Python convert string to byte array

Question

Say that I have a 4 character string  and I want to convert this string into a byte array where each character in the string is translated into its hex equivalent  e g   str    ABCD    I m trying to get my output to be   array  B    41  42  43  44     Is there a straightforward way to accomplish this

User · Answer

Just use a bytearray   which is a list of bytes    Python2   s    ABCD  b   bytearray   b extend s    Python3   s    ABCD  b   bytearray   b extend map ord  s     By the way  don t use str as a variable name since that is builtin

User · Answer

This works for me  Python 2   s    ABCD  b   bytearray s     if you print whole b  it still displays it as if its original string print b    but print first item from the array to see byte value print b 0    Reference  http   www dotnetperls com bytes-python

User · Answer

encode function can help you here  encode returns an encoded version of the string  In  44   str    ABCD   In  45    elem encode  hex   for elem in str  Out 45     41    42    43    44     or you can use array module  In  49   import array  In  50   print array array  B    ABCD   array  B    65  66  67  68

User · Answer

Depending on your needs  this can be one step or two steps 1  use encode   to convert string to bytes  immutable 2  use bytearray   to convert bytes to bytearray  mutable  s  quot ABCD quot  encoded s encode  utf-8   array bytearray encoded   The following validation is done in Python 3 7  gt  gt  gt  s  quot ABCD quot   gt  gt  gt  encoded s encode  utf-8    gt  gt  gt  encoded b ABCD   gt  gt  gt  array bytearray encoded   gt  gt  gt  array bytearray b ABCD

User · Answer

This work in both Python 2 and 3    gt  gt  gt  bytearray b ABCD   bytearray b ABCD     Note string started with b   To get individual chars    gt  gt  gt  print  DEC HEX ASC       for b in bytearray b ABCD            print b  hex b   chr b   DEC HEX ASC 65 0x41 A 66 0x42 B 67 0x43 C 68 0x44 D   Hope this helps

User · Answer

s    ABCD  from array import array a   array  B   s    If you want hex   print map hex  a

User · Answer

for python 3 it worked for what  HYRY posted  I needed it for a returned data in a dbus array  This is the only way it worked  s    ABCD    from array import array  a   array  B   s

User · Answer

An alternative to get a byte array is to encode the string in ascii   b s encode  ascii

[python] Python: convert string to byte array

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