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title: python for loop over two lists - a comprehensive tutorial
introduction:
in python, the for loop is a powerful construct for iterating over elements in a sequence. when working with two lists simultaneously, you might need to iterate over corresponding elements or perform operations that involve pairs of elements from each list. this tutorial will guide you through using a for loop to iterate over two lists in various scenarios, providing clear code examples for better understanding.
scenario 1: iterating over corresponding elements in two lists:
in this example, the zip() function is used to create pairs of corresponding elements from list1 and list2. the for loop then iterates over these pairs, making it easy to work with elements from both lists simultaneously.
scenario 2: performing operations on corresponding elements:
here, the zip() function is again employed to create pairs of corresponding elements. the for loop then multiplies each pair of elements and appends the result to a new list (result_list in this case).
scenario 3: iterating over the longer list with zip_longest:
if the lists are of unequal length, zip_longest is a helpful alternative. the fillvalue parameter fills in the missing values, ensuring the loop continues until the longer list is exhausted.
conclusion:
in this tutorial, you learned how to use a for loop to iterate over two lists in python. whether you need to work with corresponding elements or perform operations on pairs of elements, the zip() function and zip_longest from the itertools module are valuable tools to achieve your goals. experiment with these examples and adapt them to your specific use cases.
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