摘要:
S.find(substring,[start[end]])#可指范围查找子串,返回索引值,否则返回-1例如>>>b = 'abcd'>>> b.find('d')3>>> b.find('d',2,4)3>>> b.find('d',3,4)3>>> b.find('d',2,3)-1可见当指定范... 阅读全文
摘要:
| append(...)| L.append(object) -- append object to end| | count(...)| L.count(value) -> integer -- return number of occurrences of value| | extend(..... 阅读全文