'''string切片'''def string_split(stringone,split):    m = []    if  type(split)!=str:        return  False    if split not in stringone :        m.append(stringone)        return m    if type(stringone)!=str:        return False    if not  split:        m.append(stringone)        return m    else:        h=0        l=0        for i in range(len(stringone)):            if stringone[i]==split:                if i==0 and h==0:                    n = (stringone[0])                elif h>0:                    n=stringone[l:i]                else:                    n=stringone[0:i]                if i==len(stringone)-1:                    c = stringone[len(stringone)-1]                elif h>0 :                    c=stringone[-1]                else:                    c=''                if len(n)!=0 :                    m.append(n)                if len(c)!=0:                        m.append(c)                i += 1                h += 1                l= i            else:                i+=1        return mprint(string_split('12,22,11',split='1,'))