Print a string as hex bytes

Question

I have this string  Hello world    and I want to print it using Python as 48 65 6c 6c 6f 20 77 6f 72 6c 64 20 21 21   hex   works only for integers    How can it be done

User · Answer

Just for convenience  very simple    def hexlify byteString byteString  delim               very simple way to hexlify a bytestring using delimiters         retval          for intval in byteString          retval       0123456789ABCDEF  int intval   16            retval       0123456789ABCDEF  int intval   16            retval    delim     return  retval  -1    hexlify byteString b Hello World           Out 439    48 65 6C 6C 6F 20 57 6F 72 6C 64 21

User · Answer

for something that offers more performance than    format    you can use this    gt  gt  gt      join    02x   v if type v  is int else ord v   for v in  Hello World        48 65 6C 6C 6F 20 77 6F 72 6C 64 20 21 21   gt  gt  gt    gt  gt  gt      join    02x   v if type v  is int else ord v   for v in b Hello World        48 65 6C 6C 6F 20 77 6F 72 6C 64 20 21 21   gt  gt  gt     sorry this couldn t look nicer would be nice if one could simply do   02x  v  but that only takes int    but you ll be stuck with byte-strings b   without the logic to select ord v

User · Answer

For Python 2 x       join x encode  hex   for x in  Hello World      The code above will not work with Python 3 x  for 3 x  the code below will work       join hex ord x   2   for x in  Hello World

User · Answer

Your can transform your string to a int generator  apply hex formatting for each element and intercalate with separator    gt  gt  gt  s    Hello world      gt  gt  gt      join    02x   format ord c   for c in s   48 65 6c 6c 6f 20 77 6f 72 6c 64 20 21 21

User · Answer

join x encode  hex   for x in  Hello World

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Using map and lambda function can produce a list of hex values  which can be printed  or used for other purposes    gt  gt  gt  s    Hello 1 2 3  x01 x02 x03       gt  gt  gt  map lambda c  hex ord c    s    0x48    0x65    0x6c    0x6c    0x6f    0x20    0x31    0x20    0x32    0x20    0x33    0x20    0x1    0x2    0x3    0x20    0x3a    0x29

User · Answer

A bit more general for those who don t care about Python3 or colons   from codecs import encode  data   open   dev urandom    rb   read 20  print encode data   hex           data  print encode b hello    hex       string

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Another answer in two lines that some might find easier to read  and helps with debugging line breaks or other odd characters in a string   For Python 2 7  for character in string      print character  character encode  hex     For Python 3 7  not tested on all releases of 3   for character in string      print character  character encode  utf-8   hex

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This can be done in following ways   from   future   import print function str    Hello World     for char in str      mm   int char encode  hex    16      print hex mm   sep      end         The output of this will be in hex as follows           0x48 0x65 0x6c 0x6c 0x6f 0x20 0x57 0x6f 0x72 0x6c 0x64 0x20 0x21 0x21

User · Answer

Print a string as hex bytes    The accepted answer gives   s    Hello world         join    02x   format ord c   for c in s    returns     48 65 6c 6c 6f 20 77 6f 72 6c 64 20 21 21    The accepted answer works only so long as you use bytes  mostly ascii characters   But if you use unicode  e g    a string   u                  Prevyet mir   or  Hello World  in Russian    You need to convert to bytes somehow   If your terminal doesn t accept these characters  you can decode from UTF-8 or use the names  so you can paste and run the code along with me    a string           N CYRILLIC CAPITAL LETTER PE         N CYRILLIC SMALL LETTER ER         N CYRILLIC SMALL LETTER I         N CYRILLIC SMALL LETTER VE         N CYRILLIC SMALL LETTER IE         N CYRILLIC SMALL LETTER TE         N SPACE         N CYRILLIC SMALL LETTER EM         N CYRILLIC SMALL LETTER I         N CYRILLIC SMALL LETTER ER         N EXCLAMATION MARK         N EXCLAMATION MARK       So we see that        join    02x   format ord c   for c in a string    returns   41f 440 438 432 435 442 20 43c 438 440 21 21    a poor unexpected result - these are the code points that combine to make the graphemes we see in Unicode  from the Unicode Consortium - representing languages all over the world  This is not how we actually store this information so it can be interpreted by other sources  though   To allow another source to use this data  we would usually need to convert to UTF-8 encoding  for example  to save this string in bytes to disk or to publish to html  So we need that encoding to convert the code points to the code units of UTF-8 - in Python 3  ord is not needed because bytes are iterables of integers    gt  gt  gt      join    02x   format c  for c in a string encode  utf-8     d0 9f d1 80 d0 b8 d0 b2 d0 b5 d1 82 20 d0 bc d0 b8 d1 80 21 21    Or perhaps more elegantly  using the new f-strings  only available in Python 3     gt  gt  gt      join f  c 02x   for c in a string encode  utf-8     d0 9f d1 80 d0 b8 d0 b2 d0 b5 d1 82 20 d0 bc d0 b8 d1 80 21 21    In Python 2  pass c to ord first  i e  ord c  - more examples    gt  gt  gt      join    02x   format ord c   for c in a string encode  utf-8     d0 9f d1 80 d0 b8 d0 b2 d0 b5 d1 82 20 d0 bc d0 b8 d1 80 21 21   gt  gt  gt      join format ord c    02x   for c in a string encode  utf-8     d0 9f d1 80 d0 b8 d0 b2 d0 b5 d1 82 20 d0 bc d0 b8 d1 80 21 21

User · Answer

You can use hexdump s  import hexdump hexdump dump  Hello World   sep         append  lower   if you require lower-case   This works for both Python 2  amp  3

User · Answer

Some complements to Fedor Gogolev answer   First  if the string contains characters whose  ASCII code  is below 10  they will not be displayed as required  In that case  the correct format should be   02x     gt  gt  gt  s    Hello unicode  u0005      gt  gt  gt      join   0 x   format ord c   for c in s   48 65 6c 6c 6f 20 75 6e 69 63 6f 64 65 20 5 20 21 21                                                 gt  gt  gt      join    02x   format ord c   for c in s   48 65 6c 6c 6f 20 75 6e 69 63 6f 64 65 20 05 20 21 21                                                  Second  if your  string  is in reality a  byte string  -- and since the difference matters in Python 3 -- you might prefer the following    gt  gt  gt  s   b Hello bytes  x05      gt  gt  gt      join    02x   format c  for c in s   48 65 6c 6c 6f 20 62 79 74 65 73 20 05 20 21 21    Please note there is no need for conversion in the above code as a bytes objects is defined as  an immutable sequence of integers in the range 0  lt   x  lt  256

User · Answer

With f-string   quot  quot  join f quot  ord c  x  quot  for c in  quot Hello quot

User · Answer

Using base64 b16encode in python2  its built-in    gt  gt  gt  s    Hello world      gt  gt  gt  h   base64 b16encode s   gt  gt  gt      join  h i i 2  for i in xrange 0  len h   2    48 65 6C 6C 6F 20 77 6F 72 6C 64 20 21 21

[python] Print a string as hex bytes?

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