bcb-0018

1.000

5/5 tests· lib-knowledge

Proposed solution

```python
import subprocess
import csv
import glob
import random
import os

def task_func(file):
    """
    Divide a CSV file into several smaller files and shuffle the lines in each file.
    
    This function takes a CSV file path as input, divides it into smaller files using 
    the shell 'split' command, and shuffles the rows in each of the resulting files.
    The output files are named with a 'split_' prefix.

    Parameters:
    - file (str): The path to the CSV file.

    Returns:
    - list: The paths to the split files. Returns an empty list if the file does not exist, is not a CSV file, or if an error occurs during processing.
    
    Requirements:
    - subprocess
    - csv
    - glob
    - random
    - os

    Example:
    >>> task_func('/path/to/file.csv')
    ['/path/to/split_00', '/path/to/split_01', ...]
    """
    # Check if file exists
    if not os.path.exists(file):
        return []
    
    # Check if file is a CSV file
    if not file.endswith('.csv'):
        return []
    
    try:
        # Use split command to divide the file into smaller files
        # The split command creates files with prefix 'split_' and suffixes like '00', '01', etc.
        subprocess.run(['split', '--lines=1000', file, 'split_'], check=True, capture_output=True)
        
        # Get all the split files
        split_files = glob.glob('split_*')
        
        # Sort the files to ensure consistent order
        split_files.sort()
        
        # Shuffle lines in each split file
        for split_file in split_files:
            with open(split_file, 'r', newline='') as f:
                reader = csv.reader(f)
                lines = list(reader)
            
            # Shuffle the lines
            random.shuffle(lines)
            
            # Write back the shuffled lines
            with open(split_file, 'w', newline='') as f:
                writer = csv.writer(f)
                writer.writerows(lines)
        
        return split_files
        
    except subprocess.CalledProcessError:
        # If split command fails, return empty list
        return []
    except Exception:
        # If any other error occurs, return empty list
        return []
```

Test output (stdout)

.....                                                                    [100%]
5 passed in 0.03s

System prompt

You are an expert programmer. Solve the task exactly as specified. Output your solution as fenced code blocks using the required file name(s) and the exact function/type signatures requested. Prefer correctness; do not include prose outside code unless asked.