如何将含重复项的嵌套列表保存为去重的逗号分隔TXT文件

Below are practical examples for each Markdown formatting rule:

Headings #

Use number signs (#) to define heading levels:

Level 2 Heading #

Level 3 Heading #

Unordered Lists #

Start each item with a dash (-), and indent for nested items:

• Primary list item
• Another primary item
  • Nested sub-item
  • Second nested sub-item

Text Emphasis #

Wrap text with asterisks to add emphasis:

• Italicized text (single asterisks)
• Bold text (double asterisks)

Code & Commands #

Surround code snippets or terminal commands with backticks (`):

• Inline code: git commit -m "Update file"
• Multi-line code block:

def greet(name):
    print(f"Hello, {name}!")

Block Quotes #

Use greater than signs (>) for quoted content:

This is a blockquote.
It can span multiple lines for longer quoted passages.

Links #

Format links with display text in square brackets, followed by the URL in parentheses:
Project Documentation

Images #

For images, include alt text in square brackets followed by the image URL in parentheses:
Scenic Mountain View

内容的提问来源于stack exchange，提问作者Yvar