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      1 # Copyright (c) 2009 Google Inc. All rights reserved.
      2 # Copyright (c) 2009 Apple Inc. All rights reserved.
      3 #
      4 # Redistribution and use in source and binary forms, with or without
      5 # modification, are permitted provided that the following conditions are
      6 # met:
      7 #
      8 #     * Redistributions of source code must retain the above copyright
      9 # notice, this list of conditions and the following disclaimer.
     10 #     * Redistributions in binary form must reproduce the above
     11 # copyright notice, this list of conditions and the following disclaimer
     12 # in the documentation and/or other materials provided with the
     13 # distribution.
     14 #     * Neither the name of Google Inc. nor the names of its
     15 # contributors may be used to endorse or promote products derived from
     16 # this software without specific prior written permission.
     17 #
     18 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29 
     30 import re
     31 
     32 
     33 def plural(noun):
     34     # This is a dumb plural() implementation that is just enough for our uses.
     35     if re.search("h$", noun):
     36         return noun + "es"
     37     else:
     38         return noun + "s"
     39 
     40 
     41 def pluralize(noun, count):
     42     if count != 1:
     43         noun = plural(noun)
     44     return "%d %s" % (count, noun)
     45 
     46 
     47 def join_with_separators(list_of_strings, separator=', ', only_two_separator=" and ", last_separator=', and '):
     48     if not list_of_strings:
     49         return ""
     50     if len(list_of_strings) == 1:
     51         return list_of_strings[0]
     52     if len(list_of_strings) == 2:
     53         return only_two_separator.join(list_of_strings)
     54     return "%s%s%s" % (separator.join(list_of_strings[:-1]), last_separator, list_of_strings[-1])
     55