问Python模拟PHP的natsort函数(使用“自然顺序”算法对列表进行排序)

EN

l = ['image1.jpg', 'image15.jpg', 'image12.jpg', 'image3.jpg']
l.sort()

['image1.jpg', 'image12.jpg', 'image15.jpg', 'image3.jpg']

['image1.jpg', 'image3.jpg', 'image12.jpg', 'image15.jpg']

def try_int(s):
    "Convert to integer if possible."
    try: return int(s)
    except: return s

def natsort_key(s):
    "Used internally to get a tuple by which s is sorted."
    import re
    return map(try_int, re.findall(r'(\d+|\D+)', s))

def natcmp(a, b):
    "Natural string comparison, case sensitive."
    return cmp(natsort_key(a), natsort_key(b))

def natcasecmp(a, b):
    "Natural string comparison, ignores case."
    return natcmp(a.lower(), b.lower())

l.sort(natcasecmp);