Finds unique characters in a string

unique_string.py

# Here's the original string.
_string = "abcdde"

# Cast the string into a set of characters.
# Remember sets have all unique elements.
char_set = set(_string)

# Create a string from the character set.
unique_string = "".join(char_set)

# Count the number of times each character appears in the original string.
for char in char_set:
  entries = _string.count(char)
  print(f"{char} has {entries} entries.")