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Fix omitting in list and clarified comments
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@ -209,9 +209,9 @@ li[4] # Raises an IndexError
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# The start index is included, the end index is not
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# (It's a closed/open range for you mathy types.)
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li[1:3] # => [2, 4]
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# Omit the end
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# Omit the beginning and return the list
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li[2:] # => [4, 3]
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# Omit the beginning
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# Omit the end and return the list
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li[:3] # => [1, 2, 4]
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# Select every second entry
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li[::2] # =>[1, 4]
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