Converting the received data into binary form in python

Question

I want to convert the received hex data into binary form. I get ValueError. For example, I want the first value in the output to be printed as 0000.

 received_data = " ".join("{:02x}".format(byte) for byte in (data))
 print(received_data)
 P_data = "{0:b}".format(received_data[0:1])

Output:

 01 04 04

Error:

 Traceback (most recent call last):
 File "C:\Users\User\eclipse-workspace\Try\test1\test2.py", line 22, in 
 <module>
 P_data="{0:b}".format(received_data[0:1])
 ValueError: Unknown format code 'b' for object of type 'str'

• NPE: Why the intermediate hex representation? Going from from a stream of bytes to a stream of binary strings would be more straightforward.
• Torxed: You're probably looking for '{0:b}'.format(byte).zfill(8) ? You said binary form not hex?
• kn_pro: @NPE , hex is used for another purpose

Answer 1

You should first convert your string into an integer

P_data = '{0:b}'.format(int(received_data[0:1], 16)).zfill(4)

• kn_pro: If I receive hex in alphabets, it shows some error ValueError: invalid literal for int() with base 10: 'e'
• mistiru: Effectively, you should use base 16 instead (as it is hexadecimal), I edited my answer.