Lazy compilation of regex

sebastinas · sebastinas · commit 3ab27eb68acf · 2015-01-29T16:09:15.000+01:00
Signed-off-by: Sebastian Ramacher &lt;sebastian+dev@ramacher.at&gt;
diff --git a/bpython/autocomplete.py b/bpython/autocomplete.py
@@ -455,12 +455,17 @@ def safe_eval(expr, namespace):
         raise EvaluationError
 
 
-attr_matches_re = re.compile(r"(\w+(\.\w+)*)\.(\w*)")
+attr_matches_re = None
+
 
 def attr_matches(text, namespace):
     """Taken from rlcompleter.py and bent to my will.
     """
 
+    global attr_matches_re
+    if attr_matches_re is None:
+        attr_matches_re = re.compile(r"(\w+(\.\w+)*)\.(\w*)")
+
     # Gna, Py 2.6's rlcompleter searches for __call__ inside the
     # instance instead of the type, so we monkeypatch to prevent
     # side-effects (__getattr__/__getattribute__)
