WinXP, 3.0b2
>>>f=open('somefile', 'r')
>>>f.readline(somefloat)
Traceback (most recent call last):
File "<pyshell#70>", line 1, in <module>
f.readline(1.0)
File "C:\Program Files\Python30\lib\io.py", line 1766, in readline
return line[:endpos]
TypeError: slice indices must be integers or None or have an __index__
method
At this point, any f.read or f.readline calls fail with a similar
TypeError. The error recovery seems incomplete. The same does *not*
happen with f.read(float). Recovery is complete and subsequent
f.read/f.readline calls work.
In 2.5, float size arg worked with a deprecation warning, so issue does
not arise. I presume same is true in 2.6.