Bandit Skipping Directory and Unable to Output Report Error

Describe the bug

Command Used:
dist\run_bandit.exe -r C:\repo\python\kubernetes\base\config -f json -o result.json

Output:
Running Bandit with the following parameters: Report directory: C:\repo\python\kubernetes\base\config Output format: json Output file: result.json Discovering files in directory: C:\repo\python\kubernetes\base\config Skipping directory (C:\repo\python\kubernetes\base\config), use -r flag to scan contents Running Bandit tests... Outputting results with severity level 'LOW' and confidence level 'LOW' Error during output results: Unable to output report using 'screen' formatter: 'screen'

Script Used:

import sys
from bandit.core import manager as bandit_manager
from bandit.core import config as bandit_config

if __name__ == "__main__":
    # Argument parsing
    report_directory = None
    output_format = 'json'  # Default output format
    output_file = None

    # Parse arguments
    args = sys.argv[1:]
    for i in range(len(args)):
        if args[i] == '-r':
            report_directory = args[i + 1]
        elif args[i] == '-f':
            output_format = args[i + 1]
        elif args[i] == '-o':
            output_file = args[i + 1]

    # Ensure required arguments are provided
    if not report_directory:
        print("Error: Missing required '-r' argument for directory")
        sys.exit(1)

    # Print the command-line parameters for debugging
    print(f"Running Bandit with the following parameters:")
    print(f"Report directory: {report_directory}")
    print(f"Output format: {output_format}")
    print(f"Output file: {output_file if output_file else 'Not specified'}")

    # Load Bandit configuration
    config = bandit_config.BanditConfig()

    # Initialize Bandit manager
    b_mgr = bandit_manager.BanditManager(config, output_format)

    # Discover files and run tests
    print(f"Discovering files in directory: {report_directory}")
    b_mgr.discover_files([report_directory])
    if b_mgr.results_count == 0:
        print(f"No Python files found in '{report_directory}'. Please check the directory.")
        sys.exit(1)

    print("Running Bandit tests...")
    b_mgr.run_tests()

    # Generate the report
    lines = []  # Since the results will be written to the output file, we leave this empty
    sev_level = 'LOW'  # Severity level (LOW, MEDIUM, HIGH)
    conf_level = 'LOW'  # Confidence level (LOW, MEDIUM, HIGH)

    # Output results to the specified file or to console if no file is specified
    print(f"Outputting results with severity level '{sev_level}' and confidence level '{conf_level}'")
    
    try:
        b_mgr.output_results(lines, sev_level, conf_level, output_file, output_format)
    except Exception as e:
        print(f"Error during output results: {e}")
        sys.exit(1)

    # Exit with Bandit result code
    print(f"Bandit completed with {b_mgr.results_count} findings.")
    sys.exit(b_mgr.results_count)

PyInstaller Command Used:
pyinstaller --onefile --hidden-import=bandit.core.manager --hidden-import=stevedore.extension run_bandit.py

Reproduction steps

Run the command:
run_bandit.exe -r -f json -o result.json

Expected behavior

Bandit should discover Python files in the specified directory and generate a JSON report without errors.

Bandit version

1.7.10 (Default)

Python version

3.12

Additional context

No response

Start by reproducing the reported command with run_bandit.py and Bandit 1.7.10, then inspect how BanditManager.discover_files and output_results are called. Compare the observed directory-skipping and formatter error with the expected command-line behavior. Done means the specified directory is scanned and a JSON report is written without errors.