Convert bytes into BufferedReader in python [duplicate]

Question

I have a bytearray and want to convert into a buffered reader. A way of doing it is to write the bytes into a file and read them again.

sample_bytes = bytes('this is a sample bytearray','utf-8')
with open(path,'wb') as f:
    f.write(sample_bytes)
with open(path,'rb') as f:
    extracted_bytes = f.read()
print(type(f))

output:

<class '_io.BufferedReader'>

But I want these file-like features without having to save bytes into a file. In other words I want to wrap these bytes into a buffered reader so I can apply read() method on it without having to save to local disk. I tried the code below

from io import BufferedReader
sample_bytes=bytes('this is a sample bytearray','utf-8')
file_like = BufferedReader(sample_bytes)
print(file_like.read())

but I'm getting an attribute error

AttributeError: 'bytes' object has no attribute 'readable'

How to I write and read bytes into a file like object, without saving it into local disc ?

import io; file_like = io.BytesIO(sample_bytes)

juanpa.arrivillaga
– juanpa.arrivillaga

2017-11-09 10:13:23 +00:00
Commented Nov 9, 2017 at 10:13 — juanpa.arrivillaga
– juanpa.arrivillaga, Commented Nov 9, 2017 at 10:13

EdJoJob · Accepted Answer · 2017-11-09 10:14:01Z

39

If all you are looking for is an in-memory file-like object, I would be looking at

from io import BytesIO
file_like = BytesIO(b'this is a sample bytearray')
print(file_like.read())

answered Nov 9, 2017 at 10:14

EdJoJob

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2 Comments

Csaba Toth Over a year ago

I'm trying to pass this to a requests.post's files parameter, and it doesn't work. When I open the binary file and pass that it works.

SHIVAM SINGH Over a year ago

@CsabaToth For someone in need, If you have the object of BytesIO, then pass it like io.BufferedReader(file_obj)

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