摘要： 方法 描述s.captitalize() 首字符边大写s.center(witdh [,pad]) 在长度为width的字段内将字符串居中，pad是填充字符s.count(sub,[,start [,end]]) 计算指定字符串sub出现的次数s.decode([encoding [,errors] 阅读全文

摘要： 标识符保留字 and del from　nonlocal try as elif golbal not while assert else if or with break except import pass yield class exec in print continue finally i 阅读全文