Importing a IO table in Brightway2.5 with IOTableBackend.

.write() works but I can’t figure out .write_exchanges(). Documentation says: Technosphere and biosphere data has format (row id, col id, value, flip).

Example:

data = {
    ("bedb", "act1"): {
        "name": "sadkj",
        "unit": "aaa",
        "location": "GLO",
        "type": "product",
        "format": "some_format",
        "key": ("bedb", "act1"),
    },
    ("bedb", "act2"): {
        "name": "askdj",
        "unit": "bbb",
        "location": "GLO",
        "type": "product",
        "format": "some_format",
        "key": ("bedb", "act2"),
    },
}

bedb = bd.backends.iotable.IOTableBackend('bedb')
bedb.write(data) # all good

I have then tried various types of technosphere formats like:

technosphere = [
      (("bedb", "act1"), ("bedb", "act1"),  1.0, False),
      (("bedb", "act1"), ("bedb", "act2"), 0.5, True),
      (("bedb", "act2"), ("bedb", "act2"),  1.0, False),
      (("bedb", "act2"), ("bedb", "act1"), 0.5, True),
      ]

technosphere_ = [
      (("bedb", 0), ("bedb", 0),  1.0, False),
      (("bedb", 1), ("bedb", 0), 0.5, True),
      (("bedb", 1), ("bedb", 1),  1.0, False),
      (("bedb", 1), ("bedb", 0), 0.5, True),
      ]
    
technosphere = [(0, 0, 1.0, False),
                 (0, 1, 0.5, True),
                 (1, 1, 1.0, False), 
                 (1, 0, 0.5, True)]

(Same for biosphere, I tried similar formats. For the reproducible example here: biosphere = [] and dependents = [])

None of them seems to work with bedb.write_exchanges(technosphere, biosphere, dependents) I always get a TypeError: tuple indices must be integers or slices, not str

What is the right format?