STINNER Victor <[EMAIL PROTECTED]> added the comment:
The problem is not from Python but from your FPU during the conversion
from 64 bits float to 32 float (made by struct.pack). Example in C:
#include <stdio.h>
int main()
{
float f;
double d;
d = 1.8183;
printf("d=%.20f\n", d);
f = (float)d;
d = (double)f;
printf("f=%.20f\n", f);
printf("d=%.20f\n", d);
return 0;
}
Result:
d=1.81830000000000002736 # ok
f=1.81830000877380371094 # 64->32: loose precision
d=1.81830000877380371094 # 32->64: no change
----------
resolution: -> invalid
status: open -> closed
_______________________________________
Python tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue4114>
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