Question

from datetime import datetime

time_enter = datetime.now()
print ("Has a car entered the section?")
if raw_input() == "yes":
    print (datetime.now().strftime("%H:%M:%S.%f"))
    datetime.now().strftime("%H:%M:%S.%f")
    time_leave= datetime.now()
    print ("Has a car leaved the section?")
    if raw_input() == "yes":
        print (datetime.now().strftime("%Y-%m-%d %H:%M:%S"))
        time_taken_to_travel = time_leave - time_enter
        print (time_taken_to_travel)
    else:
        print ("No car has leaved!")

else:
    print ("No car has entered!")
    print ("No car has leaved!")

您好，我已按照下面的说法编辑了我的代码，但它说第5行和原始输入存在某种错误。你能帮忙解决一下吗？

Has a car entered the section?
Traceback (most recent call last):
  File "E:\code.py", line 5, in <module>
    if raw_input() == "yes":
NameError: name 'raw_input' is not defined

Answer 1

不要太苛刻，我必须说你的代码看起来像一个大意大利面。新的行，将逻辑分离为函数等等，可以很容易地更好地概述代码。

初看起来，这部分代码至少是错误的。定义else语句时，需要有一个缩进块来执行。

 else:
 print("No car has leaved!")
 time_taken_to_travel = time_leave - time_enter
 print (time_taken_to_travel)

应该是类似的东西，或者你想要做的事情：）

 else:
     print("No car has leaved!")

 time_taken_to_travel = time_leave - time_enter
 print (time_taken_to_travel)

编辑：

好的，在顶部，修复代码以在Python 2.7中运行，如果你在Python＆gt;中运行，请注意print的不同用法。 3。

首先，在编写Python时，缩进非常重要。区分4个空格和缩进。你的代码缩进了太多的空间。您无需致电datetime.datetime.now，只需致电datetime.now。其次，为什么在减去em时将日期转换为字符串？将它们保留为日期和输入，intput不是最佳解决方案。它将验证输入的字符串。请改用raw_input。

from datetime import datetime

time_enter = datetime.now()
print "Has a car entered the section?"
if raw_input() == "yes":
    print datetime.now().strftime("%H:%M:%S.%f")
    datetime.now().strftime("%H:%M:%S.%f")
    time_leave= datetime.now()
    print "Has a car leaved the section?"
    if raw_input() == "yes":
        print datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    else:
        print "No car has leaved!"
        time_taken_to_travel = time_leave - time_enter
        print time_taken_to_travel
else:
    print "No car has entered!"
    print "No car has leaved!"

输出：

Has a car entered the section?
yes
11:41:54.281000
Has a car leaved the section?
yes
2015-10-15 11:41:55

这个python代码有什么问题？如果和其他声明

1 个答案: