Export styled dataframe to Excel (background color)

Question

I'm looking to generate an excel file from styled dataframes. Specifically I want to keep the background colors of cells.

I can generate an excel file with df.to_excel() or df.style.to_excel(), but the background color disappears along the way. Is there any way to keep the background color?

EDIT: The specific code I used:

df = pd.DataFrame([
  { 'color_A_in_red': True , 'A': 1 },
  { 'color_A_in_red': False , 'A': 2 },
  { 'color_A_in_red': True , 'A': 2 },
])

def highlight(x):
    c = f"background-color:red" 
    #condition
    m = x["color_A_in_red"]
    # DataFrame of styles
    df1 = pd.DataFrame('', index=x.index, columns=x.columns)
    # set columns by condition
    df1.loc[m, 'A'] = c
    return df1

df.style.apply(highlight, axis=None)
df.to_excel("test.xlsx")

Answer 1

df.style.apply() does not change df directly but returns a modified copy. The following code works:

df = pd.DataFrame([
  { 'color_A_in_red': True , 'A': 1 },
  { 'color_A_in_red': False , 'A': 2 },
  { 'color_A_in_red': True , 'A': 2 },
])

def highlight(x):
    c = f"background-color:red" 
    #condition
    m = x["color_A_in_red"]
    # DataFrame of styles
    df1 = pd.DataFrame('', index=x.index, columns=x.columns)
    # set columns by condition
    df1.loc[m, 'A'] = c
    return df1


df = df.style.apply(highlight, axis=None)

df.to_excel("test.xlsx")