How to calculate Python Symmetrical List Difference?.Calculate List Difference with the Set.Python List Difference with Set Subtraction.Calculate List Difference with a List Comprehension.Calculate List Difference with Duplicate Items with a For Loop.For now, let’s formally discuss strings, lists, dictionaries and tuples. I will discuss this idea in greater detail a bit further on. In addition to the built-in objects in Python, you can also create your own object (or class). If you are passing a sequence as an argument to a function, using tuples reduces the potential for unexpected behavior due to aliasing.Īgain, because tuples are immutable, they do not provide methods like split().If you want to use a sequence as a dictionary key, you have to use an immutable type like a tuple or string.In other contexts, you might prefer a list. In some contexts, like a return statement, it is syntactically simpler to create a tuple than a list.In general, lists are more common than tuples (mostly because they are mutable), but there are a few reasons why tuples may be preferable: In the subsequent pages, I will compare and contrast the similarities and differences of strings, lists, dictionaries and tuples in greater detail. The method splits the string at a given delimiter (in this case the white space “ “). Here we use the method split() which is applied to a string (making this a string method). The syntax is the name of the objects followed by a dot (or period) followed by the name of the method. In general, the notation for methods is the dot notation. Because tuples are immutable, there are no methods to modify the objects. Methods for each type of object (dot notation)įor strings, lists and dictionaries, there are set of methods you can use to manipulate the objects. Calculate the number elements in the tuple.Calculate the number of items (key-value pairs) in a dictionary.Calculate the number of elements in a list.
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