第5次实践作业

目录

• 一、构建镜像
• 二、程序运行
  • 1.helloworld
  • 2.日历输出
  • 3.mysql数据库操作
  • 4.opencv程序

一、构建镜像

• Dockerfile

FROM python:3
WORKDIR /usr/src/app
COPY requirements.txt ./

RUN pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple

ENTRYPOINT ["python"]

• requirements

PyMySQL
opencv-python

创建镜像

sudo docker build -t mypython .

二、程序运行

1.helloworld

• helloworld.py

print("Hello World")

• 运行

sudo docker run -it -v ~/docker_py/app:/usr/src/app --rm mypython helloworld.py

2.日历输出

• mycalendar.py

# 引入日历模块
import calendar
 
# 输入指定年月
yy = int(input("输入年份: "))
mm = int(input("输入月份: "))
 
# 显示日历
print(calendar.month(yy,mm))

• 运行

sudo docker run -it -v ~/docker_py/app:/usr/src/app --rm mypython mycalendar.py

3.mysql数据库操作

• sql.py

import pymysql
 
# 打开数据库连接
db = pymysql.connect(host="mymysql",user="docker",passwd="123456",db="docker_mysql",port=3306)
 
# 使用 cursor() 方法创建一个游标对象 cursor
cursor = db.cursor()
 
# 使用 execute()  方法执行 SQL 查询 
cursor.execute("SELECT VERSION()")
 
# 使用 fetchone() 方法获取单条数据.
data = cursor.fetchone()
 
print ("Database version : %s " % data)


# 使用 execute() 方法执行 SQL，如果表存在则删除
cursor.execute("DROP TABLE IF EXISTS STUDENT")

# 使用预处理语句创建表
sql = """CREATE TABLE STUDENT (
         ID CHAR(20) NOT NULL,
         NAME CHAR(20) NOT NULL,
         AGE INT,
         SEX CHAR(10),
         MAJOR CHAR(30) )"""

cursor.execute(sql)

# SQL 插入语句
sql = """INSERT INTO STUDENT(ID,
         NAME, AGE, SEX, MAJOR)
         VALUES ('111700312', 'hhn', 20, 'Male', 'computer science')"""
try:
   # 执行sql语句
   cursor.execute(sql)
   # 提交到数据库执行
   db.commit()
except:
   # 如果发生错误则回滚
   db.rollback()

sql = """INSERT INTO STUDENT(ID,
         NAME, AGE, SEX, MAJOR)
         VALUES ('123456789', 'test', 18, 'Female', 'English')"""
try:
   # 执行sql语句
   cursor.execute(sql)
   # 提交到数据库执行
   db.commit()
except:
   # 如果发生错误则回滚
   db.rollback()

# SQL 查询语句
sql = "SELECT * FROM STUDENT 
       WHERE AGE >= 18"
try:
   # 执行SQL语句
   cursor.execute(sql)
   # 获取所有记录列表
   results = cursor.fetchall()
   for row in results:
      ID = row[0]
      NAME = row[1]
      AGE = row[2]
      SEX = row[3]
      MAJOR = row[4]
       # 打印结果
      print ("id=%s,name=%s,age=%s,sex=%s,major=%s" % 
             (ID, NAME, AGE, SEX, MAJOR ))
except:
   print ("Error: unable to fetch data")

# SQL 更新语句
sql = "UPDATE STUDENT SET AGE = AGE + 1 WHERE SEX = '%s'" % ('Male')
try:
   # 执行SQL语句
   cursor.execute(sql)
   # 提交到数据库执行
   db.commit()
except:
   # 发生错误时回滚
   db.rollback()

# SQL 查询语句
sql = "SELECT * FROM STUDENT 
       WHERE AGE >= 18"
try:
   # 执行SQL语句
   cursor.execute(sql)
   # 获取所有记录列表
   results = cursor.fetchall()
   for row in results:
      ID = row[0]
      NAME = row[1]
      AGE = row[2]
      SEX = row[3]
      MAJOR = row[4]
       # 打印结果
      print ("id=%s,name=%s,age=%s,sex=%s,major=%s" % 
             (ID, NAME, AGE, SEX, MAJOR ))
except:
   print ("Error: unable to fetch data")




# SQL 删除语句
sql = "DELETE FROM STUDENT WHERE AGE >= %s" % (20)
try:
   # 执行SQL语句
   cursor.execute(sql)
   # 提交修改
   db.commit()
except:
   # 发生错误时回滚
   db.rollback()

# SQL 查询语句
sql = "SELECT * FROM STUDENT 
       WHERE AGE >= 18"
try:
   # 执行SQL语句
   cursor.execute(sql)
   # 获取所有记录列表
   results = cursor.fetchall()
   for row in results:
      ID = row[0]
      NAME = row[1]
      AGE = row[2]
      SEX = row[3]
      MAJOR = row[4]
       # 打印结果
      print ("id=%s,name=%s,age=%s,sex=%s,major=%s" % 
             (ID, NAME, AGE, SEX, MAJOR ))
except:
   print ("Error: unable to fetch data")

# 关闭数据库连接
db.close()

运行之前的mysql容器

sudo docker run --name mymysql -d mymysql

• 运行

sudo docker run -it -v ~/docker_py/app:/usr/src/app --rm --link=mymysql mypython sql.py

4.opencv程序

• opencv.py

import cv2
import numpy as np

img = cv2.imread('test.jpg',0)
rows,cols = img.shape

M = np.float32([[1,0,100],[0,1,50]])
dst = cv2.warpAffine(img,M,(cols,rows))

cv2.imwrite("test-output.jpg", dst, [int(cv2.IMWRITE_JPEG_QUALITY), 100])

• 运行

sudo docker run -it -v ~/docker_py/app:/usr/src/app --rm --link=mymysql mypython opencv.py

• tree

.
├── Dockerfile
├── app
│   ├── helloworld.py
│   ├── mycalendar.py
│   ├── opencv.py
│   ├── sql.py
│   ├── test-output.jpg
│   └── test.jpg
└── requirements.txt