Unique Characters Function

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Your question is Unique Characters Function. Start with the requirements on the right.

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Problem

Cvent event administrators may define a compact event code for internal workflows. Write a function that returns whether every character in an event code appears exactly once.

Formal Specification

Implement has_all_unique_characters(code).

Input: code, a Python string.
Output: Return True if no character occurs more than once. Otherwise, return False.
Character comparisons are case-sensitive. For example, A and a are different characters.
Spaces and punctuation are characters and must also be unique if present.

Constraints

0 <= len(code) <= 100,000
code may contain any Python string characters, including Unicode
Character comparisons are case-sensitive
Spaces and punctuation count as characters

Function Signature

def has_all_unique_characters(code):

Your solutionPython 3

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