python iterate two lists different length

One solution could be using a third list that contains all the elements of the two original lists. If given lists of different lengths, the resulting combination will only be as long as the smallest list passed. ', '? If you take advantage of this feature, then you can use the Python zip() function to iterate through multiple dictionaries in a safe and coherent way: Here, you iterate through dict_one and dict_two in parallel. No spam ever. Spellcaster Dragons Casting with legendary actions? Therefore, the space complexity is also constant. Unexpected results of `texdef` with command defined in "book.cls", Existence of rational points on generalized Fermat quintics. Similarly, the space complexity is also constant, as the code only creates three tuples with three elements each, and the number of tuples created is also fixed and does not depend on the input size. New external SSD acting up, no eject option. You can also iterate through more than two iterables in a single for loop. In this approach, the zip() function takes three generator expressions as arguments. Iterating through two lists with different lengths Ask Question Asked Viewed 93 times 0 I am trying to iterate through two lists with different lengths and compare the strings inside them, but I keep getting this TypeError "list indices must be integers or slices, not str". So, the expected output is 1, x and 2, y. The zip_longest() function is a replacement of the map() function available in Python version 2. python, Recommended Video Course: Parallel Iteration With Python's zip() Function. Process of finding limits for multivariable functions, Put someone on the same pedestal as another, How to turn off zsh save/restore session in Terminal.app, Use Raster Layer as a Mask over a polygon in QGIS. This lets you iterate through all three iterables in one go. These are all ignored by zip() since there are no more elements from the first range() object to complete the pairs. Can members of the media be held legally responsible for leaking documents they never agreed to keep secret? Method 1: Using For loop We can iterate over a list in Python by using a simple For loop. Is a copyright claim diminished by an owner's refusal to publish? Then after exhaustion, again 1st list starts from a, with elements left in 2nd list. Apart from the zip() function, Python also offers us the map() function to iterate over multiple lists until all the list elements are exhausted. For example, the map() function tried to map element 3 of list01 with an element at the similar index (position) of list02. This will allow you to sort any kind of sequence, not just lists. zip() and its sibling functions can accept more than two lists. In Python 3, you can also emulate the Python 2 behavior of zip() by wrapping the returned iterator in a call to list(). The zip function accepts multiple lists, strings, etc., as input. Finding valid license for project utilizing AGPL 3.0 libraries. For each element, append it to the end of original_list1 using the append() method.4. Actually making the third list a set would be better. Syntax: import itertools According to the official documentation, Pythons zip() function behaves as follows: Returns an iterator of tuples, where the i-th tuple contains the i-th element from each of the argument sequences or iterables. Iterate Through List in Python Using For Loop. Sometimes, you might need to build a dictionary from two different but closely related sequences. Is there a way to use any communication without a CPU? The Python zip () function makes it easy to also zip more than two lists. Another way to have your desired output using zip(): You could use itertools.izip_longest and filter(): How it works: izip_longest() aggregates the elements from two lists, filling missing values with Nones, which you then filter out with filter(). This object yields tuples on demand and can be traversed only once. How to iterate over files in directory using Python? This will run through the iterator and return a list of tuples. Here, this function accepts the two lists as input, maps the data elements of both the lists position-wise, and then returns an iterator object, the tuple of data elements of both the lists. How to upgrade all Python packages with pip, Get difference between two lists with Unique Entries. Then, as long as we remember to increment our index, we'll be able to lookup the same index for both lists. This works exactly like you'd expect, meaning you just only need to pass in the lists as different arguments. Asking for help, clarification, or responding to other answers. By using our site, you Then we could sort the new list and while iterating over it, we could check the existence of elements of the third list in the original ones. Could a torque converter be used to couple a prop to a higher RPM piston engine? We take your privacy seriously. Hi I would like to compare two list that are different lengths and print a sorted table with items that are missing in each table. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, How to iterate in Python through two lists with different length in paralell? Sorting is a common operation in programming. Connect and share knowledge within a single location that is structured and easy to search. Consider the example below. In Python 2.x, zip() and zip_longest() used to return list, and izip() and izip_longest() used to return iterator. Which is faster and why? Pythons zip() function is defined as zip(*iterables). Suppose that John changes his job and you need to update the dictionary. I overpaid the IRS. First, we find the length of both lists, and using the min() function we take the shorter length to make sure that each item from both lists is paired correctly. Not the answer you're looking for? This tutorial explains how to iterate through two lists/tuples at the same time in Python. To learn more, see our tips on writing great answers. Why? A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Does Chain Lightning deal damage to its original target first? He's an avid technical writer with a growing number of articles published on Real Python and other sites. Leodanis is an industrial engineer who loves Python and software development. If you call zip() with no arguments, then you get an empty list in return: >>> You can loop through the list items by using a while loop. Thus, we see the output pair (3, None). The zip() function then iterates over the two lists in parallel only 2 times the length(list02)=2. Otherwise, your program will raise an ImportError and youll know that youre in Python 3. (Tenured faculty). How small stars help with planet formation. [duplicate]. This function creates an iterator that aggregates elements from each of the iterables. To do this, you can use zip() along with .sort() as follows: In this example, you first combine two lists with zip() and sort them. Iterating one after another is an option, but it's more cumbersome and a one-two liner is always recommended over that. Does Python have a string 'contains' substring method? Python3 test_list1 = [1, 4, 5] test_list2 = [3, 8, 9] print ("Original list 1 : " + str(test_list1)) In Python 3.x, there izip() and izip_longest() are not there as zip() and zip_longest() return iterator. What I want to obtain is something similar to this: 1,4 2,5 3,6 ,7 I have thought of using the zip function but it doesn't seem to work with different length lists as by using the following code: for l1, l2 in list1, list2: print (l1,l2) I get this: 1,4 2,5 3,6 Using an OrderedDict seems to do the job: You can do the same using list comprehension! If one of the lists gets exhausted of elements, it replaces them with None. How do I concatenate two lists in Python? To iterate over two lists in Python, you can use the zip() function and a for loop. Content Discovery initiative 4/13 update: Related questions using a Machine How do I merge two dictionaries in a single expression in Python? What to do during Summer? Pairs will be padded with None for lists of mismatched length. python Share Improve this question zip() can accept any type of iterable, such as files, lists, tuples, dictionaries, sets, and so on. After applying the specified function, it maps the iterable data elements and returns a tuple after mapping the values. Get a short & sweet Python Trick delivered to your inbox every couple of days. How can I make inferences about individuals from aggregated data? While inside the loop, we store our information in variables and increment `index`python. Find centralized, trusted content and collaborate around the technologies you use most. For a more general solution, you can see here. Can we create two different filesystems on a single partition? There are multiple ways to iterate over a list in Python. Ways to Iterate Through List in Python. 20122023 RealPython Newsletter Podcast YouTube Twitter Facebook Instagram PythonTutorials Search Privacy Policy Energy Policy Advertise Contact Happy Pythoning! Sometimes we need to find the differences between two lists. In Python 3.x, there izip () and izip_longest () are not there as zip () and zip_longest () return iterator. Curated by the Real Python team. The remaining elements in any longer iterables will be totally ignored by zip(), as you can see here: Since 5 is the length of the first (and shortest) range() object, zip() outputs a list of five tuples. Making statements based on opinion; back them up with references or personal experience. Use different Python version with virtualenv. rev2023.4.17.43393. Loop over each element in original_list2.3. Also you use insert a lot. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. One solution could be using a third list that contains all the elements of the two original lists. Lists of different lengths are never equal. The zip () function will only iterate over the smallest list passed. Another approach to iterate over multiple lists simultaneously is to use the enumerate() function. In this case, youll simply get an empty iterator: Here, you call zip() with no arguments, so your zipped variable holds an empty iterator. Then, you use the unpacking operator * to unzip the data, creating two different lists (numbers and letters). If you need to iterate through multiple lists, tuples, or any other sequence, then its likely that youll fall back on zip(). 2. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Is the amplitude of a wave affected by the Doppler effect? With this function, the missing values will be replaced with whatever you pass to the fillvalue argument (defaults to None). Input : test_list1 = [3, 8, 7], test_list2 = [5, 7, 3, 0, 1, 8]Output : [3, 5, 8, 7, 7, 3, 3, 0, 8, 1, 7, 8]Explanation : Alternate elements from 1st list are printed in cyclic manner once it gets exhausted. One such case is if you have two lists and want to iterate over both lists at the same time in Python. You can process adjacent items from the lists by using itertools.zip_longest() (itertools.izip_longest() if using Python 2) to produce a sequence of paired items. The iteration will continue until the longest iterable is exhausted: Here, you use itertools.zip_longest() to yield five tuples with elements from letters, numbers, and longest. How to upgrade all Python packages with pip, Get difference between two lists with Unique Entries, Iterate through multiple lists and a conditional if-statement. The default fillvalue is None, but you can set fillvalue to any value. How can I detect when a signal becomes noisy? Even more specific to your question, use fillvalue with zip_longest: Check zip_longest() from itertools (a very useful module in Python Standard Library), Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The list uses comma-separated values within square brackets to store data. Time Complexity: O(n2)Auxiliary Space: O(n), Method #2 : Using chain() + zip() + cycle(). zip() can receive multiple iterables as input. Can a rotating object accelerate by changing shape? from itertools import chain, zip_longest def twolists(l1, l2): return [x for x . If a people can travel space via artificial wormholes, would that necessitate the existence of time travel? With a single iterable argument, it returns an iterator of 1-tuples. Can we create two different filesystems on a single partition? Now its time to roll up your sleeves and start coding real-world examples! Let's discuss certain ways in which this task can be performed. Example Get your own Python Server In Python 3, however, zip() returns an iterator. This composes a list comprehension using zip_longest from itertools (which is part of the standard library) to interleave items from both lists into a tuple, which by default uses None as the fillvalue.. But I am unable to also print the values that are missing in list_1 from list_2, the letter 'z'. What sort of contractor retrofits kitchen exhaust ducts in the US? Content Discovery initiative 4/13 update: Related questions using a Machine Flatten an irregular (arbitrarily nested) list of lists, How to get the Cartesian product of multiple lists. (The pass statement here is just a placeholder.). It accepts iterable objects such as lists and strings as input. Remember to increase the index by 1 after each iteration. 6 Ways to Iterate through a List in Python. To do this, you can use zip() along with the unpacking operator *, like so: Here, you have a list of tuples containing some kind of mixed data. Python3 list = [1, 3, 5, 7, 9] for i in list: print(i) Output: 1 3 5 7 9 C++ Programming - Beginner to Advanced; Java Programming - Beginner to Advanced; C Programming - Beginner to Advanced; Web Development. Making statements based on opinion; back them up with references or personal experience. I could iterate on this function to combine ever more lists. Why are parallel perfect intervals avoided in part writing when they are so common in scores? I just threw it into a function like: I have updated the description outlining a more general problem - could this solution be easily modified? The length of the resulting tuples will always equal the number of iterables you pass as arguments. Upon testing the answer I had previously selected, I realized I had additional criteria and a more general problem. 7 Ways You Can Iterate Through a List in Python 1. What could a smart phone still do or not do and what would the screen display be if it was sent back in time 30 years to 1993? rightBarExploreMoreList!=""&&($(".right-bar-explore-more").css("visibility","visible"),$(".right-bar-explore-more .rightbar-sticky-ul").html(rightBarExploreMoreList)), Python | Interleave multiple lists of same length, Python - Sum of different length Lists of list, Python | Merge corresponding sublists from two different lists, Python Program to Split the Even and Odd elements into two different lists, Python | Sum two unequal length lists in cyclic manner, Python - Convert Lists into Similar key value lists, Python | Program to count number of lists in a list of lists. In Python 2, zip() returns a list of tuples. In these cases, the number of elements that zip() puts out will be equal to the length of the shortest iterable. If lists have different lengths, zip() stops when the shortest list end. Alternatively, if you set strict to True, then zip() checks if the input iterables you provided as arguments have the same length, raising a ValueError if they dont: This new feature of zip() is useful when you need to make sure that the function only accepts iterables of equal length. In the following code example, list_two contains more elements than list_one so the resulting merged list will only be as long as list_one. Use different Python version with virtualenv. To learn more, see our tips on writing great answers. Well also see how the zip() return type is different in Python 2 and 3. zip() function accepts multiple lists/tuples as arguments and returns a zip object, which is an iterator of tuples. Note that with Python 3 and above versions, the zip() function returns an iterator value while the izip() function stands to be obsolete. With this trick, you can safely use the Python zip() function throughout your code. If you use zip() with n arguments, then the function will return an iterator that generates tuples of length n. To see this in action, take a look at the following code block: Here, you use zip(numbers, letters) to create an iterator that produces tuples of the form (x, y). Complete this form and click the button below to gain instantaccess: No spam. Then you can simplify the code in the body of the loop by flattening the sequence of paired items and filtering out the None values, and in your case, 0 values. Join us and get access to thousands of tutorials, hands-on video courses, and a community of expertPythonistas: Master Real-World Python SkillsWith Unlimited Access to RealPython. How to provision multi-tier a file system across fast and slow storage while combining capacity? Pythons zip() function allows you to iterate in parallel over two or more iterables. Let us study them one by one below: Using for loop. A convenient way to achieve this is to use dict() and zip() together. That does provide the missing value but not sure how I would make that part of the table during the for loop. Its possible that the iterables you pass in as arguments arent the same length. Also, we can create the nested list i.e list containing another list. When youre working with the Python zip() function, its important to pay attention to the length of your iterables. basics In this case, you can use dict() along with zip() as follows: Here, you create a dictionary that combines the two lists. Use the len () function to determine the length of the list, then start at 0 and loop your way through the list items by referring to their indexes. We have two lists for iteration indicated in the code. Method #1 : Using loop + + operator The combination of above functionalities can make our task easier. Connect and share knowledge within a single location that is structured and easy to search. The iteration stops when the shortest input iterable is exhausted. Define original_list1 and original_list2.2. The map() function accepts iterable data structures such as lists and strings as input along with a function. rightBarExploreMoreList!=""&&($(".right-bar-explore-more").css("visibility","visible"),$(".right-bar-explore-more .rightbar-sticky-ul").html(rightBarExploreMoreList)), Loop or Iterate over all or certain columns of a dataframe in Python-Pandas. What is the etymology of the term space-time. For example: merge_lists([1,2,3,4], [1,5]) = [[1,1], [2,5], [3], [4]]. And how to capitalize on that? If you forget this detail, the final result of your program may not be quite what you want or expect. Python Server Side Programming Programming. Youve also coded a few examples that you can use as a starting point for implementing your own solutions using Pythons zip() function. Thus the process will be more efficient. How do I concatenate two lists in Python? It maps the data values of lists according to the index and returns an iterable object, the tuple of the mapped elements. How do I concatenate two lists in Python? This iterator generates a series of tuples containing elements from each iterable. We can iterate over a single Python list using a for loop or a range() function. Find centralized, trusted content and collaborate around the technologies you use most. Is there a way to use any communication without a CPU? Python zip function enables us to iterate over two or more lists by running until the smaller list gets exhausted. Pass both lists to the zip() function and use for loop to iterate through the result iterator. rev2023.4.17.43393. Finally it filters the None items from the list: . it can identify whether the input is a list, string, tuple, etc. We declare a list with some arbitrary values and then loop in the list using any in-built function such as range(). You can call zip() with no arguments as well. Iterating over single lists, refers to using for loops for iteration over a single element of a single list at a particular step whereas in iterating over multiple lists simultaneously, we refer using for loops for iteration over a single element of multiple lists at a particular step. Actually making the third list a set would be better. It iterates over the lists together and maps the elements of both the lists/containers to return an iterator object. But the drawback here is that we might have to concatenate the list and hence would consume more memory than desired. This means that the resulting list of tuples will take the form [(numbers[0], letters[0]), (numbers[1], letters[1]),, (numbers[n], letters[n])]. (Source). The iteration ends with a StopIteration exception once the shortest input iterable is exhausted. He's a self-taught Python developer with 6+ years of experience. Unexpected results of `texdef` with command defined in "book.cls". - Projeto python parte #02, Remove All the Occurrences of an Element From a List in Python, What Is the Difference Between List Methods Append and Extend. Similarly, it iterates over two lists until all the elements of both lists are exhausted. Get tips for asking good questions and get answers to common questions in our support portal. Watch it together with the written tutorial to deepen your understanding: Parallel Iteration With Python's zip() Function. Input : test_list1 = [a, b, c], test_list2 = [5, 7, 3, 0, 1, 8, 4]Output : [a, 5, b, 7, c, 3, a, 0, b, 1, c, 8, a, 4]Explanation : Alternate elements from 1st list are printed in cyclic manner once it gets exhausted. That's what the generator expression below does. What PHILOSOPHERS understand for intelligence? Pythons zip() function can take just one argument as well. Should the alternative hypothesis always be the research hypothesis? So, how do you unzip Python objects? Say you have a list of tuples and want to separate the elements of each tuple into independent sequences. Iterate Through List in Python Using Numpy Module. Syntax: [expression/statement for item in input_list] Example: lst = [10, 50, 75, 83, 98, 84, 32] [print (x) for x in lst] Output: Can you explain what the output should be? However, in Python 3 and above, we can use the zip_longest function to achieve the same result. This means that the tuples returned by zip() will have elements that are paired up randomly. With sorted(), youre also writing a more general piece of code. In fact, this visual analogy is perfect for understanding zip(), since the function was named after physical zippers! For asking good questions and get answers to common questions in our support portal filters the None items from list... Or personal experience sort of contractor retrofits kitchen exhaust ducts in the list uses comma-separated values square! An iterable object, the zip ( ) and its sibling functions can accept more than two and. Run through the iterator and return a list of tuples are exhausted no eject option agree to our terms service... A list in Python and returns an iterator means that the tuples returned by zip ( ) together the function... Lists, strings, etc., as input, clarification, or responding to other.. I could iterate on this function, the letter ' z ' function your... The research hypothesis affected by the Doppler effect build a dictionary from two different lists ( numbers letters! ) stops when the shortest iterable drawback here is just a placeholder. ) * iterables ) lists. We might have to concatenate the list using a third list that contains all the elements each... Parallel perfect intervals avoided in part writing when they are so common in scores a function ) zip... Generalized Fermat quintics you might need to find the differences between two lists with Unique Entries of! And slow storage while combining capacity iterator object end of original_list1 using the append ( ) method.4 combination! Running until the smaller list gets exhausted results of ` texdef ` with command in... Times the length of the two original lists Advertise Contact Happy Pythoning making statements based on ;. Pass as arguments that youre in Python 1 parallel perfect intervals avoided in part writing when they are so in! Different filesystems on a single expression in Python not be quite what you want or.. Lists in parallel over two or more iterables than two lists of 1-tuples alternative hypothesis be!, it returns an iterable object, the zip ( ), since the function was named after zippers. Refusal to publish take just one argument as well multiple lists,,. Unexpected results of ` texdef ` with command defined in `` book.cls '', Existence of time?! Missing value but not sure how I would make that part of the table during the for.... And return a list in Python 3, None ) containing another list ` with command defined in book.cls! And its sibling functions can accept more than two iterables in a single location that is structured and easy also... Function to combine ever more lists by running until the smaller list gets exhausted of elements, it over. From itertools import Chain, zip_longest def twolists ( l1, l2 ): return [ x for.... Stack Exchange Inc ; user contributions licensed under CC BY-SA you forget python iterate two lists different length,... Diminished by an owner 's refusal to publish filesystems on a single Python list a! The dictionary a prop to a higher RPM piston engine by running until the smaller list gets exhausted elements. Analogy is perfect for understanding zip ( ) function allows you to sort any of! Argument ( defaults to None ) packages with pip, get difference between two lists )... To use any communication without a CPU new external SSD acting up, no eject option have two lists want... Related questions using a third list that contains all the elements of both the lists/containers return... Accepts multiple lists simultaneously is to use the Python zip ( ) function, it returns an iterator that elements. With Unique Entries combination will only be as long as the smallest list passed does provide the missing but... Iterables you pass in as arguments on writing great answers Corporate Tower, we create... To store data does provide the missing value but not sure how I make! Python, you might need to find the differences between two lists in Python 2, y references personal. Append it to the zip ( * iterables ) will only be as long list_one... And collaborate around the technologies you use the zip_longest function to combine ever lists... Twitter Facebook Instagram PythonTutorials search Privacy Policy and cookie Policy resulting tuples will always equal the of. Expression in Python by using a third list a set would be better, again 1st starts... To learn more, see our tips on writing great answers means the!: using for loop we can iterate through a list, string, tuple, etc a?! List of tuples containing elements from each iterable his job and you need to find the differences between lists... The pass statement here is just a placeholder. ) a-143, 9th Floor, Sovereign Corporate Tower we. More, see our tips on writing great answers lists until all the elements of both the to., again 1st list starts from a, with elements left in list. Tuples returned by zip ( ) function generalized Fermat quintics shortest list end sites! Self-Taught Python developer with 6+ years of experience be replaced with whatever you pass to the end of original_list1 the... And zip ( ) method.4 does Python have a string 'contains ' substring method time travel ways you can the. # 1: using loop + + operator the combination of above functionalities can make our task easier any... List passed get a short & sweet Python Trick delivered to your inbox every of! Single expression in Python program may not be quite what you want or expect, append to., string, tuple, etc the number of articles published on Real Python and other sites (... For understanding zip ( ) and zip ( ) function will only be as as. ) can receive multiple iterables as input your code exception once the shortest input iterable is.! See the output pair ( 3, however, in Python 2, y elements and an! In these cases, the number of iterables you pass to the index and returns an.! The map ( ) function accepts iterable data structures such as range ( ) will have elements that missing! Not be quite what you want or expect list that contains all the elements of lists... Knowledge within a single partition questions and get answers to common questions in our support portal diminished by owner! Use the zip_longest function to combine ever more lists by running until the smaller list exhausted! More elements than list_one so the resulting tuples will always equal the number of articles published Real! Letter ' z ': parallel iteration with Python 's zip ( will. After applying the specified function, its important to pay attention to the of. Contributions licensed under CC BY-SA in list_1 from list_2, the resulting tuples will always equal the of! Two different lists ( numbers and letters ) index by 1 after each iteration for understanding zip ( ).. To common questions in our support portal lists have different lengths, (! But the drawback here is that we might have to concatenate the list uses comma-separated values within square to... Lists/Tuples at the same time in Python 1 we store our information in variables and `! Use cookies to ensure you have the best browsing experience on our website values and then loop in the?... Discuss certain ways in which this task can be performed testing the Answer I additional... As the smallest list passed questions and get answers to common questions in our support portal over both lists exhausted! Provide the missing value but not sure how I would make that part of the table during for., since the function was named after physical zippers returns an iterator that aggregates elements from each of the elements. In parallel over two lists consume more memory than desired gain instantaccess: spam! This visual analogy is perfect for understanding zip ( ) function accepts multiple lists simultaneously is to use any without! Be padded with None for lists of different lengths, the zip ( ) function accepts iterable structures. Machine how do I merge two dictionaries in a single location that is structured and easy to search elements it! Contact Happy Pythoning method # 1: using for loop Facebook Instagram PythonTutorials search Policy... Allows you to sort any kind of sequence, not just lists fillvalue to any value times length! In Python 3 None for lists of mismatched length Server in Python using... He 's an avid technical writer with a StopIteration exception once the shortest iterable! Realpython Newsletter Podcast YouTube Twitter Facebook Instagram PythonTutorials search Privacy Policy Energy Policy Contact! Not be quite what you want or expect to the index and returns an iterator object kitchen. Since the function was named after physical zippers that aggregates elements from of. ' z ' it can identify whether the input is a list of tuples wave python iterate two lists different length by Doppler... Iterables as input part writing when they are so common in scores such as lists and strings as along! This tutorial explains how to iterate over multiple lists, strings, etc., as input along a! A higher RPM piston engine or more lists during the for loop if lists have different lengths the! For help, clarification, or responding to other answers fast and slow storage while combining?. Values will be replaced with whatever you pass in as arguments slow storage while capacity. Click the button below to gain instantaccess: no spam argument as well Privacy! Are multiple ways to iterate over both lists are exhausted zip_longest def twolists ( l1, l2:... 20122023 RealPython Newsletter Podcast YouTube Twitter Facebook Instagram PythonTutorials search Privacy Policy Energy Policy Advertise Contact Happy!... Importerror and youll know that youre in Python 3 than desired the table during the for or. Intervals avoided in part writing when they are so common in scores be. I realized I had previously selected, I realized I had additional criteria and a for loop some... Discuss certain ways in which this task can be traversed only python iterate two lists different length watch it together with Python!

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