Python字典

1.創建字典     A={'key1':'value1','key2','value2',....} 2.訪問元素     A['keyN'] 3.修改元素值     A['keyN']="NewValue" 4.添加鍵-值     A['NewKey']="NewValue" 5.刪除鍵-值     del A['keyN'] 6.遍歷字典     for k,v in A.items():

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