Open In App

Python bit functions on int (bit_length, to_bytes and from_bytes)

Last Updated : 20 Aug, 2020
Improve
Improve
Like Article
Like
Save
Share
Report

The int type implements the numbers.Integral abstract base class.

1. int.bit_length()
Returns the number of bits required to represent an integer in binary, excluding the sign and leading zeros.

Code to demonstrate




num = 7
print(num.bit_length())
  
num = -7
print(num.bit_length())


Output:

3
3

2. int.to_bytes(length, byteorder, *, signed=False)
Return an array of bytes representing an integer.If byteorder is “big”, the most significant byte is at the beginning of the byte array. If byteorder is “little”, the most significant byte is at the end of the byte array. The signed argument determines whether two’s complement is used to represent the integer.




# Returns byte representation of 1024 in a
# big endian machine.
print((1024).to_bytes(2, byteorder ='big'))


Output:

b'\x04\x00'

3. int.from_bytes(bytes, byteorder, *, signed=False)
Returns the integer represented by the given array of bytes.




# Returns integer value of '\x00\x10' in big endian machine.
print(int.from_bytes(b'\x00\x10', byteorder ='big'))


Output:

16


Like Article
Suggest improvement
Previous
Next
Share your thoughts in the comments

Similar Reads