jupyter notebook FileNotFoundError - 在错误的Anaconda目录中寻找

我在打开一个Jupyter笔记本文件时遇到了问题。当寻找Python时，Jupyter笔记本给出了一个FileNotFoundError错误：\n

Traceback (most recent call last):
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/notebook/base/handlers.py", line 503, in wrapper
        result = yield gen.maybe_future(method(self, *args, **kwargs))
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1015, in run
        value = future.result()
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/concurrent.py", line 237, in result
        raise_exc_info(self._exc_info)
      File "", line 3, in raise_exc_info
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1021, in run
        yielded = self.gen.throw(*exc_info)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/notebook/services/sessions/handlers.py", line 75, in post
        type=mtype))
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1015, in run
        value = future.result()
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/concurrent.py", line 237, in result
        raise_exc_info(self._exc_info)
      File "", line 3, in raise_exc_info
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1021, in run
        yielded = self.gen.throw(*exc_info)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/notebook/services/sessions/sessionmanager.py", line 79, in create_session
        kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1015, in run
        value = future.result()
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/concurrent.py", line 237, in result
        raise_exc_info(self._exc_info)
      File "", line 3, in raise_exc_info
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1021, in run
        yielded = self.gen.throw(*exc_info)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/notebook/services/sessions/sessionmanager.py", line 92, in start_kernel_for_session
        self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1015, in run
        value = future.result()
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/concurrent.py", line 237, in result
        raise_exc_info(self._exc_info)
      File "", line 3, in raise_exc_info
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/tornado/gen.py", line 1021, in run
        yielded = self.gen.throw(*exc_info)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/notebook/services/kernels/kernelmanager.py", line 87, in start_kernel
        super(MappingKernelManager, self).start_kernel(**kwargs)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/jupyter_client/multikernelmanager.py", line 110, in start_kernel
        km.start_kernel(**kwargs)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/jupyter_client/manager.py", line 257, in start_kernel
        **kw)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/jupyter_client/manager.py", line 203, in _launch_kernel
        return launch_kernel(kernel_cmd, **kw)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/site-packages/jupyter_client/launcher.py", line 128, in launch_kernel
        proc = Popen(cmd, **kwargs)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/subprocess.py", line 707, in __init__
        restore_signals, start_new_session)
      File "/Users/myusername/anaconda/envs/dlnd/lib/python3.6/subprocess.py", line 1326, in _execute_child
        raise child_exception_type(errno_num, err_msg)
    FileNotFoundError: [Errno 2] No such file or directory: '/Users/myusername/anaconda3/envs/py3/bin/python'

\n我正在参加一个在线课程。我开始创建一个conda环境，如下所示：\n

conda create --name dlnd python=3
source activate dlnd
conda install numpy matplotlib pandas jupyter notebook

\n然后我尝试打开课程中提供的文件：\n

jupyter notebook dlnd-your-first-neural-network.ipynb

\n这时候就出现了错误。\n我怀疑问题是我没有/Users/myusername/anaconda3/目录（因此出现了FileNotFoundError）。我所有的anaconda东西都安装在/Users/myusername/anaconda/，我已经使用jupyter笔记本几周了，在各种环境中运行各种.ipynb文件，没有出现什么大问题。\n我不确定为什么jupyter笔记本在这个特定的情况下在anaconda3/中查找。我已经尝试重新安装，但是一切都安装在/Users/myusername/anaconda/中。\n有经验的人知道我缺少什么吗？\n使用Macbook pro 10.11。