[Python知识库]python实现冗余编码串中索引串提取以及文本图片转二进制等

1、将文本，图片转换为二进制

toBinary.py

import io

import chardet
import numpy as np
from PIL import Image

def txt2byte(msg):
    return msg.encode(encoding="utf-8")

def image2byte(pic):
    img = Image.open(pic)
    img_bytes = io.BytesIO()
    img.save(img_bytes, format="JPEG")
    img_bytes = img_bytes.getvalue()
    return img_bytes

def byte2Array(byte):
    '''
    二进制字节流数据转化为 Array 格式
    '''
    byteStream = io.BytesIO(byte)
    image = Image.open(byteStream)
    arr=np.asarray(image)
    print('arr_shape: ', arr.shape)
    print('arr_value: ', arr)
    return arr

2、得到索引串

extract.py

n= 6
dt = []
dindex = []
index=[]
dict={'0':0,'1':0}
def str2index(str):
    x, y, k = 0, 0, 0
    for k in str:
        dt.append(k)
    for i in range(6):
        dindex=dt[i:30:6]
        for key in dindex:
            dict[key]+=1
        if(dict['0']>dict['1']):
            index.append('0')
        else:
            index.append('1')
        dict['0'] = 0
        dict['1'] = 0
    print("得到索引串："+"".join(index))
    return "".join(index)

3、连接数据库

conSql.py

import pymysql
def connect(str):
    # 1. 连接数据库，
    conn = pymysql.connect(
        host='localhost',
        user='root',
        password='asdfgh',
        db='index-msg',
        charset='utf8',
    )
    # 2. 创建游标对象用来给数据库发送sql语句，
    cur = conn.cursor()
    # 3). **************************数据库查询*****************************
    sql = "select msg from `message` where `index`="+str+";"
    cur.execute(sql)
    print(cur.fetchone())  # 1). 获取下一个查询结果集;
    # 4. 关闭游标
    cur.close()
    # 5. 关闭连接
    conn.close()