如何使用xlwings装饰器编写自己的装饰器来创建Excel UDF

Question

我想编写自己的装饰器，使用xlwings装饰器在Excel中创建UDF。但是，当我导入我的函数时，导入的函数名称是装饰器内部函数名称。

澄清的一个虚拟例子：

import pandas as pd
import numpy as np
import xlwings as xw

def to_excel(f): # my decorator
    @xw.func
    @xw.arg('xl_app', vba='Application')
    def wrapped(xl_app, arg1 =None, arg2 =None):
        # do some stuff
        return len(f(arg1, arg2))
    return wrapped

def foo(dim1, dim2): 
    dim1, dim2 =int(dim1), int(dim2)
    return pd.DataFrame(np.ones((dim1, dim2)))

@to_excel
def xlFoo(*args, **kwargs): # Excel UDF
    return foo(*args, **kwargs)

如果我将其导入Excel，它将自动生成以下VBA代码：

'Autogenerated code by xlwings - changes will be lost with next import! 
Function wrapped(Optional arg1, Optional arg2)  
        If TypeOf Application.Caller Is Range Then On Error GoTo failed 
        wrapped = Py.CallUDF("xl2", "wrapped", Array(Application, arg1, arg2), ThisWorkbook, Application.Caller)    
        Exit Function   
failed: 
        wrapped = Err.Description   
End Function

如果我将wrapped替换为xlFoo，它现在可以正常运行：

Function xlFoo(Optional arg1, Optional arg2)    
        If TypeOf Application.Caller Is Range Then On Error GoTo failed 
        xlFoo = Py.CallUDF("xl2", "xlFoo", Array(Application, arg1, arg2), ThisWorkbook, Application.Caller)    
        Exit Function   
failed: 
        xlFoo = Err.Description 
End Function