The Slice ()() Function in Python

This updated guide examines The Slice ()() Function in Python and organizes the essential facts, background, and practical takeaways in clear American English.

The slice () function in Python returns a slice object. This object helps you determine how to cut an existing string (be it string, bytes, tuple, list, range) or objects that support string protocols (such as _getitem __ (), __len __ ()).

The syntax of the slice () function in Python:

slice(stop) slice(start, stop, step)

The parameters of the slice () function

The slice () function can have as many as 3 parameters:

• start: An integer specifying the position to start cutting the object. The default is 0.
• stop: An integer specifying the position where the object ends.
• step: An integer that specifies the increment between cuts. The default value is 1.

If only one parameter is passed into the slice (), then start and step have no value.

The value returned from slice ()

The slice () function returns a slice object used to slice a string according to the corresponding indexes passed in the function.

Example 1: Create a slice object to cut

# ch?a các ch? s? (0, 1, 2) print(slice(3)) # ch?a các ch? s? (1, 3) print(slice(1, 5, 2))

When you run the program, the output will be:

slice(None, 3, None) slice(1, 5, 2)

Example 2: Receiving substring from a given string using slice object

pyString = 'Python' # ch?a các ch? s? (0, 1, 2) # vd P, y và t sObject = slice(3) print(pyString[sObject]) # ch?a các ch? s? (1, 3) # vd y và h sObject = slice(1, 5, 2) print(pyString[sObject])

Return value:

Pyt yh

Example 3: Get substring from a given string using negative index

pyString = 'Python' # ch?a các ch? s? (-1, -2, -3) # vd n, o và h sObject = slice(-1, -4, -1) print(pyString[sObject])

The output will be:

noh

Example 4: Slicing lists and tuples

pyList = ['P', 'y', 't', 'h', 'o', 'n'] pyTuple = ('P', 'y', 't', 'h', 'o', 'n') # ch?a các ch? s? (0, 1, 2) # vd P, y và t sObject = slice(3) # c?t list print(pyList[sObject]) # ch?a các ch? s? (1, 3) # vd y và h sObject = slice(1, 5, 2) # c?t tuple print(pyTuple[sObject])

Results returned:

['P', 'y', 't'] ('y', 'h')

See also: Python built-in functions