import re # Capitalizes the first letter of a string. capfirst = lambda x: x and x[0].upper() + x[1:] def wrap(text, width): """ A word-wrap function that preserves existing line breaks and most spaces in the text. Expects that existing line breaks are posix newlines (\n). See http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/148061 """ return reduce(lambda line, word, width=width: '%s%s%s' % (line, ' \n'[(len(line[line.rfind('\n')+1:]) + len(word.split('\n',1)[0] ) >= width)], word), text.split(' ') ) def truncate_words(s, num): "Truncates a string after a certain number of words." length = int(num) words = s.split() if len(words) > length: words = words[:length] if not words[-1].endswith('...'): words.append('...') return ' '.join(words) def get_valid_filename(s): """ Returns the given string converted to a string that can be used for a clean filename. Specifically, leading and trailing spaces are removed; other spaces are converted to underscores; and all non-filename-safe characters are removed. >>> get_valid_filename("john's portrait in 2004.jpg") 'johns_portrait_in_2004.jpg' """ s = s.strip().replace(' ', '_') return re.sub(r'[^-A-Za-z0-9_.]', '', s) def get_text_list(list_, last_word='or'): """ >>> get_text_list(['a', 'b', 'c', 'd']) 'a, b, c or d' >>> get_text_list(['a', 'b', 'c'], 'and') 'a, b and c' >>> get_text_list(['a', 'b'], 'and') 'a and b' >>> get_text_list(['a']) 'a' >>> get_text_list([]) '' """ if len(list_) == 0: return '' if len(list_) == 1: return list_[0] return '%s %s %s' % (', '.join([i for i in list_][:-1]), last_word, list_[-1]) def normalize_newlines(text): return re.sub(r'\r\n|\r|\n', '\n', text) def recapitalize(text): "Recapitalizes text, placing caps after end-of-sentence punctuation." # capwords = () text = text.lower() capsRE = re.compile(r'(?:^|(?<=[\.\?\!] ))([a-z])') text = capsRE.sub(lambda x: x.group(1).upper(), text) # for capword in capwords: # capwordRE = re.compile(r'\b%s\b' % capword, re.I) # text = capwordRE.sub(capword, text) return text def phone2numeric(phone): "Converts a phone number with letters into its numeric equivalent." letters = re.compile(r'[A-PR-Y]', re.I) char2number = lambda m: {'a': '2', 'c': '2', 'b': '2', 'e': '3', 'd': '3', 'g': '4', 'f': '3', 'i': '4', 'h': '4', 'k': '5', 'j': '5', 'm': '6', 'l': '5', 'o': '6', 'n': '6', 'p': '7', 's': '7', 'r': '7', 'u': '8', 't': '8', 'w': '9', 'v': '8', 'y': '9', 'x': '9'}.get(m.group(0).lower()) return letters.sub(char2number, phone) # From http://www.xhaus.com/alan/python/httpcomp.html#gzip # Used with permission. def compress_string(s): import cStringIO, gzip zbuf = cStringIO.StringIO() zfile = gzip.GzipFile(mode='wb', compresslevel=6, fileobj=zbuf) zfile.write(s) zfile.close() return zbuf.getvalue()