蟒蛇3.该函数未从 txt 文件应用

问：

我有一个为行着色的函数，它在 .py 文件中工作正常。 我想将函数传输到 txt 文件，以便用户可以更改它，但是在读取 txt 文件时，该函数不起作用。

import pandas as pd
from datetime import datetime
import numpy as np
name = ['Diego', 'Luis']
date2 = pd.to_datetime(['20:52:10', '20:50:10']).strftime('%H:%M:%S')
mark = ['0', '1']
df = pd.DataFrame({'Name':name,'Date_plan':date2,'mark':mark})

def highlight_val(row):
    value = row.loc['mark']
    if value == '1':
        color = '#ff1100' 
    else:
        color = ''  
    return ['background-color: {}'.format(color) for r in row]

st = df.style.apply(highlight_val, axis=1)
all_htm_text = st.render()

f= open('fileNew.html', 'w')
f.write(all_htm_text)
f.close()

下面是带有外部 txt 文件的代码：

import pandas as pd
from datetime import datetime
import numpy as np
name = ['Diego', 'Luis']
date2 = pd.to_datetime(['20:52:10', '20:50:10']).strftime('%H:%M:%S')
mark = ['0', '1']
df = pd.DataFrame({'Name':name,'Date_plan':date2,'mark':mark})

functext = ""
with open("C:/python/background color/backcolorfunc_1.txt", "r" ) as fp:
    functext = str(fp.read())
print(functext)
def hightlight_multy(row): 
    ret = ["" for _ in row.index]
    if row.mark == '1': "'"+functext+"'"
        #ret[row.index.get_loc("Name")] = "background-color: blue"  #! this row is in the txt file
    return ret

st = df.style.apply(hightlight_multy, axis=1)
all_htm_text = ''
all_htm_text = st.render()
f= open('fileNew.html', 'w')
f.write(all_htm_text)
f.close()

为什么函数的主体不能从从 txt 文件中读取的变量中工作？