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<h1>Introduction to Python Versions</h1>
<p>Brief History of Python<br>
Python 2 release in 2000<br>
Python 3 release in 2008<br>
Key differences aim to make Python more powerful and easier to use</p>
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<h1>Syntax Differences</h1>
<p>Print function<br>
Python 2: <code>print "Hello, world!"</code><br>
Python 3: <code>print("Hello, world!")</code><br>
Integer division<br>
Python 2: <code>3/2 = 1</code><br>
Python 3: <code>3/2 = 1.5</code></p>
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<h1>Unicode Support</h1>
<p>Python 2: Strings are ASCII by default. Unicode string with <code>u"unicode"</code><br>
Python 3: All strings are Unicode. Bytes type for ASCII text: <code>b"ascii"</code></p>
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<h1>Library Changes</h1>
<p>Changes in standard library<br>
Python 2: <code>urllib</code>, <code>urllib2</code>, <code>httplib</code><br>
Python 3: Unified under <code>urllib</code> package<br>
Range function<br>
Python 2: <code>xrange()</code> for efficient looping<br>
Python 3: <code>range()</code> is now like <code>xrange()</code></p>
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<h1>Error Handling</h1>
<p>Syntax for exception handling<br>
Python 2: <code>except IOError, e:</code><br>
Python 3: <code>except IOError as e:</code></p>
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<h1>Iterators and Generators</h1>
<p>Enhancements in iteration<br>
Python 3 introduces new behavior for dict methods <code>.keys()</code>, <code>.items()</code>, and <code>.values()</code> which return views instead of lists</p>
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<h1>End of Life</h1>
<p>Python 2 end of life in 2020<br>
No more official support or updates<br>
Encouragement to migrate to Python 3 for security and latest features</p>
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<h1>Migrating from Python 2 to Python 3</h1>
<p>Tools like <code>2to3</code> can help in converting Python 2 code to Python 3<br>
Considerations for maintaining compatibility<br>
Importance of testing during migration</p>
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<h1>Conclusion</h1>
<p>Python 3 offers significant improvements and is the future of Python<br>
Transitioning to Python 3 is essential for access to new features and continued support</p>
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<h1>Resources</h1>
<p>Official Python documentation</p>
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