create a dictionary based off of string variable names. based on rust struct shorthand init.

ndict.py

def ndict(*args):
    """Return a dictionary with the given keys and their values from globals."""
    g = globals()
    result = {}
    for arg in args:
        if arg in g:
            result[arg] = g[arg]
        else:
            raise KeyError(f"Key '{arg}' not found in globals")
    return result