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public python v1 · immutabledef find(str, ch): index = 0 while index < len(str): if str[index] == ch: return index index = index + 1 return -1find("bada", "a")def find(str, ch): index = 0 while index < len(str): if str[index] == ch: return index index = index + 1 return -1find("bada", "a")