When looking up help on a callable, you'll occasionally see multiple signatures listed. For example, the help output for the dict class lists 4 different function signatures.
The first signature notes that we can call dict with no arguments. The second indicates that we can pass another mapping to dict to make a copy of it.
A function signature notes the arguments that a class, function, or method accepts when called. Here's the help output for the built-in len function.
Python's built-in help function is a quick way to do just that! But sometimes the output of help can seem a bit cryptic.
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