This is the magic behind the shell "up" command. You can do "up 3" to go up 3 levels in the directory hierarchy, or "up foo" to go up to a directory whose name contains "foo".

fup

#!/usr/bin/python3
# Used as part of 'up' to move up complex directory trees:

# With no args, prints '..'
# With a numeric argument, prints '../../' up as many levels as the arg.
# With a string argument, looks for a string in the path, and prints '../'
#  enough times to go up to that directory.
#
# You also need to add to your .bash (I use .bash_aliases):
#
# function up(){
#     cd $(fup $1);
# }
 


import os,sys

args = sys.argv
args.pop(0)
if len(args)==0:
    s = '..'
else:
    arg = args[0]
    if arg.isnumeric():
        s='../'*int(arg)
    else:
        p = os.getcwd()
        lst = p.split('/')
        lst.reverse()
        ct=0
        for i,x in enumerate(lst):
            if arg in x:
                ct = i
                break
        s='../'*ct
        
print(s)