soplakanets · January 22, 2010 10:20
diff --git a/correct.py b/correct.py
 def append(value, list = None):
    list = list or []
    list.append(value)
    return list

 print append(1)
 print append(2)
diff --git a/output.txt b/output.txt
 [1]
 [1,2]
diff --git a/wrong.py b/wrong.py
 def append(value, list = []):
    list.append(value)
    return list

 print append(1)
 print append(2)