how do I fix an index error?

[MehHz2526]

I know what an index error is, but all my variables are numbered correctly from 0 to 5 but I still have an index error. I think that the main problem has to do something with this line:
sipDifferenceYear =int(line.split(" ; ")[1].replace("\n",""))
I was told by my teacher to incorporate line.split and for loops which I don't have a good understanding of that, so my code might be hard to understand

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def write():                 with open ("MonthlyRecord.txt","w") as f:             global sipDifferenceYear             sipDifferenceYear = 0             f.write ("SIP:" +str(Name))             f.write (" ; ")             f.write ("Expiry:"+str (sipDifferenceYear))             f.write (" ; ")             f.write ("£:" +str (totalCost1))             f.write (" ; ")             f.write ("£:" +str (totalCost2))             f.write (" ; ")             f.write ("£:" +str (totalCost3))             f.write (" ; ")             f.write ("£:" +str (finalcost))             f.write ("\n ")             exit   def read():         with open("MonthlyRecord.txt","r") as f :             lookfor= input ("RE ENTER NAME:")             for line in f.readline ():                 Name=(line.split (" ; ")[0])                 sipDifferenceYear =int(line.split(" ; ")[1].replace("\n",""))                 if Name == lookfor:                     print(sipDifferenceYear)                                                     Name= input("NAME:") sipDifferenceYear= int(input("sipDifferenceYear:")) totalCost1 = float(input("totalCost1:")) totalCost2 = float(input("totalCost2:")) totalCost3 = float(input("totalCost3:")) finalcost = float(input("finalcost: ")) write() read()

Error:
Traceback (most recent call last):
  File "main.py", line 40, in <module>
    read()
  File "main.py", line 26, in read
    sipDifferenceYear =int(line.split(" ; ")[1].replace("\n",""))
IndexError: list index out of range

Output:
NAME:meh
sipDifferenceYear:0
totalCost1:2.0
totalCost2:2.0
totalCost3:2.0
finalcost: 6.0
RE ENTER NAME:meh 
Traceback (most recent call last):
  File "main.py", line 40, in <module>
    read()
  File "main.py", line 26, in read
    sipDifferenceYear =int(line.split(" ; ")[1].replace("\n",""))
IndexError: list index out of range

[Gribouillis]

line.split(" ; ") returns a list. If this list has length smaller or equal to 1, there is no item at index [1] in the list. For some reason, one of the lines in MonthlyRecord.txt has a different format from what you expect. Try to find this line first.