在方括号中使用替代项时，Python正则表达式子项无法正常工作 Download

我正在尝试使用Python public static IEnumerable<object> CreateClass<T>(this T[,] array) { int rowCount = array.GetLength(0); int columnCount = array.GetLength(1); var fields = array.SliceHeaderRow().ToList(); //convert 1st row to 1d array var properties = fields .Select(f => new DynamicProperty(f, f.GetType())) .ToList(); Type dynoType = DynamicClassFactory.CreateType(properties); object obj = Activator.CreateInstance(dynoType); int jj; for (int ii = 1; ii < rowCount; ii++) //skip first row { jj = 0; foreach (var field in fields) dynoType.GetProperty(field).SetValue(obj, array[ii, jj], null); jj++; yield return obj; } } public static string[] SliceHeaderRow<T>(this T[,] array) { string[] fieldNames = new string[array.GetLength(0) - 1]; for (int jj = 0; jj < array.GetLength(1); jj++) fieldNames[jj] = array[0, jj].ToString(); return fieldNames; }模块将字符串中的日期替换为<Month Year>。

我尝试过：

re

但是它返回：

import re
s = "Wikipedia articles containing buzzwords from April 2014\t23"
s = re.sub(r"[January|April|March]\s+\d{1,4}", "<Month Year>", s)

而不是我所期望的：

'Wikipedia articles containing buzzwords from Apri<Month Year>\t23'

我要去哪里错了？

1 个答案:

答案 0 :(得分：1)

括号表示您需要括号内的其他成员（字符）。试试这个：

s = re.sub(r"(January|April|March)\s+\d{1,4}", "<Month Year>", s)

此处的简单示例：

>>> import re
>>> s = "Wikipedia articles containing buzzwords from April 2014\t23"
>>> s = re.sub(r"(January|April|March)\s+\d{1,4}", "<Month Year>", s)
>>> s
'Wikipedia articles containing buzzwords from <Month Year>\t23'