Python & file operation mode

create/read/write/append mode

https://docs.python.org/3/library/functions.html#open

#!/usr/bin/env python3

# coding: utf8

__author__ = 'xgqfrms'

__editor__ = 'vscode'

__version__ = '1.0.1'

__copyright__ = """

  Copyright (c) 2012-2050, xgqfrms; mailto:xgqfrms@xgqfrms.xyz

"""

"""

  /**

   *

   * @author xgqfrms

   * @license MIT

   * @copyright xgqfrms

   * @created 2020-08-01

   *

   * @description

   * @augments

   * @example

   * @link

   *

  */

"""

print("write mode & close")

# append

# file = open("newfile.py", "w+a")

# file = open("newfile.py", "wa")

# ValueError: must have exactly one of create/read/write/append mode

# file = open("newfile.py", "ab+")

# TypeError: a bytes-like object is required, not 'str'

file = open("newfile.py", "a")

appended_length = file.write("appended text")

print("appended_length =", appended_length)

# appended_length = 13

file.close()

with open("newfile.py", "a") as file:

  appended_length = file.write("\nappended text, again")

  print("appended_length =", appended_length)

  # appended_length = 21

  file.close()

refs

Python 2, Abandoned

https://docs.python.org/2/library/functions.html#open

---

---

xgqfrms 2012-2020

www.cnblogs.com 发布文章使用：只允许注册用户才可以访问！

---