Error when Changing environment: Ninja is required to load C++ extensions

[ChifengWoo]

When I try to switch other people's conda environments， I have got the following error trace:

raise RuntimeError("Ninja is required to load C++ extensions")
RuntimeError: Ninja is required to load C++ extensions

I must execute export PATH=/gxr/user/anaconda3/envs/py38/bin:$PATH to run successfully.

[mxuran]

I get this error when executing the server code on my local PyCharm, and I haven't solved it yet.

[KiddoZhu]

This is a general error of conda environments, not related to torchdrug.

According to my experience, sometimes conda fail to setup the PATH variable correctly when you activate an environment from an existing environment. My suggestion is to first deactivate your existing environment to base, and then activate the new environment.

[Chris-Tang6]

I can run the tutorial code perfectly in jupyter notebook, however when I changed it to plain .py and run in Pycharm. It also got this error:

Traceback (most recent call last):
  File "/homeb/tangwuguo/projects/CBC2023_ProteinSuperfamilies/code/test_tutorial.py", line 32, in <module>
    print("Shape of function labels for a protein: ", dataset[0]["targets"].shape)
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torchdrug/data/dataset.py", line 189, in __getitem__
    return self.get_item(index)
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torchdrug/datasets/enzyme_commission.py", line 134, in get_item
    item["targets"] = utils.sparse_coo_tensor(indices, values, (len(self.tasks),)).to_dense()
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torchdrug/utils/torch.py", line 182, in sparse_coo_tensor
    return torch_ext.sparse_coo_tensor_unsafe(indices, values, size)
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torchdrug/utils/torch.py", line 27, in __getattr__
    return getattr(self.module, key)
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torchdrug/utils/decorator.py", line 102, in __get__
    result = self.func(obj)
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torchdrug/utils/torch.py", line 31, in module
    return cpp_extension.load(self.name, self.sources, self.extra_cflags, self.extra_cuda_cflags,
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torch/utils/cpp_extension.py", line 1079, in load
    return _jit_compile(
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torch/utils/cpp_extension.py", line 1292, in _jit_compile
    _write_ninja_file_and_build_library(
  File "/homeb/tangwuguo/miniconda3/envs/cbc23/lib/python3.8/site-packages/torch/utils/cpp_extension.py", line 1373, in _write_ninja_file_and_build_library
    verify_ninja_availability()
  File "/homeb/tangwuguo/miniconda3/envs/cbc/lib/python3.8/site-packages/torch/utils/cpp_extension.py", line 1429, in verify_ninja_availability
    raise RuntimeError("Ninja is required to load C++ extensions")
RuntimeError: Ninja is required to load C++ extensions

I tried to use the shell to run the .py file, It runs well. Too weird.