Remove Pydb integration as Pydb is unmaintained and not ion PyPI

Closes # 9482

docs/source/whatsnew/pr/incompat-remove-pydb.rst

@@ -0,0 +1,1 b''
+Integration with pydb has been removed since pydb development has been stopped since 2012, and pydb is not installable from PyPI

IPython/core/completer.py

@@ -657,8 +657,7 b' class IPCompleter(Completer):'
 
     def all_completions(self, text):
         """
-        Wrapper around the complete method for the benefit of emacs
-        and pydb.
+        Wrapper around the complete method for the benefit of emacs.
         """
         return self.complete(text)[1]
 

IPython/core/debugger.py

@@ -37,25 +37,10 b' from IPython.utils import coloransi, py3compat'
 from IPython.core.excolors import exception_colors
 from IPython.testing.skipdoctest import skip_doctest
 
-# See if we can use pydb.
-has_pydb = False
 prompt = 'ipdb> '
+
 #We have to check this directly from sys.argv, config struct not yet available
-if '--pydb' in sys.argv:
-    try:
-        import pydb
-        if hasattr(pydb.pydb, "runl") and pydb.version>'1.17':
-            # Version 1.17 is broken, and that's what ships with Ubuntu Edgy, so we
-            # better protect against it.
-            has_pydb = True
-    except ImportError:
-        print("Pydb (http://bashdb.sourceforge.net/pydb/) does not seem to be available")
-
-if has_pydb:
-    from pydb import Pdb as OldPdb
-    prompt = 'ipydb> '
-else:
-    from pdb import Pdb as OldPdb
+from pdb import Pdb as OldPdb
 
 # Allow the set_trace code to operate outside of an ipython instance, even if
 # it does so with some limitations.  The rest of this support is implemented in
@@ -220,14 +205,9 b' class Pdb(OldPdb):'
         except (TypeError, ValueError):
                 raise ValueError("Context must be a positive integer")
 
-        if has_pydb and completekey is None:
-            OldPdb.__init__(self,stdin=stdin,stdout=sys.stdout)
-        else:
-            OldPdb.__init__(self,completekey,stdin,stdout)
+        OldPdb.__init__(self,completekey,stdin,stdout)
 
         # IPython changes...
-        self.is_pydb = has_pydb
-
         self.shell = get_ipython()
 
         if self.shell is None:
@@ -236,26 +216,6 b' class Pdb(OldPdb):'
                 TerminalInteractiveShell
             self.shell = TerminalInteractiveShell.instance()
 
-        if self.is_pydb:
-
-            # interactiveshell.py's ipalias seems to want pdb's checkline
-            # which located in pydb.fn
-            import pydb.fns
-            self.checkline = lambda filename, lineno: \
-                             pydb.fns.checkline(self, filename, lineno)
-
-            self.curframe = None
-            self.do_restart = self.new_do_restart
-
-            self.old_all_completions = self.shell.Completer.all_completions
-            self.shell.Completer.all_completions=self.all_completions
-
-            self.do_list = decorate_fn_with_doc(self.list_command_pydb,
-                                                OldPdb.do_list)
-            self.do_l     = self.do_list
-            self.do_frame = decorate_fn_with_doc(self.new_do_frame,
-                                                 OldPdb.do_frame)
-
         self.aliases = {}
 
         # Create color table: we copy the default one from the traceback
@@ -482,12 +442,6 b' class Pdb(OldPdb):'
         return tpl_line % (bp_mark_color + bp_mark, num, line)
 
 
-    def list_command_pydb(self, arg):
-        """List command to use if we have a newer pydb installed"""
-        filename, first, last = OldPdb.parse_list_cmd(self, arg)
-        if filename is not None:
-            self.print_list_lines(filename, first, last)
-
     def print_list_lines(self, filename, first, last):
         """The printing (as opposed to the parsing part of a 'list'
         command."""

IPython/core/interactiveshell.py

@@ -31,7 +31,7 b' from io import open as io_open'
 from pickleshare import PickleShareDB
 
 from traitlets.config.configurable import SingletonConfigurable
-from IPython.core import debugger, oinspect
+from IPython.core import oinspect
 from IPython.core import magic
 from IPython.core import page
 from IPython.core import prefilter
@@ -974,7 +974,7 b' class InteractiveShell(SingletonConfigurable):'
                         'Control auto-activation of pdb at exceptions')
 
     def debugger(self,force=False):
-        """Call the pydb/pdb debugger.
+        """Call the pdb debugger.
 
         Keywords:
 
@@ -991,15 +991,9 b' class InteractiveShell(SingletonConfigurable):'
             error('No traceback has been produced, nothing to debug.')
             return
 
-        # use pydb if available
-        if debugger.has_pydb:
-            from pydb import pm
-        else:
-            # fallback to our internal debugger
-            pm = lambda : self.InteractiveTB.debugger(force=True)
 
         with self.readline_no_record:
-            pm()
+            self.InteractiveTB.debugger(force=True)
 
     #-------------------------------------------------------------------------
     # Things related to IPython's various namespaces

IPython/core/shellapp.py

@@ -22,7 +22,7 b' from IPython.utils import py3compat'
 from IPython.utils.contexts import preserve_keys
 from IPython.utils.path import filefind
 from traitlets import (
-    Unicode, Instance, List, Bool, CaselessStrEnum, default, observe,
+    Unicode, Instance, List, Bool, CaselessStrEnum, observe,
 )
 from IPython.lib.inputhook import guis
 
@@ -50,14 +50,6 b" addflag('pdb', 'InteractiveShell.pdb',"
     "Enable auto calling the pdb debugger after every exception.",
     "Disable auto calling the pdb debugger after every exception."
 )
-# pydb flag doesn't do any config, as core.debugger switches on import,
-# which is before parsing.  This just allows the flag to be passed.
-shell_flags.update(dict(
-    pydb = ({},
-        """Use the third party 'pydb' package as debugger, instead of pdb.
-        Requires that pydb is installed."""
-    )
-))
 addflag('pprint', 'PlainTextFormatter.pprint',
     "Enable auto pretty printing of results.",
     "Disable auto pretty printing of results."
@@ -321,7 +313,7 b' class InteractiveShellApp(Configurable):'
     def _exec_file(self, fname, shell_futures=False):
         try:
             full_filename = filefind(fname, [u'.', self.ipython_dir])
-        except IOError as e:
+        except IOError:
             self.log.warning("File not found: %r"%fname)
             return
         # Make sure that the running script gets a proper sys.argv as if it