1 # (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org) 2 # Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php 3 4 class FileMixin(object): 5 6 """ 7 Used to provide auxiliary methods to objects simulating files. 8 Objects must implement write, and read if they are input files. 9 Also they should implement close. 10 11 Other methods you may wish to override: 12 * flush() 13 * seek(offset[, whence]) 14 * tell() 15 * truncate([size]) 16 17 Attributes you may wish to provide: 18 * closed 19 * encoding (you should also respect that in write()) 20 * mode 21 * newlines (hard to support) 22 * softspace 23 """ 24 25 def flush(self): 26 pass 27 28 def next(self): 29 return self.readline() 30 31 def readline(self, size=None): 32 # @@: This is a lame implementation; but a buffer would probably 33 # be necessary for a better implementation 34 output = [] 35 while 1: 36 next = self.read(1) 37 if not next: 38 return ''.join(output) 39 output.append(next) 40 if size and size > 0 and len(output) >= size: 41 return ''.join(output) 42 if next == '\n': 43 # @@: also \r? 44 return ''.join(output) 45 46 def xreadlines(self): 47 return self 48 49 def writelines(self, lines): 50 for line in lines: 51 self.write(line) 52 53 54
