Question

pattern='''

^                     #beginning of string

M{0,3}              # thousands- 0 to 3 MS

(CM|CD|D?C{0,3})    # hundreds - 900 (CM), 400 (CD), 0-300 (0 to 3 Cs), or 500-800 (D, followed by 0 to 3 Cs)

(XC|XL|L?X{0,3})    # tens - 90 (XC), 40 (XL), 0-30 (0 to 3 Xs), or 50-80 (L, followed by 0 to 3 Xs)

(IX|IV|V?I{0,3})    # ones - 9 (IX), 4 (IV), 0-3 (0 to 3 Is), or 5-8 (V, followed by 0 to 3 Is)

$                   #end of string
'''

根据diveintopython3网站和我的逻辑，re.search（模式，＆＃39; M＆＃39;，re.VERBOSE）应该返回字符串匹配，但是当我进入call re时我没有返回。搜索。这是为什么？

Answer 1

它适用于我：

        [global::System.Data.Linq.Mapping.FunctionAttribute(Name="dbo.parseXMLForK12_EachStudent")]
    public ISingleResult<parseXMLForK12_EachStudentResult> parseXMLForK12_EachStudent([global::System.Data.Linq.Mapping.ParameterAttribute(DbType="NVarChar(MAX)")] string strXML, [global::System.Data.Linq.Mapping.ParameterAttribute(DbType="Date")] System.Nullable<System.DateTime> datesaved, [global::System.Data.Linq.Mapping.ParameterAttribute(DbType="Int")] System.Nullable<int> filepassed, [global::System.Data.Linq.Mapping.ParameterAttribute(DbType="Int")] System.Nullable<int> whichproc)
    {
        IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), strXML, datesaved, filepassed, whichproc);
        return ((ISingleResult<parseXMLForK12_EachStudentResult>)(result.ReturnValue));
    }



public partial class parseXMLForK12_EachStudentResult
{

    private System.Nullable<int> _Column1;

    public parseXMLForK12_EachStudentResult()
    {
    }

    [global::System.Data.Linq.Mapping.ColumnAttribute(Name="", Storage="_Column1", DbType="Int")]
    public System.Nullable<int> Column1
    {
        get
        {
            return this._Column1;
        }
        set
        {
            if ((this._Column1 != value))
            {
                this._Column1 = value;
            }
        }
    }
}

也许你感到困惑，因为re.search返回一个“匹配对象”，而不是直接返回匹配的字符串。

为什么这个正则表达式不起作用？它应该基于diveintopython3工作

1 个答案: