Question

我有这些变量：

time1 = end_time1 - start_time1
...
time2 = end_time2 - start_time2
...
time3 = end_time3 - start_time3
...
time4 = end_time4 - start_time4
...
time5 = end_time5 - start_time5

我想这样做：

for i in range(5):
    print ("Search for " + str(i) + " element(s), has taken: " + "{0:.2f}".format(round(time,2)))

但是，在format(round(time,2))中，我想使用索引＆＃39; i＆＃39;从for到命名变量时间，如time1，time2，time3 ......

有任何线索吗？

Answer 1

您可以使用locals()：

执行此操作

for i in range(5):
    print ("Search for " + str(i) + " element(s), has taken: " + "{0:.2f}".format(round(locals()['time'+str(i+1)],2)))

Answer 2

您可以将时间变量放在一个列表中（实际上，将timeX变量作为列表放在首位而不是单独的变量可能更有利）。

times = [time1, time2, time3, time4, time5]

for i in range(5):
    print ("Search for " + str(i) + " element(s), has taken: " + \
           "{0:.2f}".format(round(times[i],2)))

将for的索引分配给变量名词

2 个答案: