Python 3.12<\/a> was published on October 2, 2023<\/a>. As usual, the new version comes out in October after lots of effort by volunteers worldwide.<\/p>\n The new version comes with several new features and improvements that you\u2019ll explore in this tutorial. You can also dive into the documentation<\/a> to see a complete list of all changes.<\/p>\n In this tutorial, you\u2019ll learn about new features and improvements, like:<\/strong><\/p>\n If you want to try any of the examples in this tutorial, then you\u2019ll need to use Python 3.12. The tutorials Python 3 Installation & Setup Guide<\/a> and How Can You Install a Pre-Release Version of Python?<\/a> walk you through several options for adding a new version of Python to your system.<\/p>\n In addition to learning more about the new features coming to the language, you\u2019ll also get some advice<\/a> about what to consider before upgrading to the new version. Click the link below to download code examples demonstrating the new capabilities of Python 3.12:<\/p>\n Free Bonus:<\/strong> Click here to download your sample code<\/a> for a sneak peek at Python 3.12, coming in October 2023.<\/p>\n<\/div>\n Python is usually recognized as a good beginner language, and it\u2019s lauded for its readable syntax. One area where it\u2019s become even more user-friendly lately is error messages<\/strong>.<\/p>\n In Python 3.10<\/a>, many error messages\u2014especially for syntax errors\u2014got more informative and precise<\/a>. Similarly, Python 3.11<\/a> added more information in tracebacks<\/a>, making it more convenient to pinpoint offending code.<\/p>\n The latest version of Python continues the work of improving your developer experience by providing better error messages. In particular, several common error messages now come with helpful suggestions. In the rest of this section, you\u2019ll explore the new and improved messages.<\/p>\n Several of the improvements relate to importing modules. In the next three examples, you try to work with \u03c0 by importing When you use The reminder about remembering to import modules only triggers for standard library modules. For these error messages, Python 3.12 doesn\u2019t track third-party packages that you\u2019ve installed.<\/p>\n It\u2019s possible to import specific names from a module using a Here, you tried to import To see a third new error message, check out what happens if you import There\u2019s no In addition to these three improvements related to imports, there\u2019s a final improvement concerning methods defined inside classes. Have a look at the following implementation of a Note that you wrongly refer to [ Improve Your Python With ? Python Tricks ? \u2013 Get a short & sweet Python Trick delivered to your inbox every couple of days. >> Click here to learn more and see examples<\/a> ]<\/em><\/p>\n\n In this tutorial, you’ll learn about the new features in Python 3.12. You’ll explore how the new release extends the better error messages and faster code execution found in the previous version, and you’ll try out the improvements to f-strings and type variable syntax.<\/p>\n<\/div>","protected":false},"author":2055,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"Python 3.12: Cool New Features for You to Try - ITTeacherITFreelance.hk","description":"In this tutorial, you'll learn about the new features in Python 3.12. 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perf<\/code> profiler<\/strong> on Linux<\/li>\n<\/ul>\nImproved Error Messages<\/a><\/h2>\n
pi<\/code> from math<\/code>. In each example, you\u2019ll see one of the new suggestions in Python 3.12. Here\u2019s the first one:<\/p>\n<\/span>>>> <\/span>math<\/span>.<\/span>pi<\/span>\nTraceback (most recent call last):<\/span>\n <\/span>...<\/span>\nNameError<\/span>: name 'math' is not defined. Did you forget to import 'math'?<\/span>\n<\/span><\/code><\/pre>\n<\/div>\nmath<\/code> without importing it first, you\u2019ll get a traditional NameError<\/code>. Additionally, the parser helpfully reminds you that you need to import math<\/code> before accessing it.<\/p>\nfrom<\/code>–import<\/code><\/a> statement. If you happen to switch the order of the keywords, you\u2019ll now get a friendly nudge towards the correct syntax:<\/p>\n<\/span>>>> <\/span>import<\/span> pi<\/span> from<\/span> math<\/span>\n ...<\/span>\n import pi from math<\/span>\n ^^^^^^^^^^^^^^^^^^^<\/span>\nSyntaxError: Did you mean to use 'from ... import ...' instead?<\/span>\n<\/span><\/code><\/pre>\n<\/div>\npi<\/code> from math<\/code>, but Python needs you to reorder the statement and put from<\/code> before import<\/code>.<\/p>\npy<\/code> and not pi<\/code> from math<\/code>:<\/p>\n<\/span>>>> <\/span>from<\/span> math<\/span> import<\/span> py<\/span>\nTraceback (most recent call last):<\/span>\n <\/span>...<\/span>\nImportError<\/span>: cannot import name 'py' from 'math'. Did you mean: 'pi'?<\/span>\n<\/span><\/code><\/pre>\n<\/div>\npy<\/code> name in math<\/code>, so you get an ImportError<\/code>. The parser suggests that you probably meant pi<\/code> instead of py<\/code>. Python 3.10 introduced a similar suggestion feature<\/a>, where Python looks for similar names. What\u2019s new in Python 3.12 is the ability to do this while importing.<\/p>\nCircle<\/code> class:<\/p>\n<\/span> 1<\/span># shapes.py<\/span>\n 2<\/span>\n 3<\/span>from<\/span> math<\/span> import<\/span> pi<\/span>\n 4<\/span>\n 5<\/span>class<\/span> Circle<\/span>:<\/span>\n 6<\/span> def<\/span> __init__<\/span>(<\/span>self<\/span>,<\/span> radius<\/span>):<\/span>\n 7<\/span> self<\/span>.<\/span>radius<\/span> =<\/span> radius<\/span>\n 8<\/span>\n 9<\/span> def<\/span> area<\/span>(<\/span>self<\/span>):<\/span>\n10<\/span> return<\/span> pi<\/span> *<\/span> radius<\/span>**<\/span>2<\/span>\n<\/span><\/code><\/pre>\n<\/div>\nradius<\/code> instead of self.radius<\/code> inside .area()<\/code>. This will cause an error when you call the method:<\/p>\n<\/span>>>> <\/span>from<\/span> shapes<\/span> import<\/span> Circle<\/span>\n>>> <\/span>Circle<\/span>(<\/span>5<\/span>)<\/span>.<\/span>area<\/span>()<\/span>\nTraceback (most recent call last):<\/span>\n <\/span>...<\/span>\n File \"\/home\/realpython\/shapes.py\"<\/span>, line 10<\/span>, in area<\/span>\n <\/span>return<\/span> pi<\/span> *<\/span> radius<\/span>**<\/span>2<\/span>\n <\/span>^^^^^^<\/span>\nNameError<\/span>: name 'radius' is not defined. Did you mean: 'self.radius'?<\/span>\n<\/span><\/code><\/pre>\n<\/div>\n<\/div>\nRead the full article at https:\/\/realpython.com\/python312-new-features\/ \u00bb<\/a><\/h2>\n
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