grid.py
def draw_face(arr, face, dim, shade):
    """
    Draws face on 2D array given the corresponding vertices and shade.
    For 3D drawings, only projected vertices must be passed.
    """
    # use permutation of coefficients to speed up computations.

    Draws face on 2D array given the corresponding vertices and shade.
    For 3D drawings, only projected vertices must be passed.
    
Draws face on 2D array given the corresponding vertices and shade.
For 3D drawings, only projected vertices must be passed.
Draws face on 2D array given the corresponding vertices and shade . For 3D drawings only projected vertices must be passed .
def draw_face(arr, face, dim, shade):
def draw_face ( arr , face , dim , shade ) :
Draws face on 2D array given the corresponding vertices and shade.
Draws face on 2D array given the corresponding vertices and shade .
"""
    Draws face on 2D array given the corresponding vertices and shade.
    For 3D drawings, only projected vertices must be passed.
    """ # use permutation of coefficients to speed up computations.
arr
face
dim
shade