#-*- coding: utf8 -*-
import odbc
import numpy as np
import pylab as pl
allDate = []
allData = []
if __name__ == '__main__':
    print("run success")
    allDate, allData  =  odbc.getData()
   # print(allDate)
    pl.plot(allDate,allData)
    pl.show()
else:
    print("run error")import pymysql as mysql
import time, datetime
mysql.install_as_MySQLdb()
def getData():
    try:
        # 獲取一個數據庫連線，注意如果是UTF-8型別的，需要制定資料庫
        conn = mysql.connect(host='xxx.xxx.xxx.xxx', user='xxx', passwd='xxx', db='xxx', port=xxx,
                             charset='utf8')
        cur = conn.cursor()  # 獲取一個遊標
        sql = """SELECT a.changenum,a.updatetime 
                  from xxxx a join xxxxx b 
                  on a.x = b.x 
                  where b.name = 'xxx'
                  and a.updatetime > '2017-07-01 00:00:00'
                  ORDER BY updatetime ASC"""
        cur.execute(sql)  # 遊標執行sql查詢語句
        data = cur.fetchall()  # fetchall()則是接收全部的返回結果行
        change_data = []
        change_date = []
        for d in data:  # 迴圈結果進行顯示
            change_data.append(d[0])
            change_date.append(d[1])
        cur.close()  # 關閉遊標
        conn.close()  # 關閉連線
    except Exception:
        print("查詢失敗")
    print(change_data)
    print(change_date)

    
    first_date = datetime.datetime.strptime(
        datetime.datetime.strftime(change_date[0], '%Y-%m-%d %H:%M:%S')[0:10] + " 00:00:00", '%Y-%m-%d %H:%M:%S')
    # 獲取第一個時間資料，取得日期部分，向前
    last_date = datetime.datetime.strptime(
        datetime.datetime.strftime(change_date[len(change_date) - 1], '%Y-%m-%d %H:%M:%S')[0:10] + " 00:00:00",
        '%Y-%m-%d %H:%M:%S') + datetime.timedelta(days=1)
    # 獲取最後一個時間資料，取得日期部分，向後
    # print(first_date)
    # print(last_date)
    date = []
    data = []
    temp_date = first_date
    n = 0
    num = 0
    #外層迴圈，每次增加半小時
    while temp_date < last_date:
        for i in range(n, len(change_date)):
            #內層迴圈，迴圈資料庫資料，在該半小時之內的變換情況
            if temp_date <= change_date[i] < temp_date + datetime.timedelta(minutes=30):
                num += change_data[i]
            else:
                break
        data.append(num)  # 對變化情況進行記錄以便於後續畫圖的Y軸資料
        num = 0
        n = i
        temp_date = temp_date + datetime.timedelta(minutes=30)  # 橫軸時間資料
        date.append(temp_date)

    print(len(date))
    print(len(data))
    print(date)
    print(data)
    return  date, data  # 因為未對齊到外層的getData()主函式，曾經導致出錯