Better than an array

[oldcity]

As mentioned earlier my lifetime programming language was Basic.
I ran a test of your suggestion and it gives an error message I have
no idea how to deal with.
Any suggestion most helpful.
tia
oldcity

 #!/usr/bin/python3
 dcatagory = ''
 lcnt = 0
 with open('COL-HDRS-Sel4', 'r') as catgs:
     for lcnt, line in enumerate(catgs, 1) :
         dfiles = line.strip(",")
         dcatagory = dfiles.rstrip("\n")
         mcatg[lcnt] = dcatagory





 catg = 5  # catg value to be assigned later
 print ("\n")
 print(mcatg[catg])
 print("bye ")
 

Code produces this error message.

 @oldcity ~/MyPython $ python3 fix-here
 Traceback (most recent call last):
   File "fix-here", line 8, in <module>
     mcatg[lcnt] = dcatagory
 @oldcity ~/MyPython $