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list  # As with strings and numbers, simply typing the name of a Python "type" will print a CLASS instance back at you.


    

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list()  # To get an actual INSTANCE of that CLASS, you "call" the object's primary built-in method using parenthesis.


    

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[]  # Square brackets are used by Python to represent lists. This is an empty list just like list()


    

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type(list)  # If you check the TYPE of the list CLASS, you will find that the CLASS defines a DATA TYPE.


    

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type(list())  # Once you put the parenthesis in, it's no longer the CLASS but rather is an INSTANCE of that CLASS.


    

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type(str), type(int), type(float), type(list), type(tuple), type(dict)  # Lots of things are the definitions of CLASS TYPES.


    

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for a_type in str, int, float, list, tuple, dict:
    message = "%s is a %s" % (a_type, type(a_type))  # These are the 6 major "types" you work with in Python.
    print(message)


    

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repr(list)  # When you see those pointy brackets in Python, it means you're seeing the "string representation" of a thing.


    

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help(list)  # Types like lists have a lot of cool stuff built-in that's worth looking at with a help()


    

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[1, 2, 3]  # Lists are more flexible than tuples. Just use square brackets for a list.


    

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for item in [1, 2, 3]:  # You can control loops with lists
    print(item)


    

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for item in [1, 2, 3, 'a', 'b', 'c', ('nested', 'tuple')]:  # The lists can contain arbitrary data-types.
    print(item)


    

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alist = ['a', 'b', 'c']  # You can assign a variable name to a list and loop through that instead:

for item in alist:
    print(item)


    

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alist = ['a', 'b', 'c']

for item in alist:
    print('foo-%s' % item)  # Look at how you can build-up and display strings. The %s formats and inserts item into string.


    

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alist.append('d')  # You can append to lists.
alist


    

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alist.pop()  # You can pop items of teh end of the list.
alist


    

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alist.pop(0)  # You can also pop from the beginning of a list uzing index 0.
alist


    

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alist = ['a', 'b', 'c']

for i, item in enumerate(alist):
    print('iteration #%s: foo-%s' % (i, item))  # You can expose Python's internal index counter with enumerate()


    

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alist = ['a', 'b', 'c']

for i, item in enumerate(alist):
    print('iteration #%s: foo-%s' % (i + 1, item))  # The internal counter is zero-based, so we must sometimes add one.