Historically, programming languages have offered a few assorted flavors of for loop. These are briefly described in the following sections. Example 1: Iterating through a string Using for Loop The first thing that comes in mind would be using for loop. Lists and For Loops in Python. To get a list of tuples, use list(zip(foo, bar)).And to zip until both iterators are exhausted, you would use itertools.zip_longest. and perform the same action for each entry. For example, a for loop would allow us to iterate through a list, performing the same action on each item in the list. Syntax: for var_name in input_list_name: Example: lst = [10, 50, 75, 83, 98, 84, 32] for x in lst: print(x) Output: 10 50 75 83 98 84 32 for x in [10,20,30,40,50,60]: print(x) The output of the above code is - 10 20 30 40 50 60 Accessing Python Tuples. In this example, each time through the loop, the variable position is used as an index into the list, printing the position-eth element.Note that we used len as the upper bound on the range so that we can iterate correctly no matter how many items are in the list.. Any sequence expression can be used in a for loop. List Comprehension vs For Loop in Python. This is what I have so far: newlist = [] for x in range(10): for y in range(10): newlist.append(y) and at this point I am stumped. Iterate through list in Python using a for Loop. Loops are an incredibly useful tool that are used to perform repetitive processes with Python lists. Python For Loop for Numbers Many simple “for loops” in Python can be replaced with list comprehensions. I'm trying to populate a list with a for loop. Python’s easy readability makes it one of the best programming languages to learn for beginners. I was hoping the loops would give me a list of 10 lists. Since Python list is a collection of elements and all these elements can be accessed using its index values, thus list items can be accessed using for loop also. Handling List-of-Lists in Python For Loop; The following is the general syntax for the python for loop: for {variable} in {some-sequence-type}: {python-statements} else: {python-statements} In python, the for loop can iterate through several sequence types such as lists, strings, tuples, etc. A Survey of Definite Iteration in Programming. We will nest all lists with 3 for and then print them to the console. 2. Suppose, we want to separate the letters of the word human and add the letters as items of a list. For example, the range function returns a sequence of integers. For loops in python are really "for each" loops. Nested Loop With Multiple Lists. A good example of this can be seen in the for loop.While similar loops exist in virtually all programming languages, the Python for loop is easier to come to grips with since it reads almost like English.. Python 3 for f, b in zip(foo, bar): print(f, b) zip stops when the shorter of foo or bar stops.. In Python 3, zip returns an iterator of tuples, like itertools.izip in Python2. Python 2 In this part we will examine nested for loops with multiple lists. Python for loop can be used to iterate through the list directly. There are different use cases for nested for loops in Python. Definite iteration loops are frequently referred to as for loops because for is the keyword that is used to introduce them in nearly all programming languages, including Python.. Accessing Python List. The technique we’ve just learned is called a loop. 1. Because we always start with for (like in for some_variable in some_list:), this technique is known as a for loop. Read it as "for each value 'i' in list 'L', do...". In the context of most data science work, Python for loops are used to loop through an iterable object (like a list, tuple, set, etc.) These are the structural parts of a for loop: In this example we have lists named name , car , number .