close
from collections import Counterdata = ['a','2',2,4,5,'2','b',4,7,'a',5,'d','a','z']c = Counter(data)print c.keys()print c.has_key('a')#python3.0移除 改用 if 'a' in c :print (c.get('a'))['a', 2, 'b', 4, 5, 7, '2', 'z', 'd']
True
3
以前用list.count('a')簡直是個錯誤!
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