Variables

A variable is a name bound to an object; assigning again simply re-binds the name.

Beginner

current = 0.02          # binds the name to a float object
current = "20 mA"       # now bound to a str — Python is dynamically typed
a = b = 0               # chained assignment
x, y = 3, 4             # unpacking
x, y = y, x             # swap without a temporary

Variables don't have types; objects do. type(current) tells you the type of the object the name currently refers to.

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