python: fix pdb history

python/.pdb_startup.py

@@ -0,0 +1,17 @@
+import atexit
+import os
+
+try:
+    import readline
+    historyPath = os.path.expanduser("~/.pdb_history")
+    readline.clear_history()
+    if os.path.exists(historyPath):
+        readline.read_history_file(historyPath)
+
+    def save_history(historyPath=historyPath):
+        import readline
+        readline.write_history_file(historyPath)
+
+    atexit.register(save_history)
+except ImportError:
+    pass