Four commonly used encapsulation functions of python interfaces (with source code)

foreword

It's time to share Python tips every day again. Today, I will share with you the commonly used encapsulation functions of Python interfaces. I believe that everyone is familiar with packaging, right?

I will show you four small cases. I won't talk nonsense, just go to the code.

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1. Encapsulate the function of uploading pictures

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.def upload_image(pathName, pathRoute, pathType, keyName=None):
    '''
    :param pathName:   图片名称
    :param pathRoute:  图片路径
    :param pathType:   图片类型
    :param keyName:    文件名称
    :return:
    '''
    file = open(pathRoute, 'rb')
    files = {
    
    
            keyName: (pathName, file, pathType)
    }
    return files

2. The function to encapsulate the license plate number

def chepaihao(len='6'):
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    char0 = '京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽赣粤青藏川宁琼'
    char1 = 'ABCDEFGHJKLMNPQRSTUVWXYZ'  # 车牌号中没有I和O，可自行百度
    char2 = '1234567890ABCDEFGHJKLMNPQRSTUVWXYZ'
    char3 = '1234567890'
    len0 = len(char0) - 1
    len1 = len(char1) - 1
    len2 = len(char2) - 1
    len3 = len(char3) - 1
    # while True:
    code = ''
    index0 = random.randint(1,len0)
    index1 = random.randint(1, len1)
    code += char0[index0]
    code += char1[index1]
    code += ' '
    for i in ran## 标题ge(1, 5):
        index2 = random.randint(1, len2)
        code += char2[index2]
    index3 = random.randint(1,len3)
    code += char3[index3]
    # test = re.match('^.\w.[A-Z]\d{4}$|^.\w.\d[A-Z]\d{3}$|^.\w.\d{2}[A-Z]\d{2}$|^.\w.\d{3}[A-Z]\d$|^.\w.\d{5}$',code)
    print(code)
    return code

3. Encapsulate the function to generate UUid

# 生成UUid
def uuid_():
    uid = uuid.uuid1()
    return uid.hex

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4. Encapsulate the function to connect to the database

import pymysql


# 获取连接方法
def get_db_conn():
    conn = pymysql.connect(host='地址',
                           port=000, # 端口号
                           user='name',
                           passwd='23456',
                           db='3454',  # 库名
                           cursorclass=pymysql.cursors.DictCursor)
    return conn

# 封装数据库查询单条操作
def query_db(sql):
    conn = get_db_conn()      
    cur = conn.cursor()        
    cur.execute(sql)           
    conn.commit()
    result = cur.fetchone()    
    cur.close()                
    conn.close()               
    return result

# 封装数据库查询所有操作
def query_all(sql):
    conn = get_db_conn()       
    cur = conn.cursor()        
    cur.execute(sql)           
    conn.commit()
    result = cur.fetchall()    
    cur.close()                
    conn.close()               
    return result

# 封装更改数据库操作
def change_db(sql):
    conn = get_db_conn()  
    cur = conn.cursor()  
    try:
        cur.execute(sql)  
        conn.commit()  
    except Exception as e:
        conn.rollback()  
    finally:
        cur.close()  
        conn.close()  
# 封装数据库新增所有操作
def insert_into(sql):
    conn = get_db_conn()      
    cur = conn.cursor()        
    cur.execute(sql)         
    conn.commit()
    result = cur.fetchall()    
    conn.close()              
    return result

At last

These are the more commonly used encapsulation functions, and you can collect them for emergencies. Today's sharing ends here, more content needs to be paid attention to in time

See. If you like it, remember to like it.

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