Python - 使用 xlsxwriter 创建依赖下拉列表

Question

我正在尝试使用包“xlsxwriter”创建依赖下拉列表。

举个例子，假设我使用 xlsxwriter 创建了一个 Excel 文件，我希望“B”列中的所有条目都在以下列表中:['a', 'b']。然后我希望“C”列中的条目位于:

• ['a1', 'a2'] 如果“B”列中的对应值为“a”
• ['b1', 'b2'] 如果“B”列中的对应值为“b”

这是我尝试过的:

import numpy as np
import pandas as pd

vals = np.array([['a','a1'], ['b','b2'], ['a','a2']])
df = pd.DataFrame(vals)
n_rows = df.shape[0]

# Write to xlsx file 
writer = pd.ExcelWriter('test.xlsx', engine='xlsxwriter')
df.to_excel(writer, sheet_name='Sheet1')
# Assign workbook and worksheet
workbook = writer.book
worksheet = writer.sheets['Sheet1']

# Creation of unlocked format
unlocked = workbook.add_format({'locked': False})
worksheet.set_column('B:C', None, unlocked)
# Creation of the dropdown menus
worksheet.data_validation('B2:B'+str(1+n_rows), {'validate' : 'list', 'source': ['a', 'b']})
for i in range(n_rows):
    if df.loc[i, 0] == 'a':
        worksheet.data_validation('C'+str(2+i), {'validate' : 'list', 'source': ['a1', 'a2']})
    if df.loc[i, 0] == 'b':
        worksheet.data_validation('C'+str(2+i), {'validate' : 'list', 'source': ['b1', 'b2']})

worksheet.protect()
# Close the workbook
workbook.close()

问题是，每当我打开生成的“test.xlsx”文件并将单元格“B2”的值从“a”更改为“b”时，单元格“C2”的下拉菜单保持[ 'a1', 'a2']。

任何解决此问题的帮助将不胜感激。

最好， clang

Answer 1

您可以通过在 Excel 中创建选择列表，然后通过匹配第一个元素来创建列表来完成此操作。您可以在这里阅读更多相关信息:Excel: Dropdown list dependant on other dropdown list

D 列有 a 选项，B 列有 b 选项。

您的 Excel 将如下所示:您可以将其移动到其他工作表。

import numpy as np
import pandas as pd

vals = np.array([['a','a1'], ['b','b2'], ['a','a2']])
df = pd.DataFrame(vals)
n_rows = df.shape[0]

# Write to xlsx file 
writer = pd.ExcelWriter('test.xlsx', engine='xlsxwriter')
df.to_excel(writer, sheet_name='Sheet1')
# Assign workbook and worksheet
workbook = writer.book
worksheet = writer.sheets['Sheet1']

# Creation of unlocked format
unlocked = workbook.add_format({'locked': False})
worksheet.set_column('B:C', None, unlocked)
worksheet.write('D1', 'a')
worksheet.write('D2', 'a1')
worksheet.write('D3', 'a2')

worksheet.write('E1', 'b')
worksheet.write('E2', 'b1')
worksheet.write('E3', 'b2')

# Creation of the dropdown menus
worksheet.data_validation('B2:B'+str(1+n_rows), {'validate' : 'list', 'source': ['a', 'b']})
for i in range(n_rows):
    worksheet.data_validation('C'+str(2+i), {'validate' : 'list', 'source': '=INDEX($D$2:$E$3, 0, MATCH($B$'+str(2+i)+', $D$1:$E$1, 0))'})

worksheet.protect()
# Close the workbook
workbook.close()