Add slow_query case

chapter11/section3/chart_styles.py

@@ -0,0 +1,36 @@
+# coding=utf-8
+# From http://bit.ly/2beWXlj
+import xlsxwriter
+
+workbook = xlsxwriter.Workbook('chart_styles.xlsx')
+
+# Show the styles for all of these chart types.
+chart_types = ['column', 'area', 'line', 'pie']
+
+for chart_type in chart_types:
+
+    # Add a worksheet for each chart type.
+    worksheet = workbook.add_worksheet(chart_type.title())
+    worksheet.set_zoom(30)
+    style_number = 1
+
+    # Create 48 charts, each with a different style.
+    for row_num in range(0, 90, 15):
+        for col_num in range(0, 64, 8):
+
+            chart = workbook.add_chart({'type': chart_type})
+            chart.add_series({'values': '=Data!$A$1:$A$6'})
+            chart.set_title({'name': 'Style %d' % style_number})
+            chart.set_legend({'none': True})
+            chart.set_style(style_number)
+
+            worksheet.insert_chart(row_num, col_num, chart)
+            style_number += 1
+
+# Create a worksheet with data for the charts.
+data_worksheet = workbook.add_worksheet('Data')
+data = [10, 40, 50, 20, 10, 50]
+data_worksheet.write_column('A1', data)
+data_worksheet.hide()
+
+workbook.close()

chapter11/section3/pv_uv.py

@@ -62,7 +62,7 @@
 chart2.set_title({'name': '上周活动页 UV'})
 chart2.set_x_axis({'name': 'UV'})
 chart2.set_y_axis({'name': '数量'})
-chart2.set_style(42)
+chart2.set_style(33)
 worksheet2.insert_chart('A8', chart2, {'x_offset': 25, 'y_offset': 10})
 
 workbook.close()

chapter3/section3/example1.py

@@ -8,7 +8,7 @@
     cur.execute("SELECT VERSION()")
     ver = cur.fetchone()
     print "Database version : %s " % ver
-except MySQLdb.Error, e:
+except MySQLdb.Error as e:
     print "Error %d: %s" % (e.args[0], e.args[1])
     exit(1)
 finally:

chapter3/section3/logger_slow_query.py

@@ -0,0 +1,53 @@
+# coding=utf-8
+import logging
+from logging.handlers import RotatingFileHandler
+
+from flask import Flask, request, jsonify
+from flask_sqlalchemy import get_debug_queries
+
+from ext import db
+from users import User
+
+app = Flask(__name__)
+app.config.from_object('config')
+app.config['DATABASE_QUERY_TIMEOUT'] = 0.0001
+app.config['SQLALCHEMY_RECORD_QUERIES'] = True
+db.init_app(app)
+
+formatter = logging.Formatter(
+    "[%(asctime)s] {%(pathname)s:%(lineno)d} %(levelname)s - %(message)s")
+handler = RotatingFileHandler('slow_query.log', maxBytes=10000, backupCount=10)
+handler.setLevel(logging.WARN)
+handler.setFormatter(formatter)
+app.logger.addHandler(handler)
+
+with app.app_context():
+    db.drop_all()
+    db.create_all()
+
+
+@app.route('/users', methods=['POST'])
+def users():
+    username = request.form.get('name')
+
+    user = User(username)
+    print 'User ID: {}'.format(user.id)
+    db.session.add(user)
+    db.session.commit()
+
+    return jsonify({'id': user.id})
+
+
+@app.after_request
+def after_request(response):
+    for query in get_debug_queries():
+        if query.duration >= app.config['DATABASE_QUERY_TIMEOUT']:
+            app.logger.warn(
+                ('\nContext:{}\nSLOW QUERY: {}\nParameters: {}\n'
+                 'Duration: {}\n').format(query.context, query.statement,
+                                          query.parameters, query.duration))
+    return response
+
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=9000)