Feature added by Harri Pasanen (at my suggestion): .py suffix on

filename may be omitted.

diff --git a/Lib/pdb.py b/Lib/pdb.py
index 2824f4c22d3969e2a248538b0f1e81dd5b30353a..f7462a900ff2ba298378a95822d2acebc9c88d04 100755 (executable)
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -421,19 +421,21 @@ class Pdb(bdb.Bdb, cmd.Cmd):
 
        The line number may be prefixed with a filename and a colon,
        to specify a breakpoint in another file (probably one that
-       hasn't been loaded yet).  The file is searched on sys.path."""
+       hasn't been loaded yet).  The file is searched on sys.path;
+       the .py suffix may be omitted."""
 
        def help_clear(self):
                self.help_cl()
 
        def help_cl(self):
-               print """cl(ear) [lineno]
+               print """cl(ear) [file:][lineno]
        With a line number argument, clear that break in the current file.
        Without argument, clear all breaks (but first ask confirmation).
 
        The line number may be prefixed with a filename and a colon,
        to specify a breakpoint in another file (probably one that
-       hasn't been loaded yet).  The file is searched on sys.path."""
+       hasn't been loaded yet).  The file is searched on sys.path;
+       the .py suffix may be omitted."""
 
        def help_step(self):
                self.help_s()
@@ -517,6 +519,11 @@ class Pdb(bdb.Bdb, cmd.Cmd):
        def lookupmodule(self, filename):
                if filename == mainmodule:
                        return mainpyfile
+               root, ext = os.path.splitext(filename)
+               if ext == '':
+                       filename = filename + '.py'
+               if os.path.isabs(filename):
+                       return filename
                for dirname in sys.path:
                        fullname = os.path.join(dirname, filename)
                        if os.path.exists(fullname):