add do_where

docs/source/whatsnew/pr/do_where.rst

@@ -0,0 +1,47 b''
+IPython debugger (IPdb) now supports the number of context lines for the
+``where`` (and ``w``) commands. The `context` keyword is also available in various APIs.
+
+.. code::
+
+    In [2]: def foo():
+    ...:     1
+    ...:     2
+    ...:     3
+    ...:     4
+    ...:     5
+    ...:     raise ValueError('6 is not acceptable')
+    ...:     7
+    ...:     8
+    ...:     9
+    ...:     10
+    ...:
+
+    In [3]: foo()
+    ----------------------------------------------------
+    ValueError         Traceback (most recent call last)
+    <ipython-input-3> in <module>()
+    ----> 1 foo()
+
+    <ipython-input-2> in foo()
+        5     4
+        6     5
+    ----> 7     raise ValueError('6 is not acceptable')
+        8     7
+        9     8
+
+    ValueError: 6 is not acceptable
+
+    In [4]: debug
+    > <ipython-input-2>(7)foo()
+        5     4
+        6     5
+    ----> 7     raise ValueError('6 is not acceptable')
+        8     7
+        9     8
+
+    ipdb> where 1
+    <ipython-input-3>(1)<module>()
+    ----> 1 foo()
+
+    > <ipython-input-2>(7)foo()
+    ----> 7     raise ValueError('6 is not acceptable')

docs/source/whatsnew/development.rst

@@ -10,6 +10,7 b' This document describes in-flight development work.'
     conflicts for other Pull Requests). Instead, create a new file in the
     `docs/source/whatsnew/pr` folder
 
+
 .. DO NOT EDIT THIS LINE BEFORE RELEASE. FEATURE INSERTION POINT.
 
 
@@ -18,4 +19,3 b' Backwards incompatible changes'
 
 
 .. DO NOT EDIT THIS LINE BEFORE RELEASE. INCOMPAT INSERTION POINT.
-

tools/update_whatsnew.py

@@ -7,6 +7,7 b' whatsnew/development.rst (chronologically ordered), and deletes the snippets.'
 
 import io
 import os
+from glob import glob
 from os.path import dirname, basename, abspath, join as pjoin
 from subprocess import check_call, check_output
 
@@ -20,15 +21,15 b' INCOMPAT_MARK = ".. DO NOT EDIT THIS LINE BEFORE RELEASE. INCOMPAT INSERTION POI'
 
 # 1. Collect the whatsnew snippet files ---------------------------------------
 
-files = set(os.listdir(pr_dir))
+files = set()
+for f in glob(pjoin(pr_dir, '*.rst')):
+    files.add(f)
 # Ignore explanatory and example files
-files.difference_update({'README.md',
+files.difference_update({pjoin(pr_dir, f) for f in {'README.md',
                          'incompat-switching-to-perl.rst',
                          'antigravity-feature.rst'}
-                        )
+                         })
 
-# Absolute paths
-files = {pjoin(pr_dir, f) for f in files}
 
 def getmtime(f):
     return check_output(['git', 'log', '-1', '--format="%ai"', '--', f])
@@ -38,7 +39,11 b' files = sorted(files, key=getmtime)'
 features, incompats = [], []
 for path in files:
     with io.open(path, encoding='utf-8') as f:
-        content = f.read().rstrip()
+        try:
+            content = f.read().rstrip()
+        except Exception as e:
+            raise Exception('Error reading "{}"'.format(f))
+
     if basename(path).startswith('incompat-'):
         incompats.append(content)
     else:
@@ -72,4 +77,4 b' for file in files:'
 
 check_call(['git', 'add', target])
 
-print("Merged what's new changes. Check the diff and commit the change.")
  No newline at end of file
+print("Merged what's new changes. Check the diff and commit the change.")