user3124171 user3124171 - 1 year ago 163
Python Question

Read specific bytes of file in python

I want to specify an offset and then read the bytes of a file like

offset = 5

and then read the next 6-10 etc. I read about seek but I cannot understand how it works and the examples arent descriptive enough.

returns what?


Answer Source

Just play with Python's REPL to see for yourself:

[...]:/tmp$ cat hello.txt 
hello world
[...]:/tmp$ python
Python 2.7.6 (default, Mar 22 2014, 22:59:56) 
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> f = open('hello.txt', 'rb')
>>>, 1)    # move the file pointer forward 6 bytes (i.e. to the 'w')
>>>        # read the rest of the file from the current file pointer
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