Python: 统计代码行数

#!/usr/bin/env python3

import os, sys, getopt

thisFile = os.path.splitext(os.path.basename(__file__))[0]
thisVersion = '1.0.0'

# 输出程序标题
def printTitle():
    title = 'Line Counter by Meniny'
    sep = ''
    for i in range(len(title) + 2):
        sep += '-'
    print(sep + '\n ' + title + '\n' + sep)

# 输出帮助信息
def help():
    print(thisFile + '(' + thisVersion + ')'+ ' Usage:')
    print('-h, --help:         show this help message')
    print('-v, --version:      show version info')
    print('--p, --path:        Setter path with argument')
    print('--d, --detail:      enable detail log')
    print('--e, --exception:   enable exception log')
    print('--r, --redirection: optimize log for redirection')

# 输出版本信息
def version():
    print(thisFile + ' Version: ' + thisVersion)

# 结束程序
def exit():
    sys.exit(1)

def main(argv):
    printTitle()
    extensions = ['.h', '.m', '.swift', '.js', '.mm', '.c', '.cpp', '.py', '.rb', '.hs', '.sh', '.java', '.pr']
    totalCount = 0
    fileCount = 0
    try:
        # 提取选项与参数
        opts, args = getopt.getopt(argv[1:], 'hvo:', ['path=', 'detail', 'exception', 'redirection'])
        # 初始化路径与输出设置
        folder = ''
        detailBool = False
        exceptionBool = False
        redirectionBool = False
        # 校验选项和参数
        shouldAnalyse = True
        for o, a in opts:
            if o in ('-h', '--help'):
                help()
                shouldAnalyse = False
            elif o in ('-v', '--version'):
                version()
                shouldAnalyse = False
            elif o in ('--p', '--path'):
                folder = a
            elif o in ('--d', '--detail'):
                detailBool = True
            elif o in ('--e', '--exception'):
                exceptionBool = True
            elif o in ('--r', '--redirection'):
                redirectionBool = True
        if not shouldAnalyse:
            exit()
        hasOpts = len(opts) > 0
        if not hasOpts and len(folder) <= 0:
            # 路径为空且没有选项，输入路径
            folder = input('Path of project: ') + ''
        # 如果输入的路径为.或./或空，则设置为当前路径
        if folder == '.' or folder == './' or len(folder) <= 0:
            folder = os.getcwd()
        if not os.path.exists(folder):
            # 非法路径，提示并退出
            print('Invalid path!\n')
            exit()
        print('Path: ' + folder)
        # 如果没有选项，则询问输出设置
        if not hasOpts:
            if not detailBool:
                detail = input('Enable detail log? (y/n): ')
                detailBool = detail == 'y' or detail == 'Y'
            if not exceptionBool:
                exception = input('Enable exception log? (y/n): ')
                exceptionBool = exception == 'y' or exception == 'Y'
            if not detailBool and not redirectionBool:
                redirection = input('Optimize log for redirection? (y/n): ')
                redirectionBool = redirection == 'y' or redirection == 'Y'
        # 显示输出设置的状态
        print('Log Status:')
        if detailBool:
            print('Detail log enabled')
        else:
            print('Detail log disabled')
        if exceptionBool:
            print('Exception log enabled')
        else:
            print('Exception log disabled')
        if redirectionBool:
            print('Log optimized for redirection')
        else:
            print('Log NOT optimized for redirection')
        print('Analyzing...')
        # 遍历目录
        for root, dirs, files in os.walk(folder):
            # 遍历文件
            for fileName in files:
                # 后缀名是需要统计的文件后缀
                if os.path.splitext(fileName)[1] in extensions:
                    path = os.path.join(root, fileName)
                    if os.path.exists(path):
                        # 存在则打开
                        handler = open(path, "rU", 1, "utf8")
                        try:
                            fileCount += 1
                            thisCount = 0
                            for line in handler:
                                # 统计非空行
                                if line.split():
                                    thisCount += 1
                            totalCount += thisCount
                            # 输出每个文件及行数
                            if detailBool:
                                print('%i - %s' %(thisCount, path))
                            else:
                                # 输出处理进度
                                if redirectionBool:
                                    print('Handled file(s): %i, Non-blank line(s): %i' %(fileCount, totalCount), end='\r')
                        except Exception as exp:
                            # 输出解析错误的信息
                            if not exceptionBool:
                                print('\nERROR: %s\nFILE: %s\n' %(exp, path))
                        finally:
                            handler.close()
        # 全不解析完毕，输出统计结果
        print('You have %i non-blank line(s) of code in %i file(s).'%(totalCount, fileCount))
        print('The valid file extensions are %s' %extensions)
    except getopt.GetoptError as err:
        # 错误的选项，输出错误并退出
        print(str(err))
        help()
        exit()

if __name__ == '__main__':
    main(sys.argv)