wrapping problem

[ibaad1406]

I have a text file which contain header as well as data section. I want to read the data section but when i wrap the data into 582 character and check the length of data i got different length.please help me to sort out this problem. I am attaching the file

from textwrap import wrap
filepath='/media/ibaad/IBAAD/ab010120.18n'
with open(filepath) as fp:
    
    data=fp.read() # read all the data into single string
    data1=data.split('END OF HEADER') # split a string into list
    
    
    data_section=data1[1]
    data_section=data_section[1:]
    data_section=wrap(data_section,582)
    print(len(data_section[0]))
    print(len(data_section[1]))