#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
Variables
"""

# There are no declarations in python3, only assignments.
# Use lower_case_with_underscores for variable names.
some_var = 5
some_var  # => 5

# Accessing a previously unassigned variable names is an error / exception.
# >>> print(some_unknown_var)
# If we ran the line above, it raises a NameError, learn to read errors!!!!
# NameError: name 'some_unknown_var' is not defined

my_string = "This is a string"
my_string = 'This is a string too with an " in it'
my_string2: str = (
    "The : str part is optional, and for now is just a helpful note, called a type hint"
)
my_string3: str = "The thing below isn't a number, but a string"
my_string4: str = "4"
my_int: int = 4  # This is a real int
my_string = "We're re-using the above name (my_string) for a new object. Variables (labels) can be re-assigned to new objects"
# They can also be assigned to new objects of different type, but that's usualyl not good style.
my_string = 4

# Variables are just references to objects stored in memory
# These references are like numeric addresses
# The variable name does not have a type, but the object being referenced does.
myint: int = 7
print(type(myint))
print(id(myint))
print(myint)

myfloat: float = 7.0
print(type(myfloat))
print(id(myfloat))
print(myfloat)

myfloat = float(myint)
print(type(myfloat))
print(id(myfloat))
print(myfloat)

mystring = "hello"
print(type(mystring))
print(id(mystring))
print(mystring)