Add snippets for all major Python debuggers

Author: r-darwish

snippets/python-mode/ipdb

@@ -0,0 +1,6 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: ipdb trace
+# key: ipdb
+# group: debug
+# --
+import ipdb; ipdb.set_trace()

snippets/python-mode/pdb

@@ -0,0 +1,6 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: pdb trace
+# key: pdb
+# group: debug
+# --
+import pdb; pdb.set_trace()

snippets/python-mode/pudb

@@ -0,0 +1,6 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: pudb trace
+# key: pudb
+# group: debug
+# --
+import pudb; pu.db