: aifc's close method did not close the file it wrapped,
   now it does.  This also means getfp method now returns the real fp.