python read function

[FlyingPig]

Can I read from the stdin in binary? the function input() and os.stdin.read() both require "utf-8". I want to do this because my python homework testing framework use "./xxx.py < input.txt" to run my python script, but the input.txt may contain some random binary value. How can I handle this ?

[Gribouillis]

Use the underlying buffer member of the stdin stream

binary = sys.stdin.buffer.read(1024)

[bowlofred]

From the docs under sys.stdin

Note To write or read binary data from/to the standard streams, use the underlying binary buffer object. For example, to write bytes to stdout, use sys.stdout.buffer.write(b'abc')....

So something like:

import sys

binary_data = sys.stdin.buffer.read()
print(binary_data)

Output:
$ echo -e '\x15\x12' | python3 read_stdin.py
b'\x15\x12\n'