This is a simple Selective Search Implementation for Python
$ pip install selectivesearch
It is super-simple.
import skimage.data
import selectivesearch
img = skimage.data.astronaut()
img_lbl, regions = selectivesearch.selective_search(img, scale=500, sigma=0.9, min_size=10)
regions[:10]
=>
[{'labels': [0.0], 'rect': (0, 0, 15, 24), 'size': 260},
{'labels': [1.0], 'rect': (13, 0, 1, 12), 'size': 23},
{'labels': [2.0], 'rect': (0, 15, 15, 11), 'size': 30},
{'labels': [3.0], 'rect': (15, 14, 0, 0), 'size': 1},
{'labels': [4.0], 'rect': (0, 0, 61, 153), 'size': 4927},
{'labels': [5.0], 'rect': (0, 12, 61, 142), 'size': 177},
{'labels': [6.0], 'rect': (7, 54, 6, 17), 'size': 8},
{'labels': [7.0], 'rect': (28, 50, 18, 32), 'size': 22},
{'labels': [8.0], 'rect': (2, 99, 7, 24), 'size': 24},
{'labels': [9.0], 'rect': (14, 118, 79, 117), 'size': 4008}]