Make a list into a string python5/8/2023 That said, the Python Map Function is just the beginning. In the process, you may even impress your coding peers with this new skill. Using the Python Map Function will help take your coding skills to the next level and become a better programmer. In the end, the Python Map Function is more elegant than a for loop and will help you compile your code faster. If You Want to Transform, Python Map Function > For Loops You saved memory and your code ran faster. Instead of iterating through each member of the list of strings, the Python Map Function transformed the entire list of strings to a list of numbers. Print() prints out our new list! What's Happening Under the Hood with the Python Map Function List() takes our newly transformed iterable members and tells our computer these members are apart of a list. Again, we'll work from the inside out: print(list(result)) Result is the variable where we're storing our newly transformed members. In this instance, we inserted our list ( list_of_strings). Insert iterable here is the space where you would write in the iterable of your choice. We could have used another built-in function like len() or we could have built our own function and used it here as well. In the above code example, we used the int function. Insert function here is the space where you would write in a function. Map() is simply the name of the Python Map Function, nothing fancy here. The Python Map Function's syntax is as follows: map(insert function here, insert iterable here) Let's break down the above code from the inside out. If you run the above example, you'd get the same result:īefore we get to why the Python Map Function is more optimal than using a for loop, let's break down what we just did: list_of_strings = Īll we did here is create a variable that stores the list of strings that we want to convert to numbers. Then we'll use the Python Map Function to transform the list of strings to a list of integers: result = map(int,list_of_strings) We'll start with our list of strings that need to be converted: list_of_strings = Instead, let's use the Python Map Function to produce a functional AND optimal result. While using a for loop to transform a list is functional, it isn't optimal. You told the computer to go through each member ("5", "6", "7", etc.), convert the member, and then store that member in a new list. You may be happy with the result, but think about what your code just did. Output: What's Happening Under the Hood with the For Loop You could use an empty list and a for loop to accomplish this: list_of_strings = Let's say you have a list of strings that are actually numbers, but you need to convert the list of strings to integers: Let's walk through an example so you can understand what I mean. But using the Python Map Function saves you memory (which means that your code runs faster) and requires less code. You might be wondering, "why can't I just do the above with a for loop?"
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