\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5×\D6?\BDê\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2€ \00 $\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4ê\E9\F2á\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org) # Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php """ Creates a human-readable identifier, using numbers and digits, avoiding ambiguous numbers and letters. hash_identifier can be used to create compact representations that are unique for a certain string (or concatenation of strings) """ try: from hashlib import md5 except ImportError: from md5 import md5 good_characters = "23456789abcdefghjkmnpqrtuvwxyz" base = len(good_characters) def make_identifier(number): """ Encodes a number as an identifier. """ if not isinstance(number, (int, long)): raise ValueError( "You can only make identifiers out of integers (not %r)" % number) if number < 0: raise ValueError( "You cannot make identifiers out of negative numbers: %r" % number) result = [] while number: next = number % base result.append(good_characters[next]) # Note, this depends on integer rounding of results: number = number / base return ''.join(result) def hash_identifier(s, length, pad=True, hasher=md5, prefix='', group=None, upper=False): """ Hashes the string (with the given hashing module), then turns that hash into an identifier of the given length (using modulo to reduce the length of the identifier). If ``pad`` is False, then the minimum-length identifier will be used; otherwise the identifier will be padded with 0's as necessary. ``prefix`` will be added last, and does not count towards the target length. ``group`` will group the characters with ``-`` in the given lengths, and also does not count towards the target length. E.g., ``group=4`` will cause a identifier like ``a5f3-hgk3-asdf``. Grouping occurs before the prefix. """ if not callable(hasher): # Accept sha/md5 modules as well as callables hasher = hasher.new if length > 26 and hasher is md5: raise ValueError, ( "md5 cannot create hashes longer than 26 characters in " "length (you gave