Règle de dénomination variable dans Python

#Valid
myvar = "John"
my_var = "John"
_my_var = "John"
myVar = "John"
MYVAR = "John"
myvar2 = "John"

#Invalid
2myvar = "John"
my-var = "John"
my var = "John"
Asif Iqbal Paracha