Output File

[Samantha]

Is there a limit on the size of the file Python will read then output. I am 
reading a file of 433 lines and when I output the same file it only will 
output 421 lines. The last line is cut off also. This is the code I am using 
as a test.

input = open(r'C:\Documents and Settings\Owner\Desktop\somefile.html','r')
L = input.readlines()
input.close

output = open(r'C:\Documents and 
Settings\Owner\Desktop\somefile_test.html','w')
for t in range(len(L)):
 output.writelines(L[t])
output.close

Also is there a way to test for EOF in Python?
Thanks
S