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    <p>Actually, it is a runtime error, because Python will try to resolve the <code>flt</code> name during runtime (because it's a dynamic language), and it won't find it. When this happens, Python yields and exception saying that it couldn't find the symbol you were using <code>flt</code> and all this happens at runtime.</p> <p>Syntax errors happen when the interpreter find something not compelling with Python's syntax. For example: The Python's grammar doesn't recognize the input syntax as a valid Python program. This may happen when:</p> <ol> <li>You forgot to add <code>:</code> at the end of an <code>if, def, class</code>, etc expression </li> <li>You forgot to close some parenthesis or brackets, etc.</li> <li>A lot of places else when you don't adhere to python's grammar :)</li> </ol> <p>In your example, there is nothing wrong with the grammar. For the interpreter, <code>flt(i)</code> is a very valid call to a <code>flt</code> method which had to be check at runtime within the scopes if it really exists. So the interpreter won't complaint and the syntax of your problem is good.</p> <p>Actually, this can be seen as a disadvantage over <em>compiled languages</em> like C#, C++, etc. This kind of errors can be detected sooner at compile time, and the compiler screams loud when it find it so you can notice it.</p> <p>With dynamic languages, you won't notice this until the actual method is called. Your program is simple, so you may find it quick. But, what about the missing <code>o</code> in <code>float</code> was inside some legacy framework within a subclass of a subclass of a class, as a property, inside some other module, etc. That would be harsh :)</p> <p><strong>UPDATE:</strong> <a href="http://docs.python.org/2/reference/executionmodel.html" rel="noreferrer">The execution model</a> in Python's docs are a great read if you're into how does Python internals works. This will clarify your doubt further and will give you a lot of knowledge :)</p> <p>Hope this helps!</p>
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    1. POWhat is the difference between syntax error and runtime error?
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    1. COIt should also be noted that in Python, a syntax error is technically a runtime error since it occurs at runtime. This is not true for compiled languages, though - they differentiate between compile-time errors (such as syntax errors) and runtime errors (such as null pointer errors).
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    2. COThat's a very good observation. Thanks for the feedback :)
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    3. CO@PauloBu,could you please check this SO question http://stackoverflow.com/questions/17652075/showing-the-checked-item-alone-without-check-box
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