如何在Python中为正数打印数字的正负号

Question

有没有更好的方法在正数上打印数字的+号？

integer1 = 10
integer2 = 5
sign = ''
total = integer1-integer2
if total > 0: sign = '+'
print 'Total:'+sign+str(total)

0应返回不带+的0。

Answer 1

从Python3.6开始：

>>> integer1 = 10
>>> integer2 = 5
>>> total = integer1-integer2
>>> print(f'Total: {total:+}')
Total: +5

或：

for i in range(-1,2):
    print (f' {i} becomes {i:+}')

输出：

 -1 becomes -1
 0 becomes +0
 1 becomes +1