parts [terminology]

Terminology¶

Usage¶

• Use for pieces that will later be joined into one string or result.
• It is preferable to res when construction explicitly occurs through concatenation.
• Individual entries may include signs, separators, digits, or encoded runs.

for _ in range(n - 1):
    parts = []
    i = 0
    while i < len(s):
        j = i
        while j < len(s) and s[j] == s[i]:
            j += 1
        parts.append(str(j - i))
        parts.append(s[i])
        i = j
    s = "".join(parts)

See 38. Count and Say.