python小知识点汇总

一 写mysql

场景：自动化用例中需要构造数据，写入redis

1. 表中已有该primary_key的记录，在现有基础上更新字段
2. 表中无该记录，需要插入

# 请求传入table字段，db.table，context为要添加的字段等，一般为json或dict
def add_table(context,table):
    # 获取db table及primary_id
    table_name = table
    db_name = 'default'        #默认的库名
    if "." in table:
        db_name = table.split('.')[0]
        table_name = table.split('.')[1]
    else:
        table = 'advert_dsp.'+table_name
    # 得到该表的primary_key
    sql = "select column_name from INFORMATION_SCHEMA.KEY_COLUMN_USAGE where table_name = '%s' and constraint_name = 'PRIMARY'" % (table_name)
    primary_key = command(db_name,sql)[0].get("column_name")
    # 若请求字段有primary_key，则指定记录操作
    result = 0
    context.text = eval(context.text) if context.text else None
    primary_value = context.text.get(primary_key) if (primary_key in context.text) else 0
    if primary_value:
        result = command(db_name,'select * from %s where %s=%s'%(table_name,primary_key,primary_value))
    """
    # 替换一些常量，可有可无
    for k,v in context.text.items():
        if v in AutoTest:
            context.text[k] = AutoTest.get(v)
    """
    # 场景1，表中已有对应记录，现有基础上更新
    if result:
        param = dict_to_set(context.text,",")
        #param = urllib.unquote(urllib.parse.urlencode(context.text).replace("&", ","))
        if param:
            sql_update = 'update %s set %s where %s=%s'%(table_name,param,primary_key,primary_value)
            command(db_name,sql_update)
    # 场景2，表中无对应记录，插入新数据
    else:
        context.params = DbData(**context.text).params[table]   #与默认值列表整合一下，补充默认值
        # 要插入的value中的双引号需要转义，dict.values是会单双引号配合，所以手动处理一下
        value_list = []
        for k, v in context.params.items():
            v = v.replace('"', '\"') if isinstance(v, str) else v
            value_list.append(str(v))
        values = '"' + '", "'.join(value_list) + '"'

        qmarks = ', '.join(['%s'] * len(context.params))
        cols = ', '.join(context.params.keys())
        # 可行方案
        sql = 'insert into '+table_name+'(%s) values(%s)' % (cols, values)
        command(db_name,sql)
        # 报错方案
　　　　　sql = 'insert into '+table_name+'(%s) values(%s)' % (cols, qmarks)
        command(db_name,sql,values)

报错方案：用的是msyql的execute(sql, param)

不知道为什么会报错，一样的key和value，方案1就正常，方案2就报错了：not enough arguments for format string

二  使用 flask mock 一个小服务

场景：要写一个mock服务或者其他

# -*- coding:utf-8 -*-

from flask import Flask
from flask import request
import sys,json,md5

reload(sys)
sys.setdefaultencoding("utf-8")


app = Flask(__name__)
@app.route('/others/getSignature',methods=['GET'])  //域名后的path，是个GET服务
def get_sig():
    project = request.args.get('project')   # 处理查询
    path = request.args.get('path')
    reqValue = eval(request.args.get('reqValue'))
    sig = ''
    str_request = ''
    timestamp = ''
    if project == 'meipai':
        secret_key = "bdaefd747c7d594f"
    request_value = sorted(reqValue.iteritems(),key = lambda asd:str(asd[1]))
    for key in request_value:
        str_request = str_request + str(key[1])
    str_temp = path + str_request + secret_key + timestamp
    m = md5.new()
    m.update(str_temp)
    tmp = m.hexdigest()
    for i in range(16):
        pos = i*2
        sig += tmp[pos+1]+tmp[pos]
    return sig

if __name__ == '__main__':
    app.run(debug=True,host='192.168.99.31',port=8002)