如何将 Pandas 条件格式导出到 Excel 文件

Question

I have applied the following conditional formatting to a dataframe. Now, however, I want to export the dataframe to an Excel file without losing the colour formatting. Any ideas?

def highlight(ex):
    if ex.Monatsgehalt_September == 0 or ex.Bonus == 0:
        return ['color: red']*col
    else:
        return ['color: black']*col

ex.style.apply(highlight, axis=1)

Answer 1

you can't export pandas conditional formatting but you can use the module xlsxwriter

https://xlsxwriter.readthedocs.io/example_conditional_format.html#ex-cond-format

Answer 2

This section of the pandas documentation explains how dataframes can be exported to excel with conditional formatting.

Here's a simple example:

import pandas as pd
import numpy as np

# Initialize example dataframe
np.random.seed(24)
df = pd.DataFrame({'A': np.linspace(1, 10, 10)})
df = pd.concat([df, pd.DataFrame(np.random.randn(10, 4), columns=list('BCDE'))], axis=1)
df.iloc[0, 2] = np.nan

def highlight_max(s):
    """Styling function: highlights the maximum in a Series yellow."""
    is_max = s == s.max()
    return ['background-color: yellow' if v else '' for v in is_max]

def color_negative_red(val):
    """Styling function: apply red font color to negative values."""
    color = 'red' if val < 0 else 'black'
    return f'color: {color}'

# Apply conditional formatting to dataframe
styled = df.style.applymap(color_negative_red).apply(highlight_max)

# Export styled dataframe to excel
styled.to_excel('styled.xlsx', engine='xlsxwriter')