python编程中的if __name__ == 'main': 的作用和原理 原文链接:http://www.dengfeilong.com/post/60.html 在大多数编排得好一点的脚本或者程序里面都有这段if __name__ == 'main': ,虽然一直知道他的作用,但是一直比较模糊,收集资料详细理解之后与打架分享。 1、这段代码的功能 &...猜你喜欢python...
plusminus The plusminus package provides a ready-to-run arithmetic parser and evaluator, based on pyparsing's infix_notation helper method. Strings containing 6-function arithmetic expressions can be parsed and evaluated using the ArithmeticParser: from plusminus import BaseArithmeticParser parser = Bas...
By default, Python supports neither pre-increments (like ++x) nor post-increments (like x++). However, the first ones are syntactically correct since Python parses them as two subsequent +x operations, where + is the unary plus operator (same with --x and the unary minus). They both ...
MTM plus matrix addition Calling Sequence Parameters Description Examples Calling Sequence plus( M1 , M2 ) Parameters M1 - array M2 - array Description The plus(M1,M2) function performs matrix addition of M1 + M2 . If M1 is a scalar, then M1 is added...
Python Numpy 2d array slicing minus index to plus index数字和形状是相同的，但strides不同（一个是...
GridView column with plus minus button sign for Quantity Gridview columns fixed to header size GridView custom Edit button... Gridview filter like excel in asp.net Gridview filter using jquery ajax without postback in asp.net GridView Fixed Header issue: cannot get header with to set same as ...
MySQL Add and subtract time-function-time plus minusThis article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied...
(EMD-1408), microtubule minus-end in presence of Mal3 (EMD-14109), microtubule plus-end in absence of additional proteins (EMD-14106), microtubule minus-end in absence of additional proteins (EMD-14107), Tip1, Tea2 and Mal3 in presence of PEG without microtubules or tubulin (EMD-14112)...
减号(单目运算符) Minus sign (unary operator): - 布尔操作( Boolean operations ) 二元运算符(Binary operators): and, or 布尔否定(一元运算符): !, not 比较和等价 (Comparisons and equality) 比较( Comparators ) : >, <, >=, <= (gt, lt, ge, le) ...
*/minute */hour */day * /mouth *.week day command eg: 21:30 every day implenment this command: 30 21 * * * cmd1 45 1 * * 6,0 cmd2(sun or surtday) 0,30 20-23 * * * cmd4(20:00-23:00 every 30 minus) * */1 * * * (every hour )...