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Why doesn't python require a type declaration for python, otherwise what is adv. not a declaring type?

If we know the type of a variable or parameter very well, why not declare them?

I would like to know why this is bad or not necessary.
Sorry, I'm new to Python (about 1 year) and before I was in the programming languages ​​C, VB, VB.NET and C #.

With Python, I hope that bad parameter types will be detected during compilation.

And I hope to have an IDE that tells me all the attributes of a variable during development. I may be too much minded for Microsoft, but declaring a variable type seems basic to me.

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4 answers

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The reason for this is that exceptions occur if you try to do something to types that are not supported, for example, by adding an integer to the string:

>>> foo = "Hello"
>>> bar = 2
>>> foo + bar
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: cannot concatenate 'str' and 'int' objects

Most other languages ​​do not behave this way, and bad things can happen because of this.

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Source: https://habr.com/ru/post/1766272/

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