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Source Code for Module fuzzy.storage.fcl.Reader

 1  #!/usr/bin/env python 
 2  # 
 3  # Copyright (C) 2009  Rene Liebscher 
 4  # 
 5  # This program is free software; you can redistribute it and/or modify it under 
 6  # the terms of the GNU Lesser General Public License as published by the Free  
 7  # Software Foundation; either version 3 of the License, or (at your option) any 
 8  # later version. 
 9  # 
10  # This program is distributed in the hope that it will be useful, but WITHOUT  
11  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
12  # FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more 
13  # details. 
14  #  
15  # You should have received a copy of the GNU Lesser General Public License 
16  # along with this program; if not, see <http://www.gnu.org/licenses/>.  
17  # 
18  """Load a fuzzy system from FCL file, stream or string.""" 
19   
20  __revision__ = "$Id: Reader.py,v 1.6 2013-01-09 20:10:19 rliebscher Exp $" 
21   
22  # antlr3 uses sys.maxint which is removed in python3 
23  import sys 
24  try: 
25      sys.maxint 
26  except: 
27      sys.maxint = sys.maxsize 
28   
29  import antlr3 
30   
31  try: 
32      from fuzzy.storage.fcl.FCLLexer import FCLLexer 
33  except: 
34      from fuzzy.storage.fcl.FCLLexer3 import FCLLexer 
35  from fuzzy.storage.fcl.FCLParser import FCLParser 
36   
37 -class Reader(object): 
38      """Parses a FCL file to a fuzzy.System.System instance""" 
39   
40 -    def __load(self, char_stream): 
41          """Common part of load methods.""" 
42          lexer = FCLLexer(char_stream) 
43          tokens = antlr3.CommonTokenStream(lexer) 
44          parser = FCLParser(tokens) 
45          return parser.main() 
46   
47 -    def load_from_file(self, filename): 
48          """Load a fuzzy system from FCL file.""" 
49          encoding = None 
50          f = None 
51          try: 
52              # read first line 
53              f = open(filename) 
54              line = f.readline() 
55              import re 
56              # check for coding 
57              result = re.search(r'coding[=:]\s*([-\w.]+)', line) 
58              if result: 
59                  # found one and use it 
60                  encoding = result.group(1) 
61          except: 
62              # ok, then try without encoding 
63              pass 
64          if f: 
65              f.close() 
66          return self.__load(antlr3.ANTLRFileStream(filename, encoding)) 
67   
68 -    def load_from_stream(self, stream): 
69          """Load a fuzzy system from FCL stream.""" 
70          return self.__load(antlr3.ANTLRInputStream(stream)) 
71   
72 -    def load_from_string(self, str): 
73          """Load a fuzzy system from FCL string.""" 
74          return self.__load(antlr3.ANTLRStringStream(str)) 
75   

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