Python Pandas实现LEFT OUTER APPLY、CROSS JOIN和CROSS APPLY的功能

以下是用Python Pandas实现SQL Server中LEFT OUTER APPLY、CROSS JOIN和CROSS APPLY功能的三个高性能函数，包含异常处理和性能优化：

import pandas as pd
from functools import wraps
import warnings

def handle_exceptions(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        try:
            return func(*args, **kwargs)
        except pd.errors.MergeError as e:
            warnings.warn(f"Merge conflict detected: {
     str(e)}")
            return pd.DataFrame()
        except TypeError as e:
            raise TypeError(f"Invalid argument type: {
     str(e)}") from e
        except ValueError as e:
            raise ValueError(f"Data validation failed: {
     str(e)}") from e
        except Exception as e:
            raise RuntimeError(f"Unexpected error: