ModuleNotFoundError: No module named 'cobra.core.model' in python3

[Biomathsys]

I am new in working python.
I'm working with this code, but unfortunately, I see this error
"
ModuleNotFoundError Traceback (most recent call last)
in ()
10 from six import iteritems
11
---> 12 from cobra.core.model import Model
13
14

ModuleNotFoundError: No module named 'cobra.core.model'
"

Does anyone experience this error?

-- coding: utf-8 --

from future import absolute_import

from sys import maxsize
from warnings import warn

from numpy import array, ndarray
from scipy.sparse import dok_matrix, lil_matrix
from six import iteritems

from cobra.core.model import Model

class ArrayBasedModel(Model):
"""ArrayBasedModel is a class that adds arrays and vectors to
a cobra.Model to make it easier to perform linear algebra operations.

"""

def __init__(self, description=None, deepcopy_model=False,
             matrix_type='scipy.lil_matrix'):
    """
    description: None | String | cobra.Model

    deepcopy_model: Boolean.  If True and description is
    a cobra.Model then make a deepcopy of the Model before
    creating the ArrayBasedModel.

    matrix_type: 'scipy.lil_matrix' or 'scipy.dok_matrix'
        Specifies which type of backend matrix to use for S.

    """
    warn("ArrayBasedModel is deprecated, use "
         "`cobra.util.array.create_stoichiometric_matrix` instead",
         DeprecationWarning)

    if deepcopy_model and isinstance(description, Model):
        description = description.copy()
    Model.__init__(self, description)
    self._S = None
    self.matrix_type = matrix_type
    self.update()

# no setter for S at the moment
@property
def S(self):
    """Stoichiometric matrix of the model

    This will be formatted as either :class:`~scipy.sparse.lil_matrix`
    or :class:`~scipy.sparse.dok_matrix`

    """
    return self._S

[cgoldberg]

I have no idea what the code is that you posted or what you are doing. how is this related to Locust?

[Biomathsys]

I got this code from this website
" http://cobrapy.readthedocs.io/en/latest/_modules/cobra/core/arraybasedmodel.html#ArrayBasedModel "

[cgoldberg]

I'm closing this issue since it is completely unrelated to this project and I have no idea why it was posted here.