xlwings module.py 从 excel 调用 python

Question

我在尝试从 excel 调用 module.py 文件时不断收到此错误

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "F:\ana\module.py", line 6, in rand_numbers
    wb = Workbook.caller()  # Creates a reference to the calling Excel file
AttributeError: type object 'Workbook' has no attribute 'caller'

当我将 wb = Workbook.caller() 替换为 wb = Workbook() 时，我收到此错误

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "F:\ana\module.py", line 11, in rand_numbers
    rand_num = np.random.randn(n, n)
  File "mtrand.pyx", line 1341, in mtrand.RandomState.randn (numpy\random\mtrand\mtrand.c:11537)
  File "mtrand.pyx", line 1454, in mtrand.RandomState.standard_normal (numpy\random\mtrand\mtrand.c:11839)
  File "mtrand.pyx", line 142, in mtrand.cont0_array (numpy\random\mtrand\mtrand.c:1867)
TypeError: an integer is required

或者 [场景 2]，我可以在使用 this sample code 时从 excel 调用 python 文件

from xlwings import Workbook, Sheet, Range, Chart
wb = Workbook()  # Creates a connection with a new workbook
#wb = Workbook.caller()
Range('A1').value = 'Foo 1'
Range('A2').value = [['Foo 1', 'Foo 2', 'Foo 3'], [10.0, 20.0, 30.0]]
Range('A13').table.value  # or: Range('A1:C2').value
Sheet(1).name
chart = Chart.add(source_data=Range('A2').table)

但是 excel 中的调用仅适用于 wb = Workbook() 而不是 wb = Workbook.caller()

我知道this API documentation update

module.py

import numpy as np
from xlwings import Workbook, Range

def rand_numbers():
    """ produces std. normally distributed random numbers with shape (n,n)"""
    wb = Workbook.caller()  # Creates a reference to the calling Excel file
    n = Range('Sheet1', 'B1').value  # Write desired dimensions into Cell B1
    rand_num = np.random.randn(n, n)
    Range('Sheet1', 'C3').value = rand_num

VBA 代码

Sub MyMacro()
    RunPython ("import module; module.rand_numbers()")
End Sub

testing.py（测试示例代码 - 场景 2）

from xlwings import Workbook, Sheet, Range, Chart
wb = Workbook()  # Creates a connection with a new workbook
#wb = Workbook.caller()
Range('A1').value = 'Foo 1'
Range('A2').value = [['Foo 1', 'Foo 2', 'Foo 3'], [10.0, 20.0, 30.0]]
Range('A13').table.value  # or: Range('A1:C2').value
Sheet(1).name
chart = Chart.add(source_data=Range('A2').table)

VBA 代码

Sub MyMacro()
    RunPython ("import testing") 
End Sub

Answer 1

当电子表格中的单元格 B1 保留为空时，xlwings 版本 0.3.4 和 winpython 2.7.9.4 完全相同，因此出现错误“需要整数”。所以通过单元格 B1 传入 numpy 数组的维度将解决第一组示例代码中的问题。

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "mymodule.py", line 8, in rand_numbers
    rand_num = np.random.randn(n, n)
  File "mtrand.pyx", line 1352, in mtrand.RandomState.randn (numpy\random\mtrand\mtrand.c:13134)
  File "mtrand.pyx", line 1465, in mtrand.RandomState.standard_normal (numpy\random\mtrand\mtrand.c:13467)
  File "mtrand.pyx", line 145, in mtrand.cont0_array (numpy\random\mtrand\mtrand.c:1810)
TypeError: an integer is required