prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Get rid of netket::Qubits class
  `netket::Qubits` is really just a `CustomHilbert` with `localstates = {0.0, 1.0}`. No need for code duplication.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `netket/hilbert.py`
  Content:
  ```
  1 from ._C_netket.hilbert import *
  2
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/netket/hilbert.py b/netket/hilbert.py
  --- a/netket/hilbert.py
  +++ b/netket/hilbert.py
  @@ -1 +1,22 @@
   from ._C_netket.hilbert import *
  +
  +
  +def Qubit(graph):
  +    """
  +    Constructs a new ``Qubit`` given a graph.
  +
  +    Args:
  +        graph: Graph representation of sites.
  +
  +    Examples:
  +        Simple qubit hilbert space.
  +
  +        ```python
  +        >>> from netket.graph import Hypercube
  +        >>> from netket.hilbert import Qubit
  +        >>> g = Hypercube(length=10,n_dim=2,pbc=True)
  +        >>> hi = Qubit(graph=g)
  +        >>> print(hi.size)
  +        100
  +    """
  +    return CustomHilbert(graph, local_states=[0, 1])
  
verification_info: {"golden_diff": "diff --git a/netket/hilbert.py b/netket/hilbert.py\n--- a/netket/hilbert.py\n+++ b/netket/hilbert.py\n@@ -1 +1,22 @@\n from ._C_netket.hilbert import *\n+\n+\n+def Qubit(graph):\n+    \"\"\"\n+    Constructs a new ``Qubit`` given a graph.\n+\n+    Args:\n+        graph: Graph representation of sites.\n+\n+    Examples:\n+        Simple qubit hilbert space.\n+\n+        ```python\n+        >>> from netket.graph import Hypercube\n+        >>> from netket.hilbert import Qubit\n+        >>> g = Hypercube(length=10,n_dim=2,pbc=True)\n+        >>> hi = Qubit(graph=g)\n+        >>> print(hi.size)\n+        100\n+    \"\"\"\n+    return CustomHilbert(graph, local_states=[0, 1])\n", "issue": "Get rid of netket::Qubits class\n`netket::Qubits` is really just a `CustomHilbert` with `localstates = {0.0, 1.0}`. No need for code duplication.\n", "before_files": [{"content": "from ._C_netket.hilbert import *\n", "path": "netket/hilbert.py"}], "after_files": [{"content": "from ._C_netket.hilbert import *\n\n\ndef Qubit(graph):\n    \"\"\"\n    Constructs a new ``Qubit`` given a graph.\n\n    Args:\n        graph: Graph representation of sites.\n\n    Examples:\n        Simple qubit hilbert space.\n\n        ```python\n        >>> from netket.graph import Hypercube\n        >>> from netket.hilbert import Qubit\n        >>> g = Hypercube(length=10,n_dim=2,pbc=True)\n        >>> hi = Qubit(graph=g)\n        >>> print(hi.size)\n        100\n    \"\"\"\n    return CustomHilbert(graph, local_states=[0, 1])\n", "path": "netket/hilbert.py"}]}