Convert binary to ASCII and vice versa

Question

Using this code to take a string and convert it to binary   bin reduce lambda x  y  256 x y   ord c  for c in  hello    0     this outputs   0b110100001100101011011000110110001101111   Which  if I put it into this site  on the right hand site  I get my message of hello back  I m wondering what method it uses  I know I could splice apart the string of binary into 8 s and then match it to the corresponding value to bin ord character   or some other way  Really looking for something simpler

User · Answer

This is my way to solve your task   str    0b110100001100101011011000110110001101111  str    0    str 2   message      while str            i   chr int str  8   2       message   message   i     str   str 8   print message

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For ASCII characters in the range   -   on Python 2    gt  gt  gt  import binascii  gt  gt  gt  bin int binascii hexlify  hello    16    0b110100001100101011011000110110001101111    In reverse    gt  gt  gt  n   int  0b110100001100101011011000110110001101111   2   gt  gt  gt  binascii unhexlify   x    n   hello      In Python 3 2     gt  gt  gt  bin int from bytes  hello  encode     big     0b110100001100101011011000110110001101111    In reverse    gt  gt  gt  n   int  0b110100001100101011011000110110001101111   2   gt  gt  gt  n to bytes  n bit length     7     8   big   decode    hello      To support all Unicode characters in Python 3   def text to bits text  encoding  utf-8   errors  surrogatepass        bits   bin int from bytes text encode encoding  errors    big    2       return bits zfill 8     len bits    7     8    def text from bits bits  encoding  utf-8   errors  surrogatepass        n   int bits  2      return n to bytes  n bit length     7     8   big   decode encoding  errors  or   0    Here s  single-source Python 2 3 compatible version   import binascii  def text to bits text  encoding  utf-8   errors  surrogatepass        bits   bin int binascii hexlify text encode encoding  errors    16   2       return bits zfill 8     len bits    7     8    def text from bits bits  encoding  utf-8   errors  surrogatepass        n   int bits  2      return int2bytes n  decode encoding  errors   def int2bytes i       hex string     x    i     n   len hex string      return binascii unhexlify hex string zfill n    n  amp  1      Example   gt  gt  gt  text to bits  hello    0110100001100101011011000110110001101111   gt  gt  gt  text from bits  110100001100101011011000110110001101111      u hello  True

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if you don y want to import any files you can use this   with open  Test1 txt    r   as File1  St        join format ord x    b   for x in File1 read     StrList   St split        to convert a text file to binary   and you can use this to convert it back to string   StrOrgList   StrOrgMsg split        for StrValue in StrOrgList      if StrValue                 StrMsg    chr int str StrValue  2   print StrMsg    hope that is helpful  i ve used this with some custom encryption to send over TCP

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I m not sure how you think you can do it other than character-by-character -- it s inherently a character-by-character operation  There is certainly code out there to do this for you  but there is no  simpler  way than doing it character-by-character   First  you need to strip the 0b prefix  and left-zero-pad the string so it s length is divisible by 8  to make dividing the bitstring up into characters easy   bitstring   bitstring 2   bitstring   -len bitstring    8    0    bitstring   Then you divide the string up into blocks of eight binary digits  convert them to ASCII characters  and join them back into a string   string blocks    bitstring i i 8  for i in range 0  len bitstring   8   string      join chr int char  2   for char in string blocks    If you actually want to treat it as a number  you still have to account for the fact that the leftmost character will be at most seven digits long if you want to go left-to-right instead of right-to-left

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This is a spruced up version of J F  Sebastian s  Thanks for the snippets though J F  Sebastian   import binascii  sys def goodbye        sys exit   n      43   n nGood Bye  Come use again  n n      43     while   name       main         print   A scii to Binary   B inary to Ascii  or  E xit       var1 raw input   gt  gt  gt         if var1   a           string raw input  String to convert  n gt  gt  gt             convert bin int binascii hexlify string   16           i 2         truebin            while i  len convert               truebin append convert i               i i 1         convert    join truebin          print   n      84   n n  convert   n n      84   n      if var1   b           binary raw input  Binary to convert  n gt  gt  gt             n   int binary  2          done binascii unhexlify   x    n          print   n      84   n n  done   n n      84   n      if var1   e           aus raw input  Are you sure   y n  n gt  gt  gt             if aus   y               goodbye

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Built-in only python  Here is a pure python method for simple strings  left here for posterity   def string2bits s          return  bin ord x   2   zfill 8  for x in s   def bits2string b None       return    join  chr int x  2   for x in b    s    Hello  World   b   string2bits s  s2   bits2string b   print  String   print s  print   nList of Bits   for x in b      print x  print   nString   print s2     String  Hello  World   List of Bits  01001000 01100101 01101100 01101100 01101111 00101100 00100000 01010111 01101111 01110010 01101100 01100100 00100001  String  Hello  World

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Convert binary to its equivalent character   k 7 dec 0 new    item  x for x in input  Enter 8bit binary number with   seprator   split       for i in item      for j in i          if j   1                dec 2  k dec             k k-1         else              k k-1     new append dec      dec 0     k 7 print new  for i in new      print chr i  end

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Are you looking for the code to do it or understanding the algorithm   Does this do what you need  Specifically a2b uu and b2a uu  There are LOTS of other options in there in case those aren t what you want    NOTE  Not a Python guy but this seemed like an obvious answer

[python] Convert binary to ASCII and vice versa

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