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The built-in Python function slice allows the programmer to select portions of the input that they want to slice out. It has two possible syntaxes, slice(stop) or slice(start, stop, step). In the single parameter version, start and step default to none. The following code will print “Str”.

String = 'String slicing'
s1 = slice(3)
print(String[s1])
Which of the following will result in the string “ti”?

(1 point)
Responses

s1 = slice(1, 5, 2)
s1 = slice(1, 5, 2)

s1 = slice(2, 6, 2)
s1 = slice(2, 6, 2)

s1 = slice(1, 5)
s1 = slice(1, 5)

s1 = slice(2,6)

1 answer

To get the string “ti” from the string "String slicing", we need to identify the characters in the string. The string "String slicing" has the following indices:

Index:  0  1  2  3  4  5  6  7  8  9 10 11 12 13
Chars:  S  t  r  i  n  g     s  l  i  c  i  n  g

The characters 't' and 'i' are located at index 1 and index 3 respectively.

With slice(start, stop, step):

  • The start index is inclusive.
  • The stop index is exclusive.
  • The step specifies the increment.

For the string "String slicing", we need to start at index 1 (for 't'), and to get 'i' which is at index 3.

Let's analyze the options:

  1. s1 = slice(1, 5, 2): This will get characters at indices 1, 3 (and (5 being exclusive) thus the resulting characters would be 't' and 'i', which is correct.

  2. s1 = slice(2, 6, 2): This will get characters at indices 2, 4 (and 6 being exclusive) thus resulting in 'r' (index 2) and 'n' (index 4), which is not correct.

  3. s1 = slice(1, 5): This will get characters at indices 1, 2, 3, 4, which will result in 't', 'r', 'i', 'n' which is not correct.

  4. s1 = slice(2,6): This will get indices 2, 3, 4, 5, which results in 'r', 'i', 'n', 'g', which is not correct.

Thus, the correct option that results in the string "ti" is:

s1 = slice(1, 5, 2).