获取 py文件代码行数（过滤有注释和空行的代码）

# -*- encoding=utf8 -*-
# Created Date: 2021/10/11
# @Author: "jiliqian"
import re, os
code_file_source = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'lianxi1.py')
def get_lines():
    if '.py' in code_file_source:
        comment_line = 0
        blank_line = 0
        multi_comment_line = 0
        with open(code_file_source,encoding='utf-8', mode='r+') as f:
            lines = f.readlines()
            line_index = 0
            if len(lines) == 0:
                print("此.py文件代码内容为空")
            else:
                while line_index < len(lines):
                    line = lines[line_index]
                    if line.startswith("#"):
                        comment_line += 1  # 检查是否为#注释
                    elif line == 'n':
                        blank_line += 1  # 检查是否为空行
                    elif line.startswith("'''"):
                        multi_comment_line = +1 #检查是否为多行注释
                    line_index += 1
            lines_after_alter = int(len(lines)) - int(comment_line) - int(blank_line) - int(multi_comment_line)
            print(lines_after_alter)  # 输出python文件代码行数
    else:
        print("此文件夹下无.py文件")
if __name__=='__main__':
    get_lines()