How to replace keywords in byte strings in Python?
In Python, when a string begins with a lowercase letter "b", it means that the string is a byte string (bytes string) rather than a normal Unicode string (str). Byte strings are processed in units of bytes, not characters.
Byte strings represent text data using a sequence of bytes, each of which can be represented as an integer between 0 and 255. This representation is useful when working with binary data, network communication, or when you need to interact with other programming languages.
Here's an example showing a byte string starting with a lowercase "b":
data = b"Hello, world!"
The following is a sample code to replace keywords in byte strings in Python:
contents = '这是一个包含香港的字节字符串'
contents_bytes = contents.encode('utf-8')
# 将中文字符转换为字节表示形式
chinese_old = '香港'
chinese_new = '四川'
bytes_old = chinese_old.encode('utf-8')
bytes_new = chinese_new.encode('utf-8')
# 使用replace()方法替换字节字符串中的中文字符
new_contents = contents_bytes.replace(bytes_old, bytes_new)
# 将替换后的字节字符串转换为普通字符串进行显示
new_contents_str = new_contents.decode('utf-8')
print(new_contents_str)
The running results are as follows:
You can experience the difference between byte strings and ordinary Unicode strings (str) from the above results.