53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
class FileProxyMixin:
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"""
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A mixin class used to forward file methods to an underlaying file
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object. The internal file object has to be called "file"::
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class FileProxy(FileProxyMixin):
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def __init__(self, file):
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self.file = file
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"""
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encoding = property(lambda self: self.file.encoding)
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fileno = property(lambda self: self.file.fileno)
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flush = property(lambda self: self.file.flush)
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isatty = property(lambda self: self.file.isatty)
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newlines = property(lambda self: self.file.newlines)
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read = property(lambda self: self.file.read)
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readinto = property(lambda self: self.file.readinto)
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readline = property(lambda self: self.file.readline)
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readlines = property(lambda self: self.file.readlines)
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seek = property(lambda self: self.file.seek)
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tell = property(lambda self: self.file.tell)
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truncate = property(lambda self: self.file.truncate)
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write = property(lambda self: self.file.write)
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writelines = property(lambda self: self.file.writelines)
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@property
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def closed(self):
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return not self.file or self.file.closed
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def readable(self):
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if self.closed:
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return False
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if hasattr(self.file, 'readable'):
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return self.file.readable()
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return True
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def writable(self):
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if self.closed:
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return False
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if hasattr(self.file, 'writable'):
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return self.file.writable()
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return 'w' in getattr(self.file, 'mode', '')
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def seekable(self):
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if self.closed:
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return False
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if hasattr(self.file, 'seekable'):
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return self.file.seekable()
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return True
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def __iter__(self):
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return iter(self.file)
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