Question

我试图使用python

将字符串与以下不同的组合进行匹配

（这里x是长度为4的数字）

W|MON-FRI|xxxx-xxxx 
W|mon-fri|xxxx-xxxx
W|MON-THU,SAT|xxxx-xxxx
W|mon-thu,sat|xxxx-xxxx
W|MON|xxxx-xxxx

这里的第一部分和最后一部分是静态的，第二部分可以是如上所示的任何组合，就像有时候用“，”或“ - ”分隔天。

我是正则表达式的新手，我在Google上搜索正则表达式的工作方式，我能够为比特＆amp;以上表达式的部分，例如将最后一部分与re.compile('(\d{4})-(\d{4})$')匹配，第一部分与re.compile('[w|W]')匹配。

我试图匹配第二部分，但无法用

成功

new_patt = re.compile('(([a-zA-Z]{3}))([,-]?)(([a-zA-Z]{3})?))

我怎样才能做到这一点？

Answer 1

你可以一气呵成：

^W\|(?:\w{3}[-,]){0,2}\w{3}\|(?:\d{4}[-]?){2}$

使用 Live Demo

Answer 2

这是一个应该有效的正则表达式：

pat = re.compile('^W\|(mon|tue|wed|thu|fri|sat|sun)(-(mon|tue|wed|thu|fri|sat|sun))?(,(mon|tue|wed|thu|fri|sat|sun)(-(mon|tue|wed|thu|fri|sat|sun))?)?\⎪\d{4}-\d{4}$', re.IGNORECASE)

首先请注意如何忽略案例来处理大小写的情况。除了开头的静态文本和结尾的数字，此正则表达式匹配一周中的某一天，然后是一周中的可选短划线+一天，然后是包含,的可选序列和上一个序列。

"^W\|(mon|tue|wed|thu|fri|sat|sun)(-(mon|tue|wed|thu|fri|sat|sun))?(,(mon|tue|wed|thu|fri|sat|sun)(-(mon|tue|wed|thu|fri|sat|sun))?)?\|\d{4}-\d{4}$"i
    ^ assert position at start of the string
    W matches the character W literally (case insensitive)
    \| matches the character | literally
    1st Capturing group (mon|tue|wed|thu|fri|sat|sun)
    2nd Capturing group (-(mon|tue|wed|thu|fri|sat|sun))?
        Quantifier: ? Between zero and one time, as many times as possible, giving back as needed [greedy]
        Note: A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data
        - matches the character - literally
        3rd Capturing group (mon|tue|wed|thu|fri|sat|sun)
    4th Capturing group (,(mon|tue|wed|thu|fri|sat|sun)(-(mon|tue|wed|thu|fri|sat|sun))?)?
        Quantifier: ? Between zero and one time, as many times as possible, giving back as needed [greedy]
        Note: A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data
        , matches the character , literally
        5th Capturing group (mon|tue|wed|thu|fri|sat|sun)
        6th Capturing group (-(mon|tue|wed|thu|fri|sat|sun))?
            Quantifier: ? Between zero and one time, as many times as possible, giving back as needed [greedy]
            Note: A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data
            - matches the character - literally
            7th Capturing group (mon|tue|wed|thu|fri|sat|sun)
    \| matches the character | literally
    \d{4} match a digit [0-9]
        Quantifier: {4} Exactly 4 times
    - matches the character - literally
    \d{4} match a digit [0-9]
        Quantifier: {4} Exactly 4 times
    $ assert position at end of the string
    i modifier: insensitive. Case insensitive match (ignores case of [a-zA-Z])

https://regex101.com/r/dW4dQ7/1

Answer 3

感谢您的帖子和评论，

最后，我能够用正则表达式满足我的要求这是

“^ [W | W] \ |（周一|太阳|周五|周四|坐在|结婚|周二| [0-6]）（ - （周一|周五|坐在|太阳|结婚|周四|周二| [0-6]））（，（星期一|星期五|坐|太阳|星期三|星期四|星期二| [0-6]））* \ |？（\ d {4} - \ d {4}）$ “IMG

我刚刚调整了Julien Spronck发布的答案

再次感谢所有

正则表达式用于匹配具有不同组合的字符串

3 个答案: