How to convert string to binary

Question

I am in need of a way to get the binary representation of a string in python  e g    st    hello world  toBinary st    Is there a module of some neat way of doing this

User · Answer

If by binary you mean bytes type  you can just use encode method of the string object that encodes your string as a bytes object using the passed encoding type  You just need to make sure you pass a proper encoding to encode function  In  9    quot hello world quot  encode  ascii                                                                                                                                                                          Out 9   b hello world   In  10   byte obj    quot hello world quot  encode  ascii                                                                                                                                                               In  11   byte obj                                                                                                                                                                                            Out 11   b hello world   In  12   byte obj 0                                                                                                                                                                                          Out 12   104  Otherwise  if you want them in form of zeros and ones --binary representation-- as a more pythonic way you can first convert your string to byte array then use bin function within map    gt  gt  gt  st    quot hello world quot   gt  gt  gt  map bin bytearray st     0b1101000    0b1100101    0b1101100    0b1101100    0b1101111    0b100000    0b1110111    0b1101111    0b1110010    0b1101100    0b1100100      Or you can join it   gt  gt  gt      join map bin bytearray st     0b1101000 0b1100101 0b1101100 0b1101100 0b1101111 0b100000 0b1110111 0b1101111 0b1110010 0b1101100 0b1100100   Note that in python3 you need to specify an encoding for bytearray function    gt  gt  gt      join map bin bytearray st  utf8      0b1101000 0b1100101 0b1101100 0b1101100 0b1101111 0b100000 0b1110111 0b1101111 0b1110010 0b1101100 0b1100100   You can also use binascii module in python 2   gt  gt  gt  import binascii  gt  gt  gt  bin int binascii hexlify st  16    0b110100001100101011011000110110001101111001000000111011101101111011100100110110001100100   hexlify return the hexadecimal representation of the binary data then you can convert to int by specifying 16 as its base then convert it to binary with bin

User · Answer

In Python version 3 6 and above you can use f-string to format result   str    hello world  print     join f  ord i  08b   for i in str    01101000 01100101 01101100 01101100 01101111 00100000 01110111 01101111 01110010 01101100 01100100    The left side of the colon  ord i   is the actual object whose value will be formatted and inserted into the output  Using ord   gives you the base-10 code point for a single str character  The right hand side of the colon is the format specifier  08 means width 8  0 padded  and the b functions as a sign to output the resulting number in base 2  binary

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You can access the code values for the characters in your string using the ord   built-in function   If you then need to format this in binary  the string format   method will do the job   a    test  print     join format ord x    b   for x in a      Thanks to Ashwini Chaudhary for posting that code snippet    While the above code works in Python 3  this matter gets more complicated if you re assuming any encoding other than UTF-8   In Python 2  strings are byte sequences  and ASCII encoding is assumed by default   In Python 3  strings are assumed to be Unicode  and there s a separate bytes type that acts more like a Python 2 string   If you wish to assume any encoding other than UTF-8  you ll need to specify the encoding   In Python 3  then  you can do something like this   a    test  a bytes   bytes a   ascii   print     join    0 b   format x  for x in a bytes      The differences between UTF-8 and ascii encoding won t be obvious for simple alphanumeric strings  but will become important if you re processing text that includes characters not in the ascii character set

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Something like this    gt  gt  gt  st    hello world   gt  gt  gt      join format ord x    b   for x in st   1101000 1100101 1101100 1101100 1101111 100000 1110111 1101111 1110010 1101100 1100100    using  bytearray   gt  gt  gt      join format x   b   for x in bytearray st   utf-8     1101000 1100101 1101100 1101100 1101111 100000 1110111 1101111 1110010 1101100 1100100

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This is an update for the existing answers which used bytearray   and can not work that way anymore    gt  gt  gt  st    hello world   gt  gt  gt  map bin  bytearray st   Traceback  most recent call last     File   lt stdin gt    line 1  in  lt module gt  TypeError  string argument without an encoding   Because  as explained in the link above  if the source is a string   you must also give the encoding    gt  gt  gt  map bin  bytearray st  encoding  utf-8     lt map object at 0x7f14dfb1ff28 gt

User · Answer

We just need to encode it    string  encode  ascii

User · Answer

a   list input  Enter a string t      def fun a       c      join   0   8-len bin ord i   2      bin ord i   2    for i in a       return c print fun a

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def method a sample string       binary       join format ord x    b   for x in sample string   def method b sample string       binary       join map bin bytearray sample string encoding  utf-8       if   name         main          from timeit import timeit      sample string    Convert this ascii strong to binary        print          timeit f method a   sample string     setup  from   main   import method a            timeit f method b   sample string     setup  from   main   import method b            9 564299999998184 2 943955828988692   method b is substantially more efficient at converting to a byte array because it makes low level function calls instead of manually transforming every character to an integer  and then converting that integer into its binary value

[python] How to convert string to binary?

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