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- python - What does if __name__ == __main__: do? - Stack Overflow
Running python a py: $ python a py __name__ equals b When a py is executed, it imports the module b This causes all the code inside b to run Python sets globals()['__name__'] in the b module to the module's name, b Running python b py: $ python b py __name__ equals __main__ if-statement was executed
- python - How do you create different variable names while in a loop . . .
Unlike some languages, you can't assign to elements in a Python list that don't yet exist (you'll get a "list assignment index out of range" error) You may want to use string append("Hello") instead
- NameError: name python is not defined - Stack Overflow
I tried to start Python's interactive interpreter by typing python in the Windows Command line, but it's throwing an error: python Traceback (most recent call last): File quot; lt;stdin gt; quot;,
- Convert string to variable name in python - Stack Overflow
This is the best way, I know of to create dynamic variables in python my_dict = {} x = "Buffalo" my_dict[x] = 4 I found a similar, but not the same question here Creating dynamically named variables from user input
- What is the purpose of the single underscore _ variable in Python?
The only exception are match statements since Python 3 10: In a case pattern within a match statement, _ is a soft keyword that denotes a wildcard source Otherwise, any special meaning of _ is purely by convention Several cases are common: A dummy name when a variable is not intended to be used, but a name is required by syntax semantics
- python - How can I get the name of an object? - Stack Overflow
Objects do not necessarily have names in Python, so you can't get the name When you create a variable, like the x, y, z above then those names just act as "pointers" or "references" to the objects The object itself does not know what name(s) you are using for it, and you can not easily (if at all) get the names of all references to that object
- What does - gt; mean in Python function definitions? - Stack Overflow
funcdef: 'def' NAME parameters ['->' test] ':' suite The optional 'arrow' block was absent in Python 2 and I couldn't find any information regarding its meaning in Python 3 It turns out this is correct Python and it's accepted by the interpreter: def f(x) -> 123: return x I thought that this might be some kind of a precondition syntax, but:
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