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1
 
input_var = input ("Press 'E' and 'Enter' to Exit: ")

NameError: name 'e' is not defined

I am using Python 2.5. How I can overcome this error?

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the line works fine, very likely your problem is not there – ShinTakezou May 9 at 8:24
@ShinTakezou: if that works fine for you, you're not using Python 2.5. – Wooble May 9 at 14:32
@Wooble using python 2.5 r25:51908 (but it would be the same with 2.7) and guess: it works just fine. In fact the problem is not the line itself (but the provided input and the wrong usage of the input)... there's a rude answer for that, it's rtfm, I've just avoided that, but can I politely pour the doubt so that people may think they need to inspect the problem more deeply to get what's going on while waiting for an actual help? I did so, or so I think. Very likely, failed. Enlightening it's such a hard matter. – ShinTakezou May 10 at 6:59
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The whole issue is input() in Python 2. If you type e at the prompt, you will get an error, so it doesn't "work fine". – Wooble May 10 at 11:20
If everyone would just read the manual, and could work out which sections of which manual to read, 90% of SO would evaporate. ;) – poolie Jul 2 at 4:12

2 Answers

up vote 6 down vote accepted

input reads and evaluates a Python expression. When it tries to evaluate it, it looks for a variable e, which is not defined, and fails.

You almost always want to use raw_input instead. (And in Python3, input has this behaviour.)

Or, better, on Unix, use readline so the user can edit their input.

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thanks for your time and link – Deepak Dubey May 9 at 9:10
up vote 0 down vote

you can simply use

input = raw_input
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I think rebinding built-in functions is just likely to confuse people. Maybe in this case where you're rebinding it to get the py3k behavior it's ok. – poolie Jul 2 at 4:11

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