Where are saved files in Google Colab located?

Question

I'm trying to access a VTK file where the solution to the heat equation is saved, but I've no idea where it's saved in Colab.

from fenics import *
import time
T = 2.0            # final time
num_steps = 50     # number of time steps
dt = T / num_steps # time step size
# Create mesh and define function space
nx = ny = 30
mesh = RectangleMesh(Point(-2, -2), Point(2, 2), nx, ny)
V = FunctionSpace(mesh, 'P', 1)
# Define boundary condition
def boundary(x, on_boundary):
    return on_boundary
bc = DirichletBC(V, Constant(0), boundary)
# Define initial value
u_0 = Expression('exp(-a*pow(x[0], 2) - a*pow(x[1], 2))',
                 degree=2, a=5)
u_n = interpolate(u_0, V)
# Define variational problem
u = TrialFunction(V)
v = TestFunction(V)
f = Constant(0)
F = u*v*dx + dt*dot(grad(u), grad(v))*dx - (u_n + dt*f)*v*dx
a, L = lhs(F), rhs(F)
# Create VTK file for saving solution
vtkfile = File('heat_gaussian/solution.pvd')
# Time-stepping
u = Function(V)
t=0
for n in range(num_steps):
    # Update current time
    t += dt
    # Compute solution
    solve(a == L, u, bc)
    # Save to file and plot solution
    vtkfile << (u, t)
    plot(u)
    # Update previous solution
    u_n.assign(u)
# Hold plot
#interactive()

I've tried;

from google.colab import files
plt.savefig("vtkfile")
files.download("vtkfile")

And

from google.colab import files files.upload()
from google.colab import drive drive.mount('vtkfile')

But still getting errors. Where are files created in the notebook stored?

Solution 1

On the left side of colab interface, there is a "Files" tab. You can find all the files you saved there.

Solution 2

Complementing @jules-cui answer, on the left side of the Colab interface you will see a few icons. Click on the folder icon, which opens all the files in your runtime. You can click on any of the files' extended menu to the right, and click Download.

Solution 3

If you mounted GDrive then files should be stored in the folder named Colab Notebooks

You could also check your current folder with one of the commands below.

%cd

or

!pwd 

Comments

[Mo Houshmand]

Both %cd and !pwd gives /root as output. I've found the files but how do I download them?

[Dkoded]

exactly what my eyes failed to catch :D Thanks!