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num_str [terminology]

Terminology

Usage

  • Use for a string that represents a number.
  • It distinguishes the representation from an actual int or float.
  • Prefer it over num when the value's type is a string.
# ...
parts = sorted(map(str, nums), key=cmp_to_key(compare))
num_str = "".join(parts)
return "0" if num_str[0] == "0" else num_str

See 179. Largest Number.