example

import pandas as pd
import numpy as np
import os,sys

df = pd.read_excel("C:\\Users\\ryanzhang\\Desktop\\template.xlsx")
a = df.columns
b = pd.DataFrame(a,a)
c = b.T
d = c.append(df)

def highlight_max(s):
    if s.name == 0:
    #print(['background-color: yellow' if v else '' for v in is_max])
        return ['background-color: yellow']*len(s)
    else:
        return ['']*len(s)
    
one = df.style.set_properties(**{'border-style': 'solid','border-width':'1px','text-align':'left'})
two = one.apply(highlight_max,axis=1)
two.to_excel("C:\\Users\\ryanzhang\\Desktop\\test.xlsx",header=False, index=False,)