Problem with 1D Korteweg-de Vries / Burgers equation.

[rumayel pallock]

Hi, When I am trying to run the script of 1D Korteweg-de Vries / Burgers equation, I get the following error message,

timestepper = d3.SBDF2
AttributeError: module 'dedalus.public' has no attribute 'SBDF2'

I am new to this. If anybody can help how to solve this problem, it would be really appreciated.

Best,

Rumayel

[Daniel Lecoanet]

Hi,

Sounds like you have not installed the latest d3 version of Dedalus. When you run “pip list”, it should tell you which version of Dedalus you are running. How did you install Dedalus?

Daniel

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[rumayel pallock]

Thanks for the reply. I have installed Dedalus using conda and from "pip list" the version shows 2.2006. I will update from the installation website.

Thanks again,

Rumayel

[Sarthak Chandra]

I seem to still be facing this issue. If I run pip list I seem to have "dedalus 3.0.0a0". However, I still seem to face the " module 'dedalus.public' has no attribute 'SBDF2' " error. Using d3.timesteppers.SBDF2 seems to work though. But then "d3.Coordinate('x') " fails.

For context, I am trying to get dedalus to work on google colab. Here's the script I'm using to set up the installation, maybe something is getting messed up there:

## Check Dedalus isn't already installed

## Installation takes about 1-2 mins

try:

  import dedalus.public as de

  print("Dedalus already installed")

except:

  print("Dedalus not installed yet. Let's do it.")

  # Step 1: Install FFTW

  !apt-get install libfftw3-dev

  !apt-get install libfftw3-mpi-dev

  # Step 2: Set paths for Dedalus installation

  import os

  os.environ['MPI_INCLUDE_PATH'] = "/usr/lib/x86_64-linux-gnu/openmpi/include"

  os.environ['MPI_LIBRARY_PATH'] = "/usr/lib/x86_64-linux-gnu"

  os.environ['FFTW_INCLUDE_PATH'] = "/usr/include"

  os.environ['FFTW_LIBRARY_PATH'] = "/usr/lib/x86_64-linux-gnu"

  # Step 3: Install Dedalus using pip

  !pip3 install dedalus

  # Step 4: Check Dedalus is importable

  print()

  print()

  try:

    import dedalus.public as de

    print("Dedalus successfully installed :)")

  except:

    print("Error installing Dedalus :(")

    raise

! CC=mpicc pip3 install --no-cache http://github.com/dedalusproject/dedalus/zipball/master/

! CC=mpicc pip3 install --upgrade --force-reinstall --no-deps --no-cache http://github.com/dedalusproject/dedalus/zipball/master/