Thus, it reduces the overhead of keeping a count of the elements while the iteration operation. Secondary to this, understanding how a Python for loop works under the hood will ultimately help in designing a user-defined custom-object that can be iterated over. So, we’ll be using the for loop again to iterate on each element in the list and write it to the file. It is easy, and the loop itself only needs a few lines of … Python’s built-in enumerate function allows us to loop over a list and retrieve both the index and the value of each item in the list: 1 2 3 presidents = [ "Washington" , "Adams" , "Jefferson" , "Madison" , "Monroe" , "Adams" , "Jackson" ] for num , name in enumerate ( presidents , start = … How to iterate through a nested List in Python? For those of us who work in languages like Java or C, we’re used to being stuck with the following syntax: Luckily, Python has a much cleaner s… As you can see, the list … Python Loops. The print commands write the element to the opened file. Iterables. Rather than iterating through a range(), you can define a list and iterate through that list. Square brackets [] are commonly used in Python to create empty lists because it is faster and more concise. In Python, the list is an array-like data structure which is dynamic in size. The steps below will show you how to create a while loop in Python to loop through a list. Method #6: Using NumpyFor very large n-dimensional lists (for example an image array), it is sometimes better to use an external library such as numpy. Python – continue keyword and loops; Python : Convert list of lists or nested list to flat list; Python : Yield Keyword & Generators explained with examples; 5 Different ways to read a file line by line in Python; How to create and initialize a list of lists in python? Lists and For Loops in Python. Unlike Sets, lists in Python are ordered and have a definite count. In Python, there is not C like syntax for(i=0; i