Python reads txt file

1. Preparation

The file name is "info.txt" and the
content of the file is as follows:

Welcome to learn Python language
Chapter 1: Python past and present
Chapter 2: Python language basics
Chapter 3: Python advanced advanced

2. Code

text_file = open('info.txt', 'rt', encoding='utf-8')
for line in text_file.readlines():
    print(line, end='')
text_file.close()

or

text_file = open('info.txt', 'rt', encoding='utf-8')
content = text_file.read()
print(content)
text_file.close()

or

with open('info.txt', 'rt', encoding='utf-8') as text_file:
    content = text_file.read()
    print(content)

or

with open('info.txt', 'rt', encoding='utf-8') as text_file:
    for line in text_file.readlines():
        print(line, end='')

3. Results

4. Description

In my environment, if there is no parameter, "encoding=utf-8", an error will be reported.
The error content is: UnicodeDecodeError:'gbk' codec can't decode byte 0xad in position 20: illegal multibyte sequence