a `SyntaxError` is raised in the file `preprocess.py`

[Vigilence]

Description:

When running the server script, a SyntaxError is raised in the file preprocess.py due to a duplicate argument name in the function definition of preprocess_to_tensors inside the PreprocessMixin class.

Error Message:

SyntaxError: duplicate argument 'skip_existing' in function definition
File "acestep/training/dataset_builder_modules/preprocess.py", line 57
skip_existing: bool = False,
^^^^^^^^^^^^^^^^^^^

Root Cause:

The function preprocess_to_tensors defines the skip_existing parameter twice in its argument list:

def preprocess_to_tensors(
    self,
    dit_handler,
    output_dir: str,
    max_duration: float = 240.0,
    skip_existing: bool = False,   # First occurrence
    preprocess_mode: str = "lora",
    progress_callback=None,
    skip_existing: bool = False,   # Duplicate occurrence causing the syntax error
) -> Tuple[List[str], str]:

Python syntax does not allow duplicate parameter names in function definitions, leading to this error.

Steps to Reproduce:

1. Clone or download the repository.
2. Activate the virtual environment.
3. Run the server script, e.g. ./3、run_server.ps1.
4. Observe the traceback ending with the above SyntaxError.

Expected Behavior:

The script should load and run without syntax errors.

Actual Behavior:

Script fails with SyntaxError caused by duplicate argument skip_existing.

Suggested Fix:

Remove the duplicate skip_existing argument from the function signature. The corrected function header should be:

def preprocess_to_tensors(
    self,
    dit_handler,
    output_dir: str,
    max_duration: float = 240.0,
    skip_existing: bool = False,
    preprocess_mode: str = "lora",
    progress_callback=None,
) -> Tuple[List[str], str]:


Please address this issue to allow successful execution of the preprocessing function and server startup.

Thank you.