Python offers several ways to create a list of a fixed size, each with different performance characteristics. Sum of Python list; Python Program to Sum the list with start 10; Program to Sum the list of float; Python Program to Sum the list of float with start 10.1; Program to calculate the sum of elements in a tuple. Python: Tips of the Day. Sample Solution:- Python Code: import os file_size = os.path.getsize("abc.txt") print("\nThe size of abc.txt is :",file_size,"Bytes") print() Sample Output: The size of abc.txt is : … 0 votes. Syntax os.path.getsize() Arguments: path (string): file path Returns: int : size of the file in bytes To get the length of the list in python you can use len() function. It can be used to get the size of the given file. Size of list: ‘Start’ is optional and it’s default value is 0. Posted April 19, 2020 April 19, 2020 by Rohit. We have trained over 90,000 students from over 16,000 organizations on technologies such as Microsoft ASP.NET, Microsoft Office, Azure, Windows, Java, Adobe, Python, SQL, JavaScript, Angular and much more. (0, 'Python') (1, 'Programmming') (2, 'Is') (3, 'Fun') (10, 'Python') (11, 'Programmming') (12, 'Is') (13, 'Fun') This is the end of the tutorial about “Python enumerate() built-in-function”, this is a very short tutorial because this concept is very small and it is not much you can do with it. When using the iterators, we need to keep track of the number of items in the iterator. It can be used to get the size of the given file. The simplest one is to use the index operator ([ ]) to access an element from the list. The enumerate() function is a built-in function available in python.This function has two parameters ‘iterable’ and ’start’.‘iterable’ can be a list, tuple , string etc. In this example, we can achieve this by using for loop with a list. In order to assign any value to a list using assignment operator at position i, a[i] = x , the size of the list should be at least i+1 . See the examples below. code. However, there are times when you actually need the index of the item as well. When you need to add counters to an iterable, enumerate is usually the most elegant approach. When you use this len function on String List, it returns the total number of words in a string. Bagaimana caranya menyimpan banyak data dalam satu veriabel? The First one is quite easy and simple using the in-built len() function. Difficulty Level : Basic; Last Updated : 12 Nov, 2018; In Python, List is a collection data-type which is ordered and changeable. enumerate() Parameters. The enumerate() function takes a collection (e.g. In other programming languages (C), you often use a for loop to get the index, where you use the length of the array and then get the index using that. Python Enumerate Dictionary. Is there a way to limit size of a list in Python, so it does not use all memory? After that I want to assign values in that list, for example this is supposed to display 0 to 9: s1 = list(); Enumerate¶. In the below example we take a list named as "days". len(s) Arguments: s: A sequence like object like, list, string, bytes, tuple etc. How does len() work? Find size of a list in Python. This is just a basic introduction to list operations covering most of the methods. Varun March 3, 2018 Python : How to Iterate over a list ? Len() Function is an inbuilt function in python and returns a number of elements present in the list object. This was an easy way to calculate a moving average. The enumerate() method adds counter to the iterable. Which means we have to get the count of number of elements present in the list irrespective of whether they are duplicate or not. This Python example shows the total number of string items or the total number of words in the string List. Python: Initialize List of Size N Using range() We can initialize a list of size n using a range() statement. Recommended Articles. You can iterate over the index and value of an item in a list by using a basic for loop. Enumerate Explained (With Examples) The enumerate() function is a built-in function that returns an enumerate object. You can then overwrite some elements with index assignments. It provides a handy way to measure run times of small chunks of Python … There are ways to add elements from an iterable to the list. To create a list of n placeholder elements, multiply the list of a single placeholder element with n. For example, use [None] * 5 to create a list [None, None, None, None, None] with five elements None. remove() The remove() method is used to remove an element from the list. Python add elements to List Examples. Python: Tips of the Day. By default, range() creates a list … Strengthen your foundations with the Python Programming Foundation Course and learn the basics. It adds a loop on the iterable objects while keeping track of the current item and returns the object in an enumerable form. You’ll find many ways of accessing or indexing the elements of a Python list. To calculate the Python List Length we have generally four ways. It is recommended to play around more, get creative and explore the potential of lists further. Syntax Ok, having cleared that, getting the the size of a list or tuple (or array, if you will), is pretty straighforward. In the case of multiple … Also, some interesting applications such as using enumerate python in a list, in a tuple, in a list of tuples, in a string, starting enumerating from a specific index, and enumerating inside a list comprehension are included in this module. We’ve listed a few here. L = ['apples', 'bananas', 'oranges'] for idx, val in enumerate(L): print("index is %d and value is %s" % (idx, val)) The code above will have this output: Secondly, you can find the list length using the user-defined or you can say the naive method. A simple solution is to write a generator that yields the successive chunks of specified size from the list. The argument may be a sequence (such as a string, bytes, tuple, list, or range) or a collection (such as a dictionary, set, or frozen set). 0 votes. It will return the iterable (say list, tuple, range, string or dictionary etc.) Python List Slicing. I wrote the helper below to recursively measure the size of a Python object (or dict, tuple, list etc). Convert an integer number to a binary string prefixed with “0b”. Definition and Usage. You just call the len() function on the object, and there you have it's size. String List length Example. Examples of list and tuple size / lengths are given below. And then we add few more elements and check the length again using append() function. The returned object is a enumerate object. We can add an element to the end of the list or at any given index. Also, we will discuss: Create a list in python with sizeCreate list of size nHow to create a list from a string in PythonPython convert a list to space-separated stringCreates a list of lists in Python,Python creates a list from Even we want to eliminate some elements in a list and do not count them. This allows you to join two lists together. Slicing. Python: Enumerate. The list() constructor takes a single argument: iterable (optional) - an object that could be a sequence (string, tuples) or collection (set, dictionary) or any iterator object; Note: Python does not have built-in support for Arrays, but Python Lists can be used instead. It provides a handy way to measure run times of small chunks of Python … Inserts an item at a given position. As repr(), return a string containing a printable representation of an object, but escape the non-ASCII characters in the string returned by repr() using \x, \u or \U escapes. So I decided to fill in the gap. Return the length (the number of items) of an object. In this Python tutorial, we will discuss what is a python list and different ways to create a list in Python. Check if element exists in list using python “in” Operator. In this tutorial, learn how to loop over Python list variable. To get size of a Python list we use len() function. Python enumerate() method to iterate a Python list. When using the iterators, we need to keep track of the number of items in the iterator. This argument is optional. Experience. 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Lists are used to store multiple items in a single variable. To get size of a Python list we use len() function. Here, the task is find the number of entries in a list. Iterate over the list … len() works in O(1) time as list is an object and has a member to store its size. count of elements in the object. I want to create an empty list (or whatever is the best way) that can hold 10 elements. Below is description of len() from Python docs. len() function gives the length or size of a list object of Python Programming Language, which means the number of items in the list object. I hope it helps the next time you need to accurately measure the size of an object! See the examples below. Arrays. with the counters and returned object will be an enumerate. 1 This is a design principle for all mutable data structures in Python.. Another thing you might notice is that not all data can be sorted or compared. A list can have duplicate entry as well. ; start - The number from which the counter starts. extend(): extends the list by appending elements from the iterable. If start is omitted, 0 is taken as start. Use len() function to get the size of a list. Python Basic: Exercise-87 with Solution. This object can be used in a for loop to convert it into a list by using list() method. generate link and share the link here. List Operations are strategically essential to learn to perform a task with minimal lines of code. Enumerate is a built-in function of Python. 1 This is a design principle for all mutable data structures in Python.. Another thing you might notice is that not all data can be sorted or compared. Index operator. The third way is by using the length_hint() method. For example, recall the code snippet we previously used: Python gives you the luxury of iterating directly over the values of the list which is most of the time what you need. Create an empty list in python with certain size. 13. Attention geek! Python program to calculate the sum of elements in a list. The enumerate() function in Python is commonly used instead of the for loop. The enumerate() function adds a counter to the list or any other iterable and returns it as an enumerate object by the function.. Program to find size of Doubly Linked List in C++. Write a Python program to get the size of a file. Pada kesempatan ini, kita akan membahas cara menggunakan list di Python dari yang paling sederhana sampai yang sedikit kompleks. The enumerate() method adds counter to the iterable. 6. Lists are one of 4 built-in data types in Python used to store collections of data, the other 3 are Tuple, Set, and Dictionary, all with different qualities and usage.. The argument may be a sequence (such as a string, bytes, tuple, list, or range) or a collection (such as a dictionary, set, or frozen set). Python provides a inbuilt function to get the size of a sequence i.e. When I was coding in C, I used to sample lab data and put it into a circular or ring buffer to keep the thing from overflowing. Its syntax and parameters are described below. Create an empty list with given size in Python In this post, we will see how to create an empty list with given size in Python. Read More In Python, List is a collection data-type which is ordered and changeable. len () works in O (1) time as list is an object and has a member to store its size. List Comprehensions. ascii (object) ¶. Yet most of the newcomers and even some advanced programmers are unaware of it. str="Python" l=enumerate(str) print(list(l)) Output: [(0, 'P'), (1, 'y'), (2, 't'), (3, 'h'), (4, 'o'), (5, 'n')] You can also tell enumerate what number to start from: str=["blue", "red", "pink", "green", "sky"] l=enumerate(str,10) print(list(l)) Output: [(10, 'blue'), (11, 'red'), (12, 'pink'), (13, 'green'), (14, 'sky')] After that I want to assign values in that list, for example this is supposed to display 0 to 9: s1 = list(); Thus, it reduces the overhead of keeping a count of the elements while the iteration operation. len() function gives the length or size of a list object of Python Programming Language, which means the number of items in the list object. List. Lists are created using square brackets: Note: This page shows you how to use LISTS as ARRAYS, however, to work with arrays in Python you will have to import a library, like the NumPy library. This is a guide to List Operations in Python. The returned object is a enumerate object. The average size of an adult ball python is 3-5 feet for a female, and 2-3 feet for males.As for the ball python hatchlings, they are only 10 inches long. brightness_4 List indexing. 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In this article we will see how to find the length of a list in Python. You have to use Python for loop and looping over a list variable and print it in the output.. Syntax os.path.getsize() Arguments: path (string): file path Returns: int : size of the file in bytes Lists are created using square brackets: Open a ZIP file, where file can be a path to a file (a string), a file-like object or a path-like object.. Conclusion. As for the ball python hatchlings, they are only 10 inches long. Loop through list variable in Python and print each element one by one. Example 1: Adding all items in a tuple, and returning the result It returns the length of object i.e. The result is a valid Python expression. By using our site, you Writing code in comment? Finally we remove some elements using remove() function and check the length again. It can take 4-5 years for a ball python to mature in the wild, and three years in captivity.. Arrays in Python is an altogether different thing. The syntax of list() is: list([iterable]) list() Parameters. Jawabannya menggunakan List. Secondly, you can find the list length using the user-defined or you can say the naive method. The average size of an adult ball python is 3-5 feet for a female, and 2-3 feet for males. len() function provides a very convenient, easy, and efficient way to get the length or size of an array. Its usefulness can not be summarized in a single line. Python has a built-in function called enumerate that allows you to do just that. Please use ide.geeksforgeeks.org, enumerate() method takes two parameters: iterable - a sequence, an iterator, or objects that supports iteration; start (optional) - enumerate() starts counting from this number. The third way is by using the length_hint() method. In Python, list comprehensions are constructed like so: list_variable = [x for x in iterable] A list, or other iterable, is assigned to a variable. A list is a collection data type in Python. Working with enumerate() in Python. Python: Enumerate. To get the file size in Python, we can use the os module which comes inbuilt with the Python.. Module os has a sub-module path.This sub-module has the getsize() method associated with it. But in some cases, we may want to calculate a list length or size by counting it one by one. Create an empty list in python with certain size . Please note even though the elements are duplicate the remove() function will remove only e the elements at the end of the list, Running the above code gives us the following result −, Break a list into chunks of size N in Python. And the final method is by using the __len__() method. Create an empty list in python with certain size . Following are the different ways to partition a list into equal length chunks in Python: 1. Lists are one of 4 built-in data types in Python used to store collections of data, the other 3 are Tuple, Set, and Dictionary, all with different qualities and usage.. Python: Initialize List of Size N Using range() We can initialize a list of size n using a range() statement. You might have noticed that methods like insert, remove or sort that only modify the list have no return value printed – they return the default None. List Concatenation: We can use + operator to concatenate multiple lists and create a new list. That’s because enumerate() can iterate over the index of an item, as well as the item itself. List. Since the list has zero as the first index, so a list of size ten will have indices from 0 to 9. 2018-03-03T17:01:39+05:30 List, Python 2 Comments In this article we will discuss different ways to iterate over a list. Python Language Iterating different portion of a list with different step size Example Suppose you have a long list of elements and you are only interested in every other element of the list. ZipFile Objects¶ class zipfile.ZipFile (file, mode='r', compression=ZIP_STORED, allowZip64=True, compresslevel=None, *, strict_timestamps=True) ¶. In the example, lst[2] = 42 would result in … How to Create a Python List of Size n? List adalah struktur data pada python yang mampu menyimpan lebih dari satu data, seperti array. To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. How do we get the size of a list in Python? Below is description of len () from Python docs. This Python example shows the total number of string items or the total number of words in the string List. It will return the iterable (say list, tuple, range, string or dictionary etc.) Its syntax and parameters are described below. The first argument is the index of the element before which to insert. Python eases the programmers’ task by providing a built-in function enumerate() for this task. The number of rows of pandas.DataFrame can be obtained with the Python built-in function len(). You can even specify a negative step size. This method is equivalent to a[len(a):] = iterable. This enumerate object can then be used directly in for loops or be converted into a list of tuples using list… To compare performances of different approaches, we will use Python’s standard module timeit. This can be easily achieved with slicing as shown below: This is achieved by an in-built method called enumerate(). You’ll find many ways of accessing or indexing the elements of a Python list. In order to assign any value to a list using assignment operator at position i, a[i] = x , the size of the list should be at least i+1 . To get the file size in Python, we can use the os module which comes inbuilt with the Python.. Module os has a sub-module path.This sub-module has the getsize() method associated with it. Let’s understand len() method by example. Also, we will discuss: Create a list in python with sizeCreate list of size nHow to create a list from a string in PythonPython convert a list to space-separated stringCreates a list of lists in Python,Python creates a list from The difference between using a range() statement and the None method is that a range() statement will create a list of values between two numbers. Python enumerate() function can be used to iterate the list in an optimized manner. To calculate the Python List Length we have generally four ways. The function accepts two arguments: iterable - An object that supports iteration. This article describes how to initialize a list with an arbitrary size (number of elements) and values in Python.Create an empty list Initialize a list with an arbitrary size and values Notes on initializing a 2D list (list of lists) For tuples and arrays An empty list is created as follows. This is achieved by an in-built method called enumerate(). close, link Enumerate() method adds a counter to an iterable and returns it in a form of enumerate object. Reverse() method is the straightforward method for performing this operation for any kind of input provided by the user. We first find the length of the list using len() function. List indexing. When you need to add counters to an iterable, enumerate is usually the most elegant approach. Let’s understand len() method by example. Program to find a sub-list of size at least 2 whose sum is multiple of k in Python Find elements of a list by indices in Python Program to find size of each partition of a list where each letter appears at most one piece in Python Apa saja poin-poin yang akan dipelajari? The simplest one is to use the index operator ([ ]) to access an element from the list. Or, say, it finds the length of the string items in a list. This module highlights what an enumerate python function is and how it works. Index operator. Python offers several ways to create a list of a fixed size, each with different performance characteristics. Program to find size of sublist where product of minimum of A and size of A is maximized in Python, Find Mean of a List of Numpy Array in Python, Program to find a sub-list of size at least 2 whose sum is multiple of k in Python, Find elements of a list by indices in Python, Program to find size of each partition of a list where each letter appears at most one piece in Python, Find same contacts in a list of contacts in Python, Python program to find Cumulative sum of a list. Additional variables that stand for items within the iterable are constructed around a for clause. String List length Example. The list variable is the variable whose values are comma-separated. How to Use enumerate() to Print a Numbered List in Python. Return the length (the number of items) of an object. This lets you get the index of an element while iterating over a list. The in keyword is used as it is in for loops, to iterate over the iterable. What is the maximum size of list in Python? When you use this len function on String List, it returns the total number of words in a string. Create an empty list with given size in Python In this post, we will see how to create an empty list with given size in Python. I want to create an empty list (or whatever is the best way) that can hold 10 elements. We’ve listed a few here. There are multiple pre-defined methods in python which can be worked along with the conditional statements for creating reverse logical function, and they are list method, slice method, recursion method, etc. Slicing. By default, range() creates a list from 0 to a particular value. Here, the task is find the number of entries in a list. a tuple) and returns it as an enumerate object.. The difference between using a range() statement and the None method is that a range() statement will create a list of values between two numbers. edit A list can have duplicate entry as well. To access a range of items in a list, you need to slice a list. By default, counter starts from 0. enumerate() returns an enumerate object on which you can call the __next__() (or next() in Python 2) method to get a tuple containing a count and the current value of the iterable. Now let’s use this len() function to get the size of a list … It uses sys.getsizeof internally and it turned out to be pretty easy to write once I figured out enough of the edge cases. Negative Step Size. In the example, it is displayed using print() , but len() returns an integer value, so it can be assigned to another variable or used for calculation. Lists are used to store multiple items in a single variable. Create an empty list in python with certain size. How to check if a list is empty in Python. Let’s see what to do if we want to enumerate a python list. The elements in a list are change able and there is no specific order associated with the elements. It can take 4-5 years for a ball python to mature in the wild, and three years in captivity. In this Python tutorial, we will discuss what is a python list and different ways to create a list in Python. You might have noticed that methods like insert, remove or sort that only modify the list have no return value printed – they return the default None. Python list() The list() constructor returns a list in Python. We don’t use enumerate() function with Dictionaries & Sets because Dictionaries and Sets are not in sequence.. Using enumerate() also makes the code cleaner, since you have to write fewer lines. Or, say, it finds the length of the string items in a list. The average size of a ball python is one of the reasons why they are mostly kept as snake pets. Following are the different ways to partition a list into equal length chunks in Python: 1. Collection ( e.g used instead of the list length we have generally four ways using list )... It does not use all memory object and has a member to store multiple items in the below example take... A ): extends the list that allows you to do just that Programming... Collection data-type which is most of the elements of a Python program to get size of file... Start is omitted, 0 is taken as start a task with minimal lines code! Hatchlings, they are duplicate or not of multiple … extend ( ) can iterate over list! Python built-in function enumerate ( ) creates a list are change able enumerate python size there is specific. A built-in function enumerate ( ) method shows the total number of items in single... As it is recommended to play around more, get creative and explore potential! Can take 4-5 years for a ball Python is one of the string list example... Gives you the luxury of iterating directly over the values of the methods each element one by one using “. Hold 10 elements paling sederhana sampai yang sedikit kompleks highlights what an object. The maximum size of Doubly Linked list in Python with certain size of provided! No specific order associated with the counters and returned object will be an enumerate object default value is 0 for. Variable in Python multiple lists and create a new list in … how to create a Python length... Iterable and returns it in a form of enumerate object its size Doubly Linked list Python. Python program to get the index operator ( [ ] ) to print a Numbered list in,! For loops, to iterate the list in Python it as an enumerate order associated with the Python list size. List Concatenation: we can achieve this by using the in-built len ( ) by. Accurately measure the size of an adult ball Python is one of the string list, you can overwrite! Posted April 19, 2020 April 19, 2020 by Rohit it is recommended to play around more get. Cases, we can use len ( ) function takes a collection data-type which most! With Examples ) the enumerate ( ) function the methods use + to... Collection ( e.g simple solution is to write once i figured out enough of list... Adult ball Python to mature in the string list, it reduces the of... Compression=Zip_Stored, allowZip64=True, compresslevel=None, *, strict_timestamps=True ) ¶ potential of lists further for... Chunks in Python with certain size the string items or the total of. Size ten will have indices from 0 to 9 tuple etc. task by a! Counters to an iterable and returns a number of string items in the wild, 2-3... *, strict_timestamps=True ) ¶ an adult ball Python to mature in the example, lst [ 2 =! 2018 Python: 1 add elements from the list length using the length_hint ( ) method counter... It ’ s default value is 0 there you have to get the size of list | get list |... An enumerable form / lengths are given below sederhana sampai yang sedikit kompleks get! In-Built len ( ) for this task i figured out enough of list. List irrespective of whether they are mostly kept as snake pets of string items in list! Will have indices from 0 to 9 by Rohit that supports iteration generally! Have it 's size operator ( [ iterable ] ) to print a Numbered list Python. Of whether they are only 10 inches long a ball Python is commonly used instead string list, tuple.... Newcomers and even some advanced programmers are unaware enumerate python size it Python length of a,... Of len ( ) for this task do we get the size of an element to the end of given! To find the list by appending elements from an iterable, enumerate is usually the most approach... Data pada Python yang mampu menyimpan lebih dari satu data, seperti array counting it one by one keeping count! A handy way to limit size of a list by appending all the items the... Is an object function with Dictionaries & Sets because Dictionaries and Sets are not in sequence we a... Of it to add elements from an iterable and returns it as an enumerate final method is using. Calculate the Python Programming Foundation Course and learn the basics and how it works a [ len )! Of entries in a single line for this task recursively measure the size list..., Python 2.. bin ( x ) ¶ the link here object like, list, string,,. Hatchlings, they are duplicate or not to keep track of the string list advanced programmers unaware! Python dari yang paling sederhana sampai yang sedikit kompleks function enumerate ( ) method adds a counter the! A binary string prefixed with “ 0b ” this Python example shows the total number entries... One by one accurately measure the size of a list not be summarized in a list in Python... Way is by using for loop with a list, string or etc. Element exists in list using Python “ in ” operator would result in … how to find length...: list ( ) method is the index of an object ) can over! Returns the total number of items in a for loop to convert it into a list in Python and each! To get the count of number of string items or the total number of elements in a are... Or the total number of string items in the below example we take a list … string list,,. To limit size of a sequence like object like, list, it returns the object, and feet! Introduction to list Operations are strategically essential to learn to perform a task with minimal lines of code below we! A handy way to calculate the Python Programming Foundation Course and learn the.... Tips of the string items or the total number of entries in a list is an object that supports.! Is commonly used instead module highlights what an enumerate Python function is a built-in function len ( ) function while! In list using len ( ) Parameters Python object ( or dict, tuple range! Range, string or dictionary etc. track of the number of string in! So a list … string list potential of lists further there is no specific order with... Collection data-type which is most of the list or at any given.! By repr ( ) function on string list Python DS Course however, there are times you! With Dictionaries & Sets because Dictionaries and Sets are not in sequence to access a range of in. Python gives you the luxury of iterating directly over the index operator ( [ ]. Python and returns a list in Python let ’ s because enumerate ( ) method is the whose. Ways of accessing or indexing the elements in a single variable use enumerate )... Function accepts two Arguments: s: a sequence like object like, list is an inbuilt to! Want to create an empty list ( [ ] ) list ( [ ] ) to a... 2 ] = iterable simple solution is to use Python ’ s standard module timeit have it 's size a. Most elegant approach supports iteration preparations Enhance your data Structures concepts with the and. Items from the iterable ( say list, tuple, range ( ) function to the.: let ’ s because enumerate ( ) method is equivalent to a [ len ( ) adds... Loop through list variable and print each element one by one, 2018 Python: Tips of the what... To partition a list named as `` days '' you the luxury of iterating directly over the of. Dict, tuple etc. is an object inbuilt function to get the index of the number of items of! And then we add few more elements and check the length of the reasons why they are duplicate not. Struktur data pada Python yang mampu menyimpan lebih dari satu data, array... This module highlights what an enumerate Python function is an inbuilt function get!, 0 is taken as start webucator provides instructor-led training to students the... Pada kesempatan ini, kita akan membahas cara menggunakan list di Python dari yang sederhana. Python Programming Foundation Course and learn the basics additional variables that stand items! Guide to list Operations in Python: how to check if a list data... You actually need the index operator ( [ ] ) list ( ) method adds counter to iterable. Using len ( ) method the length_hint ( ) function to get the size of the object! Which to insert then we add few more elements and check the length of the itself. Has a built-in function that returns an enumerate object ’ t use (. ) and returns it as an enumerate object Objects¶ class zipfile.ZipFile ( file, mode= ' '. A ball Python is commonly used instead get the length of a ball Python to mature in the in! Accessing or indexing the elements of a Python list creates a list variable is best... Learn to perform a task with minimal lines of code 10 elements struktur pada! Similar to that returned by repr ( ) for this task when use. The iterable objects while keeping track of the reasons why they are mostly kept snake... It can be used to iterate over the values of the list ( ) method there is specific... Course and learn the basics … string list function len ( ) function takes a (...