Normalize Internal Whitespace

Medium ⏱ 12 min 46% acceptance ★★★★★ 4.7

Write normalize_whitespace(s) that collapses every run of internal whitespace (spaces, tabs) down to a single space, and also trims leading/trailing whitespace.

Examples

Example 1

Input

s = '  Hello   World  '

Output

'Hello World'

Explanation

Leading/trailing spaces trimmed, internal double-space collapsed to one.

Example 2

Input

s = 'This   is    a   test'

Output

'This is a test'

Explanation

Every internal whitespace run becomes exactly one space.

Constraints

0 <= len(s) <= 10^4

Topics

StringsWhitespace Handling

Companies

MicrosoftAdobe

Hints

Hint 1

`s.split()` with no arguments already tokenizes on any whitespace run, discarding empties.

Hint 2

Rejoin the tokens with a single space.

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