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@codewars python练习
** dashatize it **
given a number, return a string with dash'-'marks before and after each odd integer, but do not begin or end the string with a dash mark.
ex:
dashatize(274) -> '2-7-4'
dashatize(6815) -> '68-1-5'
def dashatize(num): l2 = [ ] if num == none: return 'none' else: # 将字符串抓为数字存为数组l2 l = list(str(num)) for i in range(len(l)): if l[i] != '-': l[i] = int(l[i]) l2.append(l[i]) # 将分配字符和符号存为数组l3 l3 = [l2[0],] for i in range(1, len(l2)): if l2[i] % 2 == 0 and l2[i-1] % 2 != 0: l3.append('-') l3.append(l2[i]) elif l2[i] % 2 != 0: l3.append('-') l3.append(l2[i]) else: l3.append(l2[i]) c = map(str,l3) return "".join(c)
import re def dashatize(num): try: return ''.join(['-'+i+'-' if int(i)%2 else i for i in str(abs(num))]).replace('--','-').strip('-') except: return 'none'
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