Move .python_history to a new location

Signed-off-by: Severin Kaderli <severin.kaderli@gmail.com>

system/.config/python/startup.py

@@ -0,0 +1,20 @@
+import atexit
+import os
+import readline
+
+XDG_DATA_HOME = os.environ["XDG_DATA_HOME"]
+
+if not XDG_DATA_HOME:
+    histfile = os.path.join(os.path.expanduser(
+        "~"), ".local", "share", "python", "history")
+else:
+    histfile = os.path.join(XDG_DATA_HOME, "python", "history")
+
+try:
+    readline.set_auto_history(False)
+    readline.read_history_file(histfile)
+    readline.set_history_length(1000)
+except FileNotFoundError:
+    pass
+
+atexit.register(readline.write_history_file, histfile)