Function - Return multiple values

[tester_V]

Greeting!
I have to scan directories and find/process subdirectories.
Number of SubDirs not static.
I thought I could use a function but found I cannot "return" all the SubDirs.
I can print all of them but not return them.
I'm sure it is simple but I could not find a clear answer but I cannot find one.

def func(dir1):
    for ed1 in os.listdir(dir1) :
        echd_p = os.path.join(dir1,ed1)
        if os.path.isdir(echd_p) :
            return (echd_p)

fdp =  func(dir1)
print(type(fdp))   
print(fdp)  

Thank you.