Brightway tutorial not working on fresh install

[konstantinstadler]

Hi,

We are trying to follow the tutorial at https://github.com/brightway-lca/brightway2/blob/master/notebooks/Activities%20and%20exchanges.ipynb

after installing brighway via (which installs numpy 1.24.1)

mamba create -n bw2 -c conda-forge -c cmutel brightway2 jupyterlab and running

from brightway2 import *

we get

In [3]: from brightway2 import * /home/konstans/.conda/envs/bw2/lib/python3.11/site-packages/bw2data/data_store.py:172: FutureWarning: In the future np.bool will be defined as the corresponding NumPy scalar. (This may have returned Python scalars in past versi ons. (numpy_string('negative'), np.bool),

AttributeError Traceback (most recent call last) Cell In[3], line 1 ----> 1 from brightway2 import *

File ~/.conda/envs/bw2/lib/python3.11/site-packages/brightway2/init.py:2 1 # -- coding: utf-8 - ----> 2 from bw2data import 3 from bw2calc import 4 from bw2io import *

File ~/.conda/envs/bw2/lib/python3.11/site-packages/bw2data/init.py:64 61 config.p = preferences 63 from .serialization import JsonWrapper ---> 64 from .database import DatabaseChooser as Database, get_activity 65 from .data_store import DataStore, ProcessedDataStore 66 from .method import Method

File ~/.conda/envs/bw2/lib/python3.11/site-packages/bw2data/database.py:6 3 from eight import * 5 from . import databases, config ----> 6 from .backends.single_file import SingleFileDatabase 7 from .backends.json import JSONDatabase 8 from .backends.peewee import SQLiteBackend

File ~/.conda/envs/bw2/lib/python3.11/site-packages/bw2data/backends/init.py:5 2 from future import print_function, unicode_literals 3 from eight import * ----> 5 from .base import LCIBackend 6 from .peewee import SQLiteBackend 7 from .json import JSONDatabase

File ~/.conda/envs/bw2/lib/python3.11/site-packages/bw2data/backends/base.py:12 3 from eight import * 5 from .. import ( 6 config, 7 databases, (...) 10 projects, 11 ) ---> 12 from ..data_store import ProcessedDataStore 13 from ..errors import UntypedExchange, InvalidExchange, UnknownObject 14 from ..query import Query

File ~/.conda/envs/bw2/lib/python3.11/site-packages/bw2data/data_store.py:151 147 self.validator(data) 148 return True --> 151 class ProcessedDataStore(DataStore): 152 """ 153 Brightway2 data stores that can be processed to NumPy arrays. In addition to metadata and (optionally) validator, subclasses should define: 154 (...) 160 161 """ 162 dtype_fields = None

File ~/.conda/envs/bw2/lib/python3.11/site-packages/bw2data/data_store.py:172, in ProcessedDataStore() 162 dtype_fields = None 163 # Numpy columns names can't be unicode 164 base_uncertainty_fields = [ 165 (numpy_string('uncertainty_type'), np.uint8), 166 (numpy_string('amount'), np.float32), 167 (numpy_string('loc'), np.float32), 168 (numpy_string('scale'), np.float32), 169 (numpy_string('shape'), np.float32), 170 (numpy_string('minimum'), np.float32), 171 (numpy_string('maximum'), np.float32), --> 172 (numpy_string('negative'), np.bool), 173 ] 175 @property 176 def dtype(self): 177 """Returns both the generic base_uncertainty_fields plus class-specific dtype_fields. dtype determines the columns of the :ref:processed array <processing-data>."""

File ~/.conda/envs/bw2/lib/python3.11/site-packages/numpy/init.py:284, in getattr(attr) 281 from .testing import Tester 282 return Tester --> 284 raise AttributeError("module {!r} has no attribute " 285 "{!r}".format(name, attr))

AttributeError: module 'numpy' has no attribute 'bool'

[konstantinstadler]

The issue is reproducible across machines (and OS: linux and windows) here, it seems that older versions of brighway don't have that problem.

[BenPortner]

Hi @konstantinstadler,

Thanks for using brightway! The issue and a fix have been described here. Simply downgrade numpy: conda install numpy=1.23.5.

• Ben

[konstantinstadler]

Thanks a lot! We will do that. Sorry for not finding the previous one, just checked in here