What is Data Slicing?
Data slicing is the process of accessing a portion or subset of a data stream. This technique is useful when we need to test some sample code, debug the code, or look for logical problems on a large dataset that consumes a lot of memory and takes a long time to execute. In this scenario, we can utilise data slicing to extract a subset of data from the entire dataset and use it for testing.
Data slicing can also be used to slice a huge dataset into smaller bits for faster processing. In short, there are many applications where smaller datasets make the code more efficient, reducing execution time, memory, and screen time.
What is List Slicing?
List slicing is the process of accessing a specified portion or subset of a list for some action while leaving the rest of the list alone. Python's slicing operator accepts three parameters, two of which are optional depending on the situation.
A list slice is a portion of a list that has been extracted and contains the necessary elements. The list slice is a list. A list slice can execute all list operations. List slices are used to copy the required elements to a new list and to alter the list's required components.
List slicing is the process of accessing a specific section or subset of a list for some activity while leaving the remainder of the list alone. Consider a Python list. To access a range of elements in a list, you must slice it. One option is to use the simple slicing operator, i.e. colon (:) With this operator, you can specify where to start slicing, where to stop slicing, and the step. List slicing produces a new list from an existing one.
Syntax of list slicing
The start argument is required, although the stop and steps parameters are both optional. The start index represents the index from which the list slicing should begin. Its default value is 0, indicating that it starts at index 0.
The stop index represents the final index up to which the list slicing will proceed. Its default value is (length(list)-1) or the index of the list's final element.
List Slicing can be done in three ways
- By providing only the start or stop parameters
- By passing the parameters start and stop
- By passing the parameters start, stop, and steps
Passing the start or stop index only
Passing the start and stop index
Passing the step parameter with colons
Passing start, stop and step parameters
List slicing only displays a subset of the original list. If you want to change the contents of the original list by slicing it or give the sliced list a new name, you must assign the sliced list to a new list variable.
Always remember to give the list a unique name rather than using generic names such as list, tuple, or dictionary, as this will cause complications when calling functions on these data structures.
This comes to the end of the article.These are the various applications of list slicing that can be put to use according to one’s considerations and needs.