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and small changes to follow PEP8 code style

change default README to Chinese

README_en.md

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+NeteaseMusicLyricDownloader
+===========================
+[简体中文](https://github.com/1826013250/NeteaseMusicLyricDownloader)|**English**
+
+A simple tool to download lyrics in Netease Music
+
+_*Caution:* The author is not native English speaker. If there are some grammar mistakes, please ignore them. Thanks!!!!_
+
+## How does it work?
+It uses the module `requests` to fetch the lyric on music.163.com
+
+Netease Music supply us an api that we can get the lyric of the current song, so I make this program...
+
+## Installation
+First, you need a python(>=3.10) environment
+
+Second, clone the entire project and install packages with the command below:
+```commandline
+python3 -m pip install -r requirements.txt
+```
+Last, run the command `python3 main.py` in the project folder.
+
+## What can it do?
+Just download lyrics.
+
+You need to provide the id or the share link of the song, and the program will download the lyrics automatically.
+
+Now it can recognize 163 key in music files that download from Netease Cloudmusic client.
+
+- 2022/8/13 Now it has the function from `ncmdump`, and it can decrypt the ncm files and fetch the specific lyric.
+
+## Todo
+
+Add more functions like searching...
+
+## Others
+
+Just a easy program...
+
+I don't have much time to focus on it...