Replicating Example-1 with indexing syntax: So here, instead of creating a slice object first and then implementing it on the string, we directly use the indexing syntax that performs the same operation. It’s one of those operations and syntax that you appreciate as a developer and subconsciously lookout to apply in your code as it really is a cool operation! Indexing syntax of a slice is a shorthand or a better substitute of slice() as it’s easier to understand and execute. ![]() Whereas ‘start’ index is included in the string being sliced. It stops right before this index when performing slicing. Note: understand that ‘stop’ index means it doesn’t stop ‘at’ this or ‘after’ this index. Hence, now it’s clear that ‘step’ value determines with what value will your iterator (while forming the substring) advance or increment. In the output, we received a substring by advancing to every 2nd element starting from index 1 to 20 In s3: We implement slice() with ‘step’ as well.In the output, we received a substring from index ‘2’ until ‘7’, as we provided ‘start’ as ‘2’ & ‘stop’ as ‘8’. In s2: After that, we used slice() with a three parameter-method but chose not to provide an optional ‘step’ parameter.In the output, we received substring as “Welcom” as the ‘start’ index was automatically set to ‘0’ and ‘stop’ was set as 6. In s1: We first used slice() that takes only one ‘stop’ parameter.In the above example ( check s1, s2 & s3 in the code snippet & output): Implementation with one parameter takes ‘stop’ index as the only and mandatory parameter whereas Implementation with three parameters takes ‘start’ index, ‘stop’ index, and OPTIONAL ‘step’ value as well. Slice() has two implementations, one with a single parameter and another with three parameters. This returned object can now be used to slice string, list, tuple, set, bytes, or range objects.Įxample 1 – Fetching substring using slice object it allows us to skip over elements.īoth slice() implementations return an object of the format slice(start, stop, end). step: It is an optional argument that defines the steps when iterating the list, i.e.stop: is the stopping index of the slicing, ‘until’ which slicing operation has to be performed, i.e, stop index is excluded while generating the substring.It determines from where slicing of the string will ‘begin’. start: is the starting index of the string on which slicing operation has to be performed.Slice(stop) // takes start as 0 & step as 1 To be specific about the parameters, it is (start, stop, step).Īccording to python’s official documentation on string slicing in python: Slice has two different implementations,i.e.slice has two overload methods, each taking two different sets of parameters: ![]() Python provides us with a method slice() that creates a ‘slice’ object that contains a set of ‘start’ & ‘stop’ indices and step values.
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