字符串压缩Python实现

def pressandun(str1):
    strlist = []
    templist = []
    for i in str1:
        strlist.append(i)
    for i in range(len(strlist)):
        temp = 1
        if strlist[i] == strlist[i-1] and i != 0:
            continue
        else:
            templist.append(strlist[i])
            for j in range(i+1,len(strlist)):
                if strlist[i] == strlist[j]:
                    temp += 1
                else:
                    break
            templist.append(str(temp))
    for i in templist:
        if i == "1":
            templist.remove("1")
    return "".join(map(str,templist[::]))

例如：a = pressandun("wxuuudfffahhhhhhaddh") 
      print(a)
结果为：wxu3df3ah6ad2h