python 练习题
[['A','1'],['B','2'], ['C','3'], ['A','4'], ['B','5'], ['C','6'], ['A','1'], ['B','1'], ['C','1']]分别将这里面的A所对应的数都相加，B所对应的数相加，C所对应的数相加这里面的A,B,C是随机的 有可能下回就是G，H，I了[python]list=[['A','1'],['B','2'], ['C','3'], ['A','4'], ['B','5'], ['C','6'], ['A','1'], ['B','1']]dic={'A':'0','B':'0','C':'0'}print type(dic.get('A'))print type(int(dic.get('A')))#print elem[0],':',(int(dic.get(elem[0]))+int(elem[1]))for elem in list:dic[elem[0]]=str(int(dic.get(elem[0]))+int(elem[1]))print dic
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