README.md · sina_woker/qrcode

# QR-Code
[*转到中文版*](https://github.com/sylnsfar/qrcode/blob/master/README-cn.md)

* **update (160906)**: added an **exe** version - [myqr.exe in qrcode_win](https://github.com/sylnsfar/qrcode_win)

* **update (160908)**: added a **web** version - [amazing-qrcode](http://www.amazing-qrcode.com/) *(made by [Maras0830](https://github.com/Maras0830))*

* **update (160910)**: distributed to **PyPI** - [**MyQR**](https://pypi.python.org/pypi/MyQR) !

* 160911: updated to be importable

## Overview

**Python QR Code Generator**

Generate *common qr-code*,  *artistic qr-code (black & white or colorized)*,  *animated qr-code (black & white or colorized)*.

## Contents

* [Overview](#overview)
* [Contents](#contents)
* [Examples](#examples)
* [Install](#install)
* [Usage](#usage)
  * [Terminal Way](#terminal-way)
  * [Import Way](#import-way)
* [Tips](#tips)
* [Supported Characters](#supported-characters)
* [Dependencies](#dependencies)
* [Environment](#environment)
* [License](#license)

## Examples

![](https://github.com/sylnsfar/qrcode/blob/master/example/qrs0.jpg)

![](https://github.com/sylnsfar/qrcode/blob/master/example/qrs1.jpg)

![](https://github.com/sylnsfar/qrcode/blob/master/example/qrs2.jpg)

![](https://github.com/sylnsfar/qrcode/blob/master/example/c_qrcode.gif)![](https://github.com/sylnsfar/qrcode/blob/master/example/daftpunktocat-guy_qrcode.gif)

![](https://github.com/sylnsfar/qrcode/blob/master/example/zootopia_qrcode.gif)![](https://github.com/sylnsfar/qrcode/blob/master/example/daftpunktocat-guy_qrcode0.gif)

## Install

```python
# via pip
pip(3) install myqr(or MyQR)
```

## Usage

### Terminal Way

*(**TIPS**: If you haven't install [**MyQR**](https://pypi.python.org/pypi/MyQR), you should  `python(3) myqr.py` instead of `myqr` blow.)*

```python
# summary
myqr 	Words
		[-v {1,2,3,...,40}]
		[-l {L,M,Q,H}]
        [-n output-filename]
		[-d output-directory]
		[-p picture_file]
		[-c]
		[-con contrast]
		[-bri brightness]
```

- see [Common QR-Code](#common-qr-code) for `Words`, `-v`, `-l`, `-n`, `-d`
- see [Artistic QR-Code](#artistic-qr-code) for `-p`, `-c`, `-con`, `-bri`
- see [Animated GIF QR-Code](#animated-gif-qr-code) about GIF

#### Common QR-Code

![](https://github.com/sylnsfar/qrcode/blob/master/example/0.png)

```markdown
#1 Words
myqr https://github.com
```

* Just input a URL or a sentence, then get your QR-Code named 'qrcode.png' in the current directory.

```markdown
#2 -v, -l
myqr https://github.com -v 10 -l Q
```

* The **default** size of QR-Code depends both on the numbers of words you input and the level, while the **default** level (Error Correction Level) is **H** (the highest).

* **Customize**: If you want to control the size and the error-correction-level, use the `-v` and `-l` arguments.

`-v`  representing the length is from a minimum of **1** to a maximum of **40**.

`-l` representing the error correction level is one of **L, M, Q and H**, where L is the lowest level and H is the highest.

```markdown
#3 -n, -d
myqr https://github.com   -n github_qr.jpg   -d .../paths/
```

* The **default** output-filename is 'qrcode.png', while the **default** output-directory is current directory.

* **Customize**: You can name the output-file and decide the output-directory. **Notice** that if the name is as same as a existing file, the old one will be deleted.

`-n` representing the output-filename could be in the format one of `.jpg`， `.png` ，`.bmp` ，`.gif` .

`-d` means directory.

#### Artistic QR-Code

![](https://github.com/sylnsfar/qrcode/blob/master/example/1.png)![](https://github.com/sylnsfar/qrcode/blob/master/example/2.png)

```markdown
#1 -p
myqr https://github.com -p github.jpg
```

* The `-p` is to combine the QR-Code with the following picture which is in the same directory as the program. The resulting picture is **black and white** by default.

```markdown
#2 -c
myqr https://github.com -p github.jpg -c
```

* The `-c` is to make the resulting picture **colorized**.

```markdown
#3 -con, -bri
myqr https://github.com -p github.jpg [-c] -con 1.5 -bri 1.6
```

* The `-con` flag changes the **contrast** of the picture - a low number corresponds to low contrast and a high number to high contrast. **Default: 1.0**.

* The `-bri` flag changes the **brightness** and the parameter values work the same as those for `-con`. **Default: 1.0**.

#### Animated GIF QR-Code

![](https://github.com/sylnsfar/qrcode/blob/master/example/daftpunktocat-guy_qrcode.gif)![](https://github.com/sylnsfar/qrcode/blob/master/example/daftpunktocat-guy_qrcode0.gif)

The only difference from Artistic QR-Code mentioned above is that you should input an image file in the `.gif` format. The you can get your black-and-white or colorful qr-code. Remember that when you use `-n` to customize the output-filename, then the output-filename must end by `.gif`.

### Import Way

```python
# after installation
from MyQR import myqr
version, level, qr_name = myqr.run(
	words,
    version=1,
    level='H',
    picture=None,
    colorized=False,
    contrast=1.0,
    brightness=1.0,
    save_name=None,
    save_dir=os.getcwd()
	)
```

*details about each parameter are as mentioned [above](#terminal-way)*

```python
# help(myqr)
Positional parameter
   words: str

Optional parameters
   version: int, from 1 to 40
   level: str, just one of ('L','M','Q','H')
   picutre: str, a filename of a image
   colorized: bool
   constrast: float
   brightness: float
   save_name: str, the output filename like 'example.png'
   save_dir: str, the output directory
```

## Tips

* Use a nearly **square** picture instead of a rectangle one.

* If the size of the picture is large, you should also choose a **rightly** large `-v` instead of using the default one.

* If part of the picture is transparent, the qr code will look like: ![](https://github.com/sylnsfar/qrcode/blob/master/example/aa.png)

You can change the transparent layer to white, and then it will look like: ![](https://github.com/sylnsfar/qrcode/blob/master/example/a0.png)

## Supported Characters

* Numbers:  `0~9`

* Letters:  `a~z, A~Z`

* Common punctuations:

```console
  · , . : ; + - * / \ ~ ! @ # $ % ^ & ` ' = < > [ ] ( ) ? _ { } | and  (space)
  ```

## Dependencies

* [pillow](https://pypi.python.org/pypi/Pillow/3.3.1)
* [numpy](https://pypi.python.org/pypi/numpy)
* [imageio](https://pypi.python.org/pypi/imageio)

*(**TIPS**: Without a installed [**MyQR**](https://pypi.python.org/pypi/MyQR), you should use `pip install -r requirements.txt` to ensure you have all dependencies.)*

## Environment

* Linux, Python 3
* Windows, Python 3
* Mac, Python 3

## License

* GPLv3

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