Google colab some library is not showing

[ramaPatel01]

import torch
from pina.problem import TimeDependentProblem, SpatialProblem
from pina.operators import grad
from pina import Condition
from pina.span import Span
from pina import LabelTensor
import pandas as pd
from scipy.io import savemat
import os
import random
import numpy as np

---

ModuleNotFoundError Traceback (most recent call last)
in <cell line: 5>()
3 from pina.operators import grad
4 from pina import Condition
----> 5 from pina.span import Span
6 from pina import LabelTensor
7 import pandas as pd

ModuleNotFoundError: No module named 'pina.span'

similar error with Solver PINN "ImportError Traceback (most recent call last)
in <cell line: 4>()
2 import torch
3 from torch.nn import Softplus
----> 4 from pina import PINN, Plotter, LabelTensor
5 from pina.model import FeedForward
6 from problems.burgers_with_data import Burgers1D

ImportError: cannot import name 'PINN' from 'pina' (/usr/local/lib/python3.10/dist-packages/pina/init.py)"

[dario-coscia]

Hi @ramaPatel01 ! Can you provide the way you installed PINA on Colab?

I think you are using a very old version of PINA, can you also provided the version number (just run
python -c "import pina; print(pina.__version__)" from bash).