import decimal
from decimal import *


X1 = Decimal('167.75')
X2 = Decimal('167.85')
X3 = Decimal('167.95')

XR1 = round(X1,1)
XR2 = round(X2,1)
XR3 = round(X3,1)

print XR1 #expected 167.8; result 167.8
print XR2 #expected 167.9; result 167.8
print XR3 #expected 168.0; result 167.9

XQ1 = X1.quantize(Decimal(".1"), ROUND_HALF_EVEN)
XQ2 = X2.quantize(Decimal(".1"), ROUND_HALF_EVEN)
XQ3 = X3.quantize(Decimal(".1"), ROUND_HALF_EVEN)


print XQ1 #expected 167.8; result 167.8
print XQ2 #expected 167.8; result 167.8
print XQ3 #expected 168.0; result 168.0