《笨办法学Python3》练习二十三：字符串，字节和字符编码

练习代码

import sys
script, encoding, errors = sys.argv

def main(language_file, encoding, errors):
    line = language_file.readline()
    if line:
        print_line(line, encoding, errors)
        return main(language_file, encoding, errors)

def print_line(line, encoding, errors):   
    next_lang = line.strip()
    raw_bytes = next_lang.encode(encoding, errors = errors)
    cooked_string = raw_bytes.decode(encoding, errors = errors)

    print(raw_bytes, "<===>", cooked_string)
languages_file = open("languages.txt", encoding = "utf-8")
main(languages_file, encoding, errors)

补充

1. encode和decode互为逆操作，encode是将字符串中的字符都转化为encoding属性指定的编码，转化后的又叫raw string。

2. errors属性制定的是编码错误后的操作方式，有很多值：strict是报UnicodeError错误；ignore是忽略；replace是指替代正确部分。