square_in_polygon.py

# pip install shapely
from shapely.geometry.polygon import Polygon

def check(polygon, square):
	polygon = Polygon(polygon)
	square = Polygon(square)
	return polygon.contains(square)

print( check( [(0, 0), (0, 1), (1, 1), (1, 0)], [(0.1, 0.9), (0.1, 0.9), (0.9, 0.9), (0.9, 0.1)] ) )
# > True
print( check( [(0, 0), (0, 1), (1, 1), (1, 0)], [(0.1, 1.1), (0.1, 0.9), (0.9, 0.9), (0.9, 0.1)] ) )
# > False