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