xlwings module.py call python from excel

问题

I keep receiving this error while trying to call the module.py file from excel

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'

When I replace wb = Workbook.caller() with wb = Workbook() I receive this error

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

Alternatively [scenario 2], I am able to call a python file from excel while using this sample code

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)

However the call in excel only works with wb = Workbook() and not wb = Workbook.caller()

I am aware of 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 code

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

testing.py (test example code - scenario 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 code

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

回答1:

I get the same error exactly with xlwings version 0.3.4 and winpython 2.7.9.4 when cell B1 in spreadsheet is left as a null, hence the error "an integer is required". So passing in the dimension of the numpy array through cell B1 will fix the problem in the first set of example code.

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

来源：https://stackoverflow.com/questions/28921933/xlwings-module-py-call-python-from-excel

标签

python

excel

excel-vba

xlwings

vba