Kazuhiro Fujie added the comment:
Hi, Mark
Thank you for teaching politely.
I had misunderstood about format() and round() functions.
I made mistakes though I already knew about floating point.
I think try to take this tactics on my codes.
num1 = 4.625
num2 = 4.62501
num3 = 4.62500000000001
num4 = 4.625000000000001
num5 = 4.6250000000000001
print(num1, num2, num3, num4, num5)
#=> 4.625 4.62501 4.62500000000001 4.625000000000001 4.625
print("{0:.2f} : {1:.2f} : {2:.2f} : {3:.2f} : {4:.2f}".format(num1, num2,
num3, num4, num5))
#=> 4.62 : 4.63 : 4.63 : 4.63 : 4.62
print("{0:.3f} : {1:.3f} : {2:.3f} : {3:.3f} : {4:.3f}".format(num1, num2,
num3, num4, num5))
#=> 4.625 : 4.625 : 4.625 : 4.625 : 4.625
print("{0:.4f} : {1:.4f} : {2:.4f} : {3:.4f} : {4:.4f}".format(num1, num2,
num3, num4, num5))
#=> 4.6250 : 4.6250 : 4.6250 : 4.6250 : 4.6250
print("{0:.16f} : {1:.16f} : {2:.16f} : {3:.16f} : {4:.16f}".format(num1, num2,
num3, num4, num5))
#=> 4.6250000000000000 : 4.6250099999999996 : 4.6250000000000098 :
4.6250000000000009 : 4.6250000000000000
data = 4.625
plus = 0.000000000000001
num = data + plus
print("{0:.2f}".format(num)) #=> 4.63
Thank you very much.
----------
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue30453>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
