parsing - How to read specific part of large file in Python -

Given a large file (hundreds of MBs) I read content between a specific start and end index quickly How will Python use within the file?

Basically, I'm looking for a more efficient way to do:

  open (filename) .read () [start_index: end_index]    
 
 
 You can  find the file in the file  and then read the file From there some amount of search allows you to get a specific offset within a file, and then you can read only the number of bytes in that range.  
  With Open (filename): fin: fin   
 It only reads the data that you are looking for.    (start_index) data = fin.red (end_index -