qrcode + zbar 图和用python生成和识别二维码_zbar 库版本支持 utf-8 编码

转载自：https://www.cnblogs.com/dcb3688/p/4241048.html

1.生成二维码

python生成二维码是件很简单的事，使用第三方库Python QRCode就可生成二维码，我用Pyqt给QRcode打个壳

一.python-qrcode介绍

python-qrcode是个用来生成二维码图片的第三方模块，依赖于 PIL 模块和 qrcode 库。

PIL下载地址：

 https://pypi.python.org/pypi/PIL/1.1.6         或

 http://www.pythonware.com/products/pil/

qrcode下载地址： 

https://pypi.python.org/pypi/qrcode

安装：

1 python setup.py install 

简单用法

1 import qrcode 
2 img = qrcode.make('hello, qrcode')
3 img.save('test.png')

高级用法

 

 1 import qrcode 
 2 qr = qrcode.QRCode(     
 3     version=1,     
 4     error_correction=qrcode.constants.ERROR_CORRECT_L,     
 5     box_size=10,     
 6     border=4, 
 7 ) 
 8 qr.add_data('hello, qrcode') 
 9 qr.make(fit=True)  
10 img = qr.make_image()
11 img.save('test.png')

 

参数说明：

 

二. 打壳

做一个Ui转换为Py文件， import qrcode 后就可以生成二维码了

完整代码如下：

  1 # -*- coding: utf-8 -*-
  2 
  3 # Form implementation generated from reading ui file 'Qrcode.ui'
  4 #
  5 # Created: Thu Jan 22 09:32:41 2015
  6 #      by: PyQt4 UI code generator 4.10.3
  7 #
  8 # WARNING! All changes made in this file will be lost!
  9 
 10 from PyQt4 import QtCore, QtGui
 11 
 12 try:
 13     _fromUtf8 = QtCore.QString.fromUtf8
 14 except AttributeError:
 15     def _fromUtf8(s):
 16         return s
 17 
 18 try:
 19     _encoding = QtGui.QApplication.UnicodeUTF8
 20     def _translate(context, text, disambig):
 21         return QtGui.QApplication.translate(context, text, disambig, _encoding)
 22 except AttributeError:
 23     def _translate(context, text, disambig):
 24         return QtGui.QApplication.translate(context, text, disambig)
 25 
 26 class Ui_qrcode(object):
 27     def setupUi(self, qrcode):
 28         qrcode.setObjectName(_fromUtf8("qrcode"))
 29         qrcode.setEnabled(True)
 30         qrcode.resize(515, 424)
 31         self.groupBoxshow = QtGui.QGroupBox(qrcode)
 32         self.groupBoxshow.setGeometry(QtCore.QRect(50, 120, 431, 281))
 33         sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Preferred, QtGui.QSizePolicy.Preferred)
 34         sizePolicy.setHorizontalStretch(0)
 35         sizePolicy.setVerticalStretch(0)
 36         sizePolicy.setHeightForWidth(self.groupBoxshow.sizePolicy().hasHeightForWidth())
 37         self.groupBoxshow.setSizePolicy(sizePolicy)
 38         self.groupBoxshow.setMinimumSize(QtCore.QSize(0, 0))
 39         self.groupBoxshow.setAutoFillBackground(True)
 40         self.groupBoxshow.setCheckable(False)
 41         self.groupBoxshow.setObjectName(_fromUtf8("groupBoxshow"))
 42         self.label = QtGui.QLabel(self.groupBoxshow)
 43         self.label.setGeometry(QtCore.QRect(10, 20, 401, 241))
 44         self.label.setText(_fromUtf8(""))
 45         self.label.setObjectName(_fromUtf8("label"))
 46         self.groupBox = QtGui.QGroupBox(qrcode)
 47         self.groupBox.setGeometry(QtCore.QRect(50, 20, 431, 91))
 48         self.groupBox.setObjectName(_fromUtf8("groupBox"))
 49         self.horizontalLayoutWidget = QtGui.QWidget(self.groupBox)
 50         self.horizontalLayoutWidget.setGeometry(QtCore.QRect(10, 10, 401, 80))
 51         self.horizontalLayoutWidget.setObjectName(_fromUtf8("horizontalLayoutWidget"))
 52         self.horizontalLayout = QtGui.QHBoxLayout(self.horizontalLayoutWidget)
 53         self.horizontalLayout.setMargin(0)
 54         self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
 55         self.label_url = QtGui.QLabel(self.horizontalLayoutWidget)
 56         self.label_url.setObjectName(_fromUtf8("label_url"))
 57         self.horizontalLayout.addWidget(self.label_url)
 58         self.lineEditInput = QtGui.QLineEdit(self.horizontalLayoutWidget)
 59         self.lineEditInput.setObjectName(_fromUtf8("lineEditInput"))
 60         self.horizontalLayout.addWidget(self.lineEditInput)
 61         self.pushButtonOk = QtGui.QPushButton(self.horizontalLayoutWidget)
 62         self.pushButtonOk.setObjectName(_fromUtf8("pushButtonOk"))
 63         self.horizontalLayout.addWidget(self.pushButtonOk)
 64 
 65         self.retranslateUi(qrcode)
 66         QtCore.QMetaObject.connectSlotsByName(qrcode)
 67 
 68     def retranslateUi(self, qrcode):
 69         qrcode.setWindowTitle(_translate("qrcode", "Pyqt Qrcode", None))
 70         self.groupBoxshow.setTitle(_translate("qrcode", "二维码显示", None))
 71         self.groupBox.setTitle(_translate("qrcode", "填写二维码内容", None))
 72         self.label_url.setText(_translate("qrcode", "URL地址：", None))
 73         self.pushButtonOk.setText(_translate("qrcode", "生成二维码", None))
 74 
 75 
 76 import qrcode
 77 class showQr(QtGui.QWidget):
 78     def __init__(self):
 79         super(showQr, self).__init__()
 80         self.ui_qr = Ui_qrcode()
 81         self.ui_qr.setupUi(self)
 82         # PyQT禁止窗口最大化按钮：
 83         self.setWindowFlags(QtCore.Qt.WindowMinimizeButtonHint)
 84         # PyQT禁止调整窗口大小:
 85         self.setFixedSize(self.width(), self.height())
 86 
 87         # 触发信号槽
 88         QtGui.QWidget.connect(self.ui_qr.pushButtonOk, QtCore.SIGNAL('clicked()'), self.generateQr) 
 89         # self.ui_qr.pushButtonOk.clicked.connect(self.generateQr)
 90 
 91     def generateQr(self):
 92         textcontent=self.ui_qr.lineEditInput.text()
 93         if textcontent=='':
 94             QtGui.QMessageBox.information(self, (u'提示'),(u'请填写URL地址'),QtGui.QMessageBox.Yes)
 95         else:
 96             filename='Qrcode.png'
 97             qr = qrcode.QRCode(
 98                 version=None,
 99                 error_correction=qrcode.constants.ERROR_CORRECT_L,
100                 box_size=5,
101                 border=4,
102             )
103             qr.add_data(textcontent)
104             qr.make(fit=True)
105             img = qr.make_image()
106             img.save(filename)
107             # img = qrcode.make(textcontent)
108             # img.save(filename)
109             self.ui_qr.label.setPixmap(QtGui.QPixmap(filename))
110 
111 
112 
113      # 重载keyPressEvent ，  当按下Esc退出
114     def keyPressEvent(self, event):
115         if event.key() ==QtCore.Qt.Key_Escape:
116             self.close()
117 
118 
119 if __name__ == "__main__":
120     import sys
121     app = QtGui.QApplication(sys.argv)
122     qr = showQr()
123     qr.show()
124     sys.exit(app.exec_())

运行效果：

 

---

2.识别二维码

解析二维码用到zbar模块

扯蛋的zbar 在Pypi中只有py25 和py26 版本，更新时间还是2009年， 下载后py27还用不了！ 

最后在github 中找到支持Py27的zbar库  

地址： https://github.com/jacobvalenta/zbar-py27-msi

one_qr_code.png

代码：

 1 from PIL import Image
 2 import zbar
 3 
 4 def get_QR():
 5     scanner = zbar.ImageScanner()
 6     scanner.parse_config("enable")
 7     pil = Image.open("one_qr_code.png").convert('L')
 8     width, height = pil.size
 9     raw = pil.tostring()
10     image = zbar.Image(width, height, 'Y800', raw)
11     scanner.scan(image)
12     data = ''
13     for symbol in image:
14         data+=symbol.data
15     del(image)
16     return data
17 
18 qrdata= get_QR()
19 print(qrdata)

 

返回解析结果：

http://weixin.qq.com/r/n0zE3NfEaooVrZO-9xmN