relative_path.py

"""
Finds a file in the same directory as the Grasshopper file.
    Inputs: Name: File name and extiestion to grab.
    Outputs: Path: Full file path.
"""

# Name component
ghenv.Component.Name = "Relative File Path"
ghenv.Component.NickName = "RelFilePath"

# Import libraries
import os
import Grasshopper as gh

# Get GH file path
gh_path = ghdoc.Path
dir = os.path.dirname(os.path.realpath(gh_path))

# Join GH file path and file name
path = os.path.join(dir, Name)

# Test if that file exists
if os.path.isfile(path) == True:
    Path = path # Declare output param
else:
    msg = "File does not exist."
    ghenv.Component.AddRuntimeMessage(gh.Kernel.GH_RuntimeMessageLevel.Warning, msg)