title: AttributeError: 'str' object has no attribute 'seek'
body: <p>I’m a noob in python 3. I’ve looked extensively for the solution of my problem but I couldn’t understand why the method .seek() doesn't work.
  I want to do a program that copy the information of one archive to the final of another archive. I know that I could do with appending or other methods but, in fact, what intrigue me it's why the attributeerror happen in this program. </p>
  
  <p>Thanks in advance.</p>
  
  <pre><code>from sys import argv
  script, from_file, to_file=argv
  print(f"Are you sure that you want to copy {from_file} to {to_file}?")
  print("Ready hit RETURN to continue, CTRL-C to abort")
  input()
  origin_file=""
  final_file=""
  
  try:
    file1=open(from_file,'r')
    file2=open(to_file,'r+')
    file1=file1.read()
  
  except:
    print('There is not a file')
  
  file2.seek(0,2)
  file2.write(file1)
  
  print(final_file)
  </code></pre>
  
  <p>Resolved: I can't use seek with string object.:):)</p>