使用python写的一个代码统计程序

# encoding="utf-8"

"""
统计代码行数
"""

import sys
import os

def count_file_line(path):
    """统计文件的有效行数"""
    countLine = 0
    # 设置一个标志位，当遇到以"""或者'''开头或者结尾的时候，置为False
    flag = True

    # 使用utf-8格式的编码方式读取文件，如果读取失败，将使用gbk编码方式读取文件
    try:
        fp = open(path, "r", encoding="utf-8")
        encoding_type = "utf-8"
        fp.close()
    except:
        encoding_type = "gbk"

    with open(path, "r", encoding=encoding_type) as fp:
        for line in fp:
            # 空行不统计
            if line.strip():
                line = line.strip()
                # 注意下面的这两个elif必须要前面，这样子当('"""')结束之后及时将flag置为True
                if line.endswith('"""') and flag == False:
                    flag = True
                    continue
                if line.endswith("'''") and flag == False:
                    flag = True
                    continue
                if flag == False:
                    continue
                if line.startswith("#!") or line.startswith("#-*-") or line.startswith("# encoding"):
                    countLine += 1
                # 如果以“#”号开头的，不统计
                elif line.startswith("#"):
                    continue
                # 如果同时以("'''")或者('"""')开头或者结尾（比如："""aaa"""），那么不统计
                elif line.startswith('"""') and line.endswith('"""') and line != '"""':
                    continue
                elif line.startswith("'''") and line.endswith("'''") and line != "'''":
                    continue
                # 如果以("'''")或者('"""')开头或者结尾（比如：aaa"""或者"""bbb），那么不统计
                # 注意下面的这两个elif必须要放后面
                elif line.startswith('"""') and flag == True:
                    flag = False
                    continue
                elif line.startswith("'''") and flag == True:
                    flag = False
                    continue
                else:
                    countLine += 1
    return countLine

def count_codes(path,file_types=[]):
    """统计所有文件代码行"""
    # 判断path是目录还是文件，如果是目录的话，遍历目录下所有的文件
    if not os.path.exists(path):
        print("您输入的路径不存在！")
        return 0
    countTotalLine = 0
    file_paths = {}
    if os.path.isdir(path):
        for root,dirs,files in os.walk(path):
            for name in files:
                if not file_types:
                    file_types = ["txt","py"]
                    # print(file_types)
                if os.path.splitext(name)[1][1:] in file_types:
                    file_path = os.path.normpath(os.path.join(root,name))
                    # print(file_path)
                    file_lines = count_file_line(file_path)
                    countTotalLine += file_lines
                    file_paths[file_path] = file_lines
    else:
        if not file_types:
            file_types = ["txt","py"]
        if os.path.splitext(path)[1][1:] in file_types:
            countTotalLine = count_file_line(path)
            file_paths[path] = count_file_line(path)

    return countTotalLine,file_paths

if __name__ == "__main__":
    # 打印出命令行输入的参数
    # print(sys.argv)
    if len(sys.argv) < 2:
        print("请输入路径！")
        sys.exit()
    path = sys.argv[1]
    # print(path)
    file_types = sys.argv[2:]
    # print(file_types)
    print(count_codes(path,file_types))