Python 解析时出现意外的 EOF

Question

这个问题已经有答案了:

Command-line input causes SyntaxError (4 个回答)

已关闭 4 天前。

这是我的Python代码。有人可以告诉我它出了什么问题吗？

while 1:
    date=input("Example: March 21 | What is the date? ")
    if date=="June 21":
        sd="23.5° North Latitude"
    if date=="March 21" | date=="September 21":
        sd="0° Latitude"
    if date=="December 21":
        sd="23.5° South Latitude"
    if sd:
        print sd

下面是发生的事情:

>>> 
Example: March 21 | What is the date? 
Traceback (most recent call last):
  File "C:\Users\Daniel\Desktop\Solar Declination Calculater.py", line 2, in <module>
    date=input("Example: March 21 | What is the date? ")
  File "<string>", line 0
    
   ^
SyntaxError: unexpected EOF while parsing
>>> 

Answer 1

使用raw_input而不是input:)

If you use input, then the data you type is is interpreted as a Python Expression which means that you end up with gawd knows what type of object in your target variable, and a heck of a wide range of exceptions that can be generated. So you should NOT use input unless you're putting something in for temporary testing, to be used only by someone who knows a bit about Python expressions.

raw_input always returns a string because, heck, that's what you always type in ... but then you can easily convert it to the specific type you want, and catch the specific exceptions that may occur. Hopefully with that explanation, it's a no-brainer to know which you should use.

Reference

注意:这仅适用于 Python 2。对于 Python 3，raw_input() 已变为普通 input()，而 Python 2 input() 已被删除。