Bill Janssen wrote:
> Good point. Though I just grepped all my Python sources, and I never
> do that, so presumably the obvious workaround of
I'm using seek(0, 2) + tell() sometimes when I need to know the file
size and don't want to worry about buffers.
pos = fd.tell()
size = None
try:
fd.seek(0, 2)
size = fd.tell()
finally:
fd.seek(pos)
IMO you made a good point. The seek() arguments are really too UNIX
centric and hard to understand for newbies. The os module contains three
aliases for seek (SEEK_CUR, SEEK_END, SEEK_SET) (why is it called SET
and not START?) but they are rarely used.
What do you think about adding two additional functions which act as
alias from whence = 1 and whence = 2?
def seek(self, pos: int, whence: int = 0) -> int:
"""Change stream position.
Seek to byte offset pos relative to position indicated by whence:
0 Start of stream (the default). pos should be >= 0;
1 Current position - whence may be negative;
2 End of stream - whence usually negative.
Returns the new absolute position.
"""
def seekcur(self, pos: int) -> int:
"""seek relative to current position
alternative names: seekrel, seek_relative
"""
return self.seek(pos, 1)
def seekend(self, pos: int) -> int:
"""seek from end of stream
alternative names: seekeof
"""
return self.seek(pos, 2)
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