Discussion Unit 7 CS 1101.docx - Describe how tuples can be useful with loops over lists and dictionaries and give Python code examples Create your own

Discussion Unit 7 CS 1101.docx - Describe how tuples can be...

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Describe how tuples can be useful with loops over lists and dictionaries , and give Python code examples. Create your own code examples. Do not copy them from the textbook or any other source. Your descriptions and examples should include the following: the zip function, the enumerate function, and the items method. 51 words Permalink | Reply Re: Discussion Forum Unit 7 by Lansana Ansumana - Thursday, 17 October 2019, 5:17 AM The Solution - Lists, Tuples, and Dictionaries For these three problems, Python uses three different solutions - Tuples, lists, and dictionaries: Lists are what they seem - a list of values. Each one of them is numbered, starting from zero - the first one is numbered zero, the second 1, the third 2, etc. You can remove values from the list, and add new values to the end. Example: Your many cats' names. Tuples are just like lists, but you can't change their values. The values that you give it first up, are the values that you are stuck with for the rest of the program. Again, each value is numbered starting from zero, for easy reference. Example: the names of the months of the year. Dictionaries are similar to what their name suggests - a dictionary. In a dictionary, you have an 'index' of words, and for each of them a definition. In python, the word is called a 'key', and the definition a 'value'. The values in a dictionary aren't numbered - tare similar to what their name suggests - a dictionary. In a dictionary, you have an 'index' of words, and for each of them a definition. In python, the word is called a 'key', and the definition a 'value'. The values in a dictionary aren't numbered - they aren't in any specific order, either - the key does the same thing. You can add, remove, and modify the values in dictionaries. Example: telephone book.
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Tuples Tuples are pretty easy to make. You give your tuple a name, then after that the list of values it will carry. For example, the months of the year: Example: 'july','August', 'September' ,'October', 'November' December' Lists Lists are extremely similar to tuples. Lists are modifiable (or 'mutable', as a programmer may say), so their values can be changed. Most of the time we use lists, not tuples, because we want to easily change the values of things if we need to. Lists are defined very similarly to tuples. Say you have FIVE cats, called Tom, Snappy, Kitty, Jessie and Chester. To put them in a list, you would do this: Example: cats = ['Tom', 'Snappy', 'Kitty', 'Jessie', 'Chester'] Dictionaries Ok, so there is more to life than the names of your cats. You need to call your sister, mother, son, the fruit man, and anyone else who needs to know that their favourite cat is dead. For that you need a telephone book. Now, the lists we've used above aren't really suitable for a telephone book. You need to know a number based on someone's name - not the other way around, like what we did with the cats. In the examples of months and cats, we gave the computer a number, and it gave us a name. This time we want to give the computer a name, and it give us a number. For this we need Dictionaries .
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