将字符串重复到一定长度的有效方法是什么?例:repeat('abc', 7) -> 'abcabca'

这是我当前的代码:

def repeat(string, length):
    cur, old = 1, string
    while len(string) < length:
        string += old[cur-1]
        cur = (cur+1)%len(old)
    return string

有没有更好的(更python化的)方法来做到这一点?也许使用列表理解?


当前回答

我用这个:

def extend_string(s, l):
    return (s*l)[:l]

其他回答

def repeat_to_length(string_to_expand, length):
   return (string_to_expand * ((length/len(string_to_expand))+1))[:length]

python3:

def repeat_to_length(string_to_expand, length):
    return (string_to_expand * (int(length/len(string_to_expand))+1))[:length]

当前打印(f"{'abc'*7}")生成:

abcabcabcabcabcabcabc

这是非常python的:

newstring = 'abc'*5
print newstring[0:6]
def extended_string (word, length) :

    extra_long_word = word * (length//len(word) + 1)
    required_string = extra_long_word[:length]
    return required_string

print(extended_string("abc", 7))
def rep(s, m):
    a, b = divmod(m, len(s))
    return s * a + s[:b]