Python unexpected EOF while parsing

Here's my python code. Could someone show me what's wrong with it.

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

And Here's what happens:

>>> 
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
>>> 

Solution 1:

Use raw_input instead of 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

Note: this is only for Python 2. For Python 3, raw_input() has become plain input() and the Python 2 input() has been removed.

Solution 2:

Indent it! first. That would take care of your SyntaxError.

Apart from that there are couple of other problems in your program.

• Use raw_input when you want accept string as an input. input takes only Python expressions and it does an eval on them.

• You are using certain 8bit characters in your script like 0°. You might need to define the encoding at the top of your script using # -*- coding:latin-1 -*- line commonly called as coding-cookie.

• Also, while doing str comparison, normalize the strings and compare. (people using lower() it) This helps in giving little flexibility with user input.

• I also think that reading Python tutorial might helpful to you. :)

Sample Code

#-*- coding: latin1 -*-

while 1:
    date=raw_input("Example: March 21 | What is the date? ")
    if date.lower() == "march 21":

    ....

Solution 3:

I had this error, because of a missing closing parenthesis on a line.

I started off having an issue with a line saying: invalid syntax (<string>, line ...)? at the end of my script.

I deleted that line, then got the EOF message.

Solution 4:

While @simon's answer is most helpful in Python 2, raw_input is not present in Python 3. I'd suggest doing the following to make sure your code works equally well in Python 2 and Python 3:

First, pip install future:

$ pip install future

Second: import input from future.builtins

# my_file.py    
from future.builtins import input
str_value = input('Type something in: ')

And for the specific example listed above:

# example.py
from future.builtins import input
my_date = input("Example: March 21 | What is the date? ")