父目录总是可以由..引用，因此您可以将其附加到路径中。
举例来说：

p := "/root/path/"
p = filepath.Clean(filepath.Join(p, ".."))
fmt.Println(p)
// "/root"

如果path本身不是一个目录（或者您确定它不会以路径分隔符结束），那么您可以使用Dir函数来获取包含目录。Dir* 返回path中除了最后一个元素之外的所有元素，通常是path的目录 *：

p := "/root/path"
p = filepath.Dir(p)
fmt.Println(p)
// "/root"

import os
def directory_back_levels(path='', steps=0):
    try:
        # check type
        if not isinstance(steps, int) or not isinstance(path, str):
            return ''
        # performance return path if steps 0
        if steps < 1:
            return path
        # loop towrads steps and use os.path.dirname to get the previous directory
        new_path = path
        for i in range(steps):
            new_path = os.path.dirname(new_path)
        
        return new_path
    except Exception as e:
        print("error in directory_back_levels")
        raise e
Expected = directory_back_levels(path="/root/path", steps=1)
print(Expected)
notExpected = directory_back_levels(path="/root/static/images/new/image.png", steps=4)
print(notExpected)