操作myInput
字符串以获得myOutput
字符串的更快方法是什么?
myInput = "1,3-5,7"
myOutput = "1,3,4,5,7"
答案 0 :(得分:1)
我记得有关SO的问题将[1,3,4,5,7]变成了“1,3-5,7”,但我不记得是哪个
这是相反的问题:
def expand(s):
return ','.join(sum([v if len(v)==1 else map(str, apply(lambda a,b: range(a,b+1), map(int, v))) for v in [p.split('-') for p in s.split(',')]],[]))
print expand("1,3-5,7")
打印:
1,3,4,5,7
答案 1 :(得分:1)
re.sub(
"(\d+)-(\d+)" ,
lambda x : ",".join( map( str , range( int(x.group(1)) , int( x.group(2) ) +1 ) )) ,
"1,3-5,7" )
你可以得到“1,3,4,5,7”
答案 2 :(得分:1)
>>> def expand(s):
... for p in s.split(","):
... r = p.split("-")
... if len(r) == 1:
... yield str(r[0])
... else:
... for i in range(int(r[0]), int(r[1]) + 1):
... yield str(i)
...
>>> ",".join(expand("1,3-5,7"))
'1,3,4,5,7'
>>> ",".join(expand("1-5,8,10,13-19"))
'1,2,3,4,5,8,10,13,14,15,16,17,18,19'
显然,如果输入不符合假设(字母,反向序列等),这将以各种有趣的方式失败,并且它不适用于负数。