Get Directory of Extension

Revit API
8

This is from pythons documentation of the path module.
Basically the “…/” that is added signals the normpath function to go up 4 steps in the path.

os.path.normpath(path )
Normalize a pathname by collapsing redundant separators and up-level references so that A//B, A/B/, A/./B and A/foo/../B all become A/B. This string manipulation may change the meaning of a path that contains symbolic links. On Windows, it converts forward slashes to backward slashes. To normalize case, use normcase().>

Also os.path.join is similar to just adding the strings with +, but it leaves the joining to the path module which supports multiple platforms.

Edit:
I was looking through the source code, and saw this. This is how pyrevit gets it’s root directory which is another reference. It uses os.path.dirname instead which may be more intuitive.

# -----------------------------------------------------------------------------
# config environment paths
# -----------------------------------------------------------------------------
# main pyrevit repo folder
try:
    # 3 steps back for <home>/Lib/pyrevit
    HOME_DIR = op.dirname(op.dirname(op.dirname(__file__)))
except NameError:
    raise Exception('Critical Error. Can not find home directory.')

# BIN directory
BIN_DIR = op.join(HOME_DIR, 'bin')

# main pyrevit lib folders
MAIN_LIB_DIR = op.join(HOME_DIR, 'pyrevitlib')
MISC_LIB_DIR = op.join(HOME_DIR, 'site-packages')

# path to pyrevit module
MODULE_DIR = op.join(MAIN_LIB_DIR, 'pyrevit')

# loader directory
LOADER_DIR = op.join(MODULE_DIR, 'loader')

# runtime directory
RUNTIME_DIR = op.join(MODULE_DIR, 'runtime')

# addin directory
ADDIN_DIR = op.join(LOADER_DIR, 'addin')
2 Likes