摘要：Given a string containing just the characters'('and')', find the length of the longest valid (well-formed) parentheses substring.For"(()", the longest... 阅读全文

摘要：Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express... 阅读全文

摘要：今天学习廖老师的python教程，碰到了修饰符'@'，不太了解，查看了下官方文档。简单的整理下：@dec2@dec1def func(arg1, arg2, ...): pass　等价于def func(arg1, arg2, ...): passfunc = dec2(dec1(fun... 阅读全文