Good
exp = -1.05
value = (item_value / item_count) * offset / exp
value = my_list[index]
value = my_dict['key']
Bad
exp = - 1.05
value = ( item_value / item_count ) * offset / exp
value = (item_value/item_count)*offset/exp
value=( item_value/item_count ) * offset/exp
value = my_list[ index ]
value = my_dict ['key']
永远不要用变量与常量做比较，而是把常量与变量做比较:
God
if method == 'md5':
pass
Bad
if 'md5' == method:
pass