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。我尝试更改工作表中一个单元格的格式，但我不知道它是否在做任何事情，因为文件中没有任何变化。wb = openpyxl.load_workbook('example.xlsx')sheet = wb['example']sheet('E7').number_format = '#,##0.00'我预计输出会将 E7 的值从$380.00更改为380.00，但我正在接收TypeError: 'Worksheet' object is not callable并且文件没有发生任何事情。

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('$10,000.00')))

# 10000.0

对于整个列：

# 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)