key_note 0.1

# Note
This is a tool for writing, restoring and retriving notes in command line. Here are some examples of command:


1. **note add/a note\_file**
add a note. the note file's first line is keywords seperated by whitespaces, the rest of lines are content.
2. **note delete/d [-r] keyword1 [keyword2...]**
delete the notes with the keywords
3. **note get/g keyword0 [keyword1 ... keywordN]**
print notes about the keyword(s)
4. **note change/c note\_file**
for the note with keywords in note\_file, the note in database will be changed.
5. **note scan/s**
dispaly the information of the notes which have stored.
6. **note -h**
display help infomation

# Implementation
For each note, it has two components which are keyword(s) and content.
In order to save the notes, a database is created. The database has two tables. One table is a dict, whose keys and values are the keywords and the note ids. Each id links to a note. The other table has three columns: the notes' ids, the keywords which the notes linked to, the note contents.

```
create table keywords (
keyword string primary key not null,
ids string not null
);

create table notes (
id integer primary key autoincrement,
keywords string not null,
content string not null
);
```

# to do
1. get notes with bool filter
2. suppert a gui