Import Error : import dgl

Used:
!conda install -c dglteam dgl-cuda10.2 to install dgl. Unable to import dgl.
What can be the problem?

Could you post full error messages? Also did you meet problem when installing ?

In the installation:
!conda install -c dglteam dgl-cuda10.2

Collecting package metadata (current_repodata.json): done
Solving environment: done

## Package Plan ##

  • environment location: /usr/local*

  • added / updated specs:*

    • dgl-cuda10.2*

The following packages will be downloaded:

  • package | build*
  • ---------------------------|-----------------*
  • ca-certificates-2021.10.8 | ha878542_0 139 KB conda-forge*
  • certifi-2021.10.8 | py37h89c1867_1 145 KB conda-forge*
  • conda-4.11.0 | py37h89c1867_0 16.9 MB conda-forge*
  • decorator-4.4.2 | py_0 11 KB conda-forge*
  • dgl-cuda10.2-0.7.2 | py37_0 90.6 MB dglteam*
  • libblas-3.9.0 |11_linux64_openblas 12 KB conda-forge*
  • libcblas-3.9.0 |11_linux64_openblas 11 KB conda-forge*
  • libgfortran-ng-11.2.0 | h69a702a_11 19 KB conda-forge*
  • libgfortran5-11.2.0 | h5c6108e_11 1.7 MB conda-forge*
  • liblapack-3.9.0 |11_linux64_openblas 11 KB conda-forge*
  • libopenblas-0.3.17 |pthreads_h8fe5266_1 9.2 MB conda-forge*
  • networkx-2.5.1 | pyhd8ed1ab_0 1.2 MB conda-forge*
  • numpy-1.20.3 | py37h038b26d_1 5.7 MB conda-forge*
  • python_abi-3.7 | 2_cp37m 4 KB conda-forge*
  • scipy-1.5.3 | py37h14a347d_0 19.1 MB conda-forge*
  • ------------------------------------------------------------*
  •                                       Total:       144.8 MB*
    

The following NEW packages will be INSTALLED:

  • decorator conda-forge/noarch::decorator-4.4.2-py_0*
  • dgl-cuda10.2 dglteam/linux-64::dgl-cuda10.2-0.7.2-py37_0*
  • libblas conda-forge/linux-64::libblas-3.9.0-11_linux64_openblas*
  • libcblas conda-forge/linux-64::libcblas-3.9.0-11_linux64_openblas*
  • libgfortran-ng conda-forge/linux-64::libgfortran-ng-11.2.0-h69a702a_11*
  • libgfortran5 conda-forge/linux-64::libgfortran5-11.2.0-h5c6108e_11*
  • liblapack conda-forge/linux-64::liblapack-3.9.0-11_linux64_openblas*
  • libopenblas conda-forge/linux-64::libopenblas-0.3.17-pthreads_h8fe5266_1*
  • networkx conda-forge/noarch::networkx-2.5.1-pyhd8ed1ab_0*
  • numpy conda-forge/linux-64::numpy-1.20.3-py37h038b26d_1*
  • scipy conda-forge/linux-64::scipy-1.5.3-py37h14a347d_0*

The following packages will be UPDATED:

  • ca-certificates 2020.12.5-ha878542_0 → 2021.10.8-ha878542_0*
  • certifi 2020.12.5-py37h89c1867_1 → 2021.10.8-py37h89c1867_1*
  • conda 4.9.2-py37h89c1867_0 → 4.11.0-py37h89c1867_0*
  • python_abi 3.7-1_cp37m → 3.7-2_cp37m*

Downloading and Extracting Packages
liblapack-3.9.0 | 11 KB | : 100% 1.0/1 [00:00<00:00, 10.14it/s]
conda-4.11.0 | 16.9 MB | : 100% 1.0/1 [00:04<00:00, 4.01s/it]
*libopenblas-0.3.17 | 9.2 MB | : 100% 1.0/1 [00:01<00:00, 1.77s/it] *
libgfortran5-11.2.0 | 1.7 MB | : 100% 1.0/1 [00:00<00:00, 2.75it/s]
libblas-3.9.0 | 12 KB | : 100% 1.0/1 [00:00<00:00, 19.67it/s]
ca-certificates-2021 | 139 KB | : 100% 1.0/1 [00:00<00:00, 16.19it/s]
libgfortran-ng-11.2. | 19 KB | : 100% 1.0/1 [00:00<00:00, 21.25it/s]
*scipy-1.5.3 | 19.1 MB | : 100% 1.0/1 [00:03<00:00, 3.53s/it] *
libcblas-3.9.0 | 11 KB | : 100% 1.0/1 [00:00<00:00, 22.70it/s]
python_abi-3.7 | 4 KB | : 100% 1.0/1 [00:00<00:00, 22.69it/s]
dgl-cuda10.2-0.7.2 | 90.6 MB | : 100% 1.0/1 [00:23<00:00, 23.00s/it]
networkx-2.5.1 | 1.2 MB | : 100% 1.0/1 [00:00<00:00, 2.94it/s]
numpy-1.20.3 | 5.7 MB | : 100% 1.0/1 [00:01<00:00, 1.28s/it]
decorator-4.4.2 | 11 KB | : 100% 1.0/1 [00:00<00:00, 23.32it/s]
certifi-2021.10.8 | 145 KB | : 100% 1.0/1 [00:00<00:00, 13.70it/s]
Preparing transaction: done
Verifying transaction: done
Executing transaction: done

Once I import the dgl :

Are you using colab? How did you install conda? It seems your conda is not properly configured