python / 默认 · March 26, 2023 0

To create, read, and write to a text and markdown file in Python

Table of Content

To create, read, and write to a file in Python

To create, read, and write to a file in Python, you can use the open() function. Here are some examples:

  1. Creating a file:

    file = open("filename.txt", "w")
    file.write("Hello world!")

    This will create a new file called "filename.txt" and write the string "Hello world!" to it.

  2. Reading a file:

    file = open("filename.txt", "r")
    contents =

    This opens the file "filename.txt" that we created in the previous example, reads its contents into the variable contents, and prints them to the console.

  3. Appending to a file:

    file = open("filename.txt", "a")
    file.write("\nThis is a new line.")

    This opens the file "filename.txt" in append mode and adds the string "\nThis is a new line." to the end of the file.

There are other modes you can use with open(), such as "r+" (read and write) and "a+" (read and append). For more information, check out the official Python documentation on file input/output.

To read and write Markdown files in Python

To read and write Markdown files in Python, you can use the markdown library, which provides a way to convert Markdown text to HTML and vice versa. Here’s an example of how to use it:

  1. Installing the markdown library:

    pip install markdown
  2. Reading a Markdown file:

    import markdown

with open("", "r") as f:
md_text =

html = markdown.markdown(md_text)

This reads a Markdown file called "", converts the text to HTML using the markdown() function, and prints the resulting HTML to the console.

3. Writing to a Markdown file:

import markdown

html = "<h1>Hello world!</h1>"
md_text = markdown.markdown(html)

with open("", "w") as f:

This writes the string "

Hello world!

" to a Markdown file called "" as converted Markdown text, using the write() function. Note that you can also use the markdown2 library, which is a newer version of the markdown library with some additional features. You can install it using pip install markdown2.
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