[Python-checkins] r73530 - in python/branches/release26-maint: Lib/pydoc.py Lib/test/test_pydoc.py Misc/ACKS Misc/NEWS

[r.david.murray]

Author: r.david.murray
Date: Tue Jun 23 22:37:26 2009
New Revision: 73530

Log:
Merged revisions 73529 via svnmerge from 
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r73529 | r.david.murray | 2009-06-23 14:02:46 -0400 (Tue, 23 Jun 2009) | 4 lines
  
  Fix issue 5230 by having pydoc's safeimport check to see if the import
  error was thrown from itself in order to decide if the module can't be
  found.  Thanks to Lucas Prado Melo for collaborating on the fix and tests.
........


Modified:
   python/branches/release26-maint/   (props changed)
   python/branches/release26-maint/Lib/pydoc.py
   python/branches/release26-maint/Lib/test/test_pydoc.py
   python/branches/release26-maint/Misc/ACKS
   python/branches/release26-maint/Misc/NEWS

Modified: python/branches/release26-maint/Lib/pydoc.py
==============================================================================
--- python/branches/release26-maint/Lib/pydoc.py	(original)
+++ python/branches/release26-maint/Lib/pydoc.py	Tue Jun 23 22:37:26 2009
@@ -55,6 +55,7 @@
 import sys, imp, os, re, types, inspect, __builtin__, pkgutil
 from repr import Repr
 from string import expandtabs, find, join, lower, split, strip, rfind, rstrip
+from traceback import extract_tb
 try:
     from collections import deque
 except ImportError:
@@ -299,9 +300,9 @@
         elif exc is SyntaxError:
             # A SyntaxError occurred before we could execute the module.
             raise ErrorDuringImport(value.filename, info)
-        elif exc is ImportError and \
-             split(lower(str(value)))[:2] == ['no', 'module']:
-            # The module was not found.
+        elif exc is ImportError and extract_tb(tb)[-1][2]=='safeimport':
+            # The import error occurred directly in this function,
+            # which means there is no such module in the path.
             return None
         else:
             # Some other error occurred during the importing process.

Modified: python/branches/release26-maint/Lib/test/test_pydoc.py
==============================================================================
--- python/branches/release26-maint/Lib/test/test_pydoc.py	(original)
+++ python/branches/release26-maint/Lib/test/test_pydoc.py	Tue Jun 23 22:37:26 2009
@@ -1,5 +1,6 @@
 import sys
 import os
+import os.path
 import difflib
 import subprocess
 import re
@@ -7,6 +8,8 @@
 import inspect
 import unittest
 import test.test_support
+from contextlib import contextmanager
+from test.test_support import TESTFN, forget, rmtree, EnvironmentVarGuard
 
 from test import pydoc_mod
 
@@ -166,6 +169,9 @@
 # output pattern for missing module
 missing_pattern = "no Python documentation found for '%s'"
 
+# output pattern for module with bad imports
+badimport_pattern = "problem in %s - <type 'exceptions.ImportError'>: No module named %s"
+
 def run_pydoc(module_name, *args):
     """
     Runs pydoc on the specified module. Returns the stripped
@@ -237,6 +243,43 @@
         self.assertEqual(expected, result,
             "documentation for missing module found")
 
+    def test_badimport(self):
+        # This tests the fix for issue 5230, where if pydoc found the module
+        # but the module had an internal import error pydoc would report no doc
+        # found.
+        modname = 'testmod_xyzzy'
+        testpairs = (
+            ('i_am_not_here', 'i_am_not_here'),
+            ('test.i_am_not_here_either', 'i_am_not_here_either'),
+            ('test.i_am_not_here.neither_am_i', 'i_am_not_here.neither_am_i'),
+            ('i_am_not_here.{0}'.format(modname), 'i_am_not_here.{0}'.format(modname)),
+            ('test.{0}'.format(modname), modname),
+            )
+
+        @contextmanager
+        def newdirinpath(dir):
+            os.mkdir(dir)
+            sys.path.insert(0, dir)
+            yield
+            sys.path.pop(0)
+            rmtree(dir)
+
+        with newdirinpath(TESTFN):
+            with EnvironmentVarGuard() as env:
+                env.set('PYTHONPATH', TESTFN)
+                fullmodname = os.path.join(TESTFN, modname)
+                sourcefn = fullmodname + os.extsep + "py"
+                for importstring, expectedinmsg in testpairs:
+                    f = open(sourcefn, 'w')
+                    f.write("import {0}\n".format(importstring))
+                    f.close()
+                    try:
+                        result = run_pydoc(modname)
+                    finally:
+                        forget(modname)
+                    expected = badimport_pattern % (modname, expectedinmsg)
+                    self.assertEqual(expected, result)
+
     def test_input_strip(self):
         missing_module = " test.i_am_not_here "
         result = run_pydoc(missing_module)

Modified: python/branches/release26-maint/Misc/ACKS
==============================================================================
--- python/branches/release26-maint/Misc/ACKS	(original)
+++ python/branches/release26-maint/Misc/ACKS	Tue Jun 23 22:37:26 2009
@@ -464,6 +464,7 @@
 Craig McPheeters
 Lambert Meertens
 Bill van Melle
+Lucas Prado Melo
 Luke Mewburn
 Mike Meyer
 Steven Miale

Modified: python/branches/release26-maint/Misc/NEWS
==============================================================================
--- python/branches/release26-maint/Misc/NEWS	(original)
+++ python/branches/release26-maint/Misc/NEWS	Tue Jun 23 22:37:26 2009
@@ -56,6 +56,10 @@
 Library
 -------
 
+- Issue #5230: pydoc would report no documentation found if a module generated
+  a 'not found' import error when loaded; it now reports the import errors.
+  Thanks to Lucas Prado Melo for initial fix and collaboration on the tests.
+
 - Issue #6274: Fixed possible file descriptors leak in subprocess.py
 
 - Issue #6271: mmap tried to close invalid file handle (-1) when annonymous.