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<p style="margin: 0 0 1em 0; color: black;">Type hints like in PEP 484 work on all Python 3 versions, and something similar to your proposal is already supported on Python 2 [1].</p>
<p style="margin: 0 0 1em 0; color: black;">[1]: <a href="https://mypy.readthedocs.io/en/latest/python2.html">https://mypy.readthedocs.io/en/latest/python2.html</a></p>
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<p style="color: black; font-size: 10pt; font-family: Arial, sans-serif; margin: 8pt 0;">On July 4, 2018 11:08:27 PM Shawn Chen <shawnchen1996@outlook.com> wrote:</p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black;background:white">Hello,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">Here, I am proposing a change on python type annotation.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">Python was born to be a simple and elegant language. However recent change has again introduce new incompatibility to python.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">The PEP 484 is proposing a type hint which can annotate the type of each parameters. How ever code written in this format can not be run for python3.5 and below.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">It is an exciting new feature to be able to know the data type from the code, But I am afraid this is not worth such a incompatibility.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">Here I want to propose a new way of annotation in python as follows<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">def reportAge(name, age):<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">''' this a a greeting function and some other comment...<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">!str, int -> str<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">'''<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"> return name+' is ' + age<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">we can put the annotation in the comment block and use a symbol '!' or other symbol suitable to lead a annotation line.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">the annotation should be positionally corresponding to the parameters.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Verdana",sans-serif;color:black">Shawn<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">
Mail</a> for Windows 10</p>
<p class="MsoNormal"><o:p> </o:p></p>
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