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In C# I would go:
string UserName; string Password; But now, in Python:
class User: UserName Password I receive an error that UserName isn't defined. Can I not declare a variable without a variable?
931
Use the None Keyword to Declare a Variable Without Value in Python. Python is dynamic, so one does not require to declare variables, and they exist automatically in the first scope where they are assigned. Only a regular assignment statement is required. The None is a special object of type NoneType .
In Python, sometimes it makes sense to declare a variable and not assign a value. To declare a variable without a value in Python, use the value “None”.
In Python, and many other languages, there is a value that means "no value". In Python, that value is None. So you could do something like this:
class User: username = None password = None Those sure sound like instance variables though, and not class variables, so maybe do this:
class User(object): def __init__(self): self.username = None self.password = None Note how Python assigns the None value implicitly from time to time:
def f(): pass g = f() # g now has the value of None If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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