如何更改 excel 电子表格中某些列的数字格式？

Question

我想删除美元符号格式，$###,##0.00 并将其替换为 #,##0.00 数字格式。

我试过只更改 sheet 中一个单元格的格式，但我不知道它是否正在执行任何操作，因为文件中没有任何更改。

wb = openpyxl.load_workbook('example.xlsx')
sheet = wb['example']
sheet('E7').number_format = '#,##0.00'

我希望输出将 E7 的值从 $380.00 更改为 380.00，但我收到 TypeError: 'Worksheet' object is not callable 和文件没有任何变化。

Answer 1

对于单个单元格：

import re
f_clean = lambda x: re.sub('[$\-,\|]', '', x)
f_float = lambda x: float(x) if x!='' else np.NaN

print(f_float(f_clean(',000.00')))
# 10000.0

对于整列：

# Here's a solution I use for large datasets:

import re

def lookup_money(s):
    """
    This is an extremely fast approach to parsing currency to floats.
    For large data, the same currencies are often repeated. Rather than
    re-parse these, we store all unique values, parse them, and
    use a lookup to convert all figures.
    (Should be 10X faster than without lookup dict)
    """
    f_clean = lambda x: re.sub('[$\-,\|]', '', x)
    f_float = lambda x: float(x) if x!='' else np.NaN
    currencies = {curr:f_float(f_convert(curr)) for curr in s.unique()}
    return s.map(currencies)

# apply to some df as such:
# df['curr'] = df['curr'].apply(lookup_money)

如何更改 excel 电子表格中某些列的数字格式？

How to change the number formatting of certain columns in an excel spreadsheet?

python

openpyxl