hexdump.py

Created 2 October 2002, last updated 24 April 2008

A simple script to show the contents of a file in hex.

$ hexdump 256.dat
000000: 00 01 02 03 04 05 06 07  08 09 0a 0b 0c 0d 0e 0f  ................
000010: 10 11 12 13 14 15 16 17  18 19 1a 1b 1c 1d 1e 1f  ................
000020: 20 21 22 23 24 25 26 27  28 29 2a 2b 2c 2d 2e 2f   !"#$%&'()*+,-./
000030: 30 31 32 33 34 35 36 37  38 39 3a 3b 3c 3d 3e 3f  0123456789:;<=>?
000040: 40 41 42 43 44 45 46 47  48 49 4a 4b 4c 4d 4e 4f  @ABCDEFGHIJKLMNO
000050: 50 51 52 53 54 55 56 57  58 59 5a 5b 5c 5d 5e 5f  PQRSTUVWXYZ[\]^_
000060: 60 61 62 63 64 65 66 67  68 69 6a 6b 6c 6d 6e 6f  `abcdefghijklmno
000070: 70 71 72 73 74 75 76 77  78 79 7a 7b 7c 7d 7e 7f  pqrstuvwxyz{|}~.
000080: 80 81 82 83 84 85 86 87  88 89 8a 8b 8c 8d 8e 8f  ................
000090: 90 91 92 93 94 95 96 97  98 99 9a 9b 9c 9d 9e 9f  ................
0000a0: a0 a1 a2 a3 a4 a5 a6 a7  a8 a9 aa ab ac ad ae af  ................
0000b0: b0 b1 b2 b3 b4 b5 b6 b7  b8 b9 ba bb bc bd be bf  ................
0000c0: c0 c1 c2 c3 c4 c5 c6 c7  c8 c9 ca cb cc cd ce cf  ................
0000d0: d0 d1 d2 d3 d4 d5 d6 d7  d8 d9 da db dc dd de df  ................
0000e0: e0 e1 e2 e3 e4 e5 e6 e7  e8 e9 ea eb ec ed ee ef  ................
0000f0: f0 f1 f2 f3 f4 f5 f6 f7  f8 f9 fa fb fc fd fe ff  ................

Download: hexdump.py

Thanks to Tim Hatch and David Earlam for improvements!

Need some binary data to view? Try ramp.py.

Comments

[gravatar]
Paul 1:32 PM on 22 Nov 2008
To run under both Python 3.0 and 2.5, I made the following changes. The root issue is that when a file is opened in binary mode under Python 3.0, reading it produces bytes and not a character string.
     71             if type(c) != type(int()):
     72                 c = ord(c)
     73             hex = hex + ("%02x" % (c)) + " "
     74             asc = asc + ascmap[c]

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