Still do not get how Python iterates over a file

[tester_V]

Here you go.
I'm using a file and a list.
File:

ZPM911
ZPM1912
ZPM1919
ZPM4555
ZPM4556
ZPM4557

Snippet:

ff=open("c:/02/TTST.txt",'r')
list_1=ff.readlines()
 
list_2 = ['ZPM911,UP,DOWN','ZPM1912,UP,UP','ZPM1919,DOWN,DOWN']
 
for el in list_1 :
    el=el.strip()
     
    for ehl in list_2 :   
        ehl=ehl.strip()
        sp0,*stuff = ehl.split(",")       
        if  el == sp0 :
            print(f" Matched ++++++ {el}")        
        else :
            print(f" Not Matched -- {el}")
ff.close()