# -*- coding: utf-8 -*-
"""
@use:查询17.11-18.1,18.6-18.8的PM2.5数据，导出到csv
"""
import pymssql
import xlwt
import datetime

from xml.dom.minidom import parse

def do():
try:
doc=parse('baseinfo.xml')
login=doc.getElementsByTagName("login")[0]
ip=login.getAttribute("ip")
user=login.getAttribute("user")
password=login.getAttribute("password")
database=login.getAttribute("database")

timerange=doc.getElementsByTagName("timerange")[0]
start=timerange.getAttribute("start")
end=timerange.getAttribute("end")

start1 =datetime.datetime.strptime(start, '%Y-%m-%d %H:%M:%S')
end1 = datetime.datetime.strptime(end, '%Y-%m-%d %H:%M:%S')
theHour=int((end1-start1).days*24 + (end1-start1).seconds/3600)+1
print(theHour)


conn=pymssql.connect(host=ip,user=user,password=password,database=database)
#查看连接是否成功
cursor = conn.cursor()
# sql = "select a.STATIONCODE,a.MONIDATE,b.LONGITUDE,b.LATITUDE,a.PM25 from T_MON_AIRSTATIONHOUR a join T_BAS_AIRSTATION b on a.STATIONCODE=b.STATIONCODE where MONIDATE='2018-09-21 15:00:00.000'"
#日期区间数据查询
#sql = "select a.STATIONCODE,a.MONIDATE,b.LONGITUDE,b.LATITUDE,a.PM25 from T_MON_AIRSTATIONHOUR a join T_BAS_AIRSTATION b on a.STATIONCODE=b.STATIONCODE where MONIDATE>='"+start+"' and MONIDATE<='"+end+"'"

for h in range(theHour):
monidate=(start1 + datetime.timedelta(hours=h)).strftime('%Y-%m-%d %H:%M:%S')
# print(monidate)
#单个时间数据查询
# sql = "select a.STATIONCODE,a.MONIDATE,b.LONGITUDE,b.LATITUDE,a.PM25 from T_MON_AIRSTATIONHOUR a join T_BAS_AIRSTATION b on a.STATIONCODE=b.STATIONCODE where MONIDATE='"+monidate+"'"
sql="select a.ID,a.RecordTime,b.LNG1,b.LAT1,a.PM25 from T_MIC_DATAAIR a join T_MIC_STATION b on a.ID=b.ID where b.STATIONTYPE='2' and a.RecordTime='"+monidate+"'"
#时间列，转换成 2018-09-21T15:00:00 格式
str_date=str(datetime.datetime.strptime(str(monidate), "%Y-%m-%d %H:%M:%S") )
str_date=str_date[0:10]+'T'+str_date[-8:]
cursor.execute(sql)
#用一个rs变量获取数据
rs = cursor.fetchall()
#创建文件
file = xlwt.Workbook()
#写入sheet名称,2017-05-01T06_00_00 格式
name_sheet=str_date[0:10]+'T'+str_date[-8:-6]+'_00_00'
table = file.add_sheet(name_sheet)

title=['deviceid','date','lon','lat','pm25']
#table.write(行_0开始, 列_0开始, 值)
#写入表头，第一行
for j in range(5):
table.write(0, j, title[j])
#index_i+1 行，index_j列
for index_i,r in enumerate(rs):
for index_j,val in enumerate(r):
if index_j== 1:

val1=str(datetime.datetime.strptime(str(val), "%Y-%m-%d %H:%M:%S") )
str1=val1[0:10]+'T'+val1[-8:]
table.write(index_i+1, index_j, str1)
# '2018-09-21T15:00:00'
else:
table.write(index_i+1, index_j, val)
#保存文件，2018-09-21T15_00_00.csv 名称格式
name_file=name_sheet+'.csv'
file.save(name_file)

except Exception as e:
print(e)
cursor.close()
conn.close()
return

cursor.close()
conn.commit()
conn.close()

if __name__ == '__main__':

do()

Python3操作SQL Server数据库(实例讲解)

https://www.jb51.net/article/126414.htm

1.xlwt

#输出数据

# for r in rs:

# print(len(r))

# for str in r:

# print(str)

# print(rs)

python Excel数据读取与写入

import xlwt

file = xlwt.Workbook()

table = file.add_sheet('sheet name')

for i in range(10):

table.write(i, 0, i)

file.save('xls_save.xls')

https://blog.csdn.net/qq_35451572/article/details/80427960

3.python for循环访问数组下标

http://outofmemory.cn/code-snippet/3741/accessing-the-index-in-python-for-loops

但是有时候我们会需要在便利数组的同时访问下标，这时候可以借助于enumerate函数来实现，例如：

l = [1,2,3]for index,val in enumerate(l):

print 'index is %d, val is %d' % (index,val)

#输出下标

# for index_i,r in enumerate(rs):

# print(index_i)

# for index_j,str in enumerate(r):

# print(index_j)

4.Python if 语句

http://www.runoob.com/python3/python3-if-example.html

以下实例通过使用 if...elif...else 语句判断数字是正数、负数或零：

实例(Python 3.0+)

num = float(input("输入一个数字: "))

if num > 0: print("正数")

elif num == 0: print("零")

else: print("负数")

日期格式转换及截取字符串

日期最终格式是

2018-09-21T15:00:00

【a】Python 日期格式转换

times = time.strftime("%H.%M", time.strptime(time_string, formats)) #将时间转为hh.mm类型

ftime = datetime.datetime.strptime(times, "%H.%M") #将times字符串转为%H.%M的datetime类型

datetime.datetime.strptime(str(val), "%Y-%m-%d %H:%M:%S")

【b】python中的字符数字之间的转换函数

https://www.cnblogs.com/wuxiangli/p/6046800.html

str(x ) 将对象 x 转换为字符串

【c】截取字符串

https://www.cnblogs.com/huangcong/archive/2011/08/29/2158268.html

str = ’0123456789′
print str[0:3] #截取第一位到第三位的字符
print str[:] #截取字符串的全部字符
print str[6:] #截取第七个字符到结尾
print str[:-3] #截取从头开始到倒数第三个字符之前
print str[2] #截取第三个字符
print str[-1] #截取倒数第一个字符
print str[::-1] #创造一个与原字符串顺序相反的字符串
print str[-3:-1] #截取倒数第三位与倒数第一位之前的字符
print str[-3:] #截取倒数第三位到结尾
print str[:-5:-3] #逆序截取，具体啥意思没搞明白？

【d】Python 字符串操作（string替换、删除、截取、复制、连接、比较、查找、包含、大小写转换、分割等）

https://www.cnblogs.com/exusll/p/6393621.html?utm_source=tuicool&utm_medium=referral

【5】 TypeError: 'datetime.datetime' object is not subscriptable

报错行： str1=val1[0:10]+'T'+val1[-8:]

for index_i,r in enumerate(rs):

for index_j,val in enumerate(r):

if index_j== 1:

val1=str(datetime.datetime.strptime(str(val), "%Y-%m-%d %H:%M:%S") )

str1=val1[0:10]+'T'+val1[-8:]

table.write(index_i+1, index_j, str1)

读取配置文件

from xml.dom.minidom import parse

【1】连接数据库

conn = pymssql.connect(host='.',

user='sa',

password='123456',

database='AirDB_CC',

charset='utf8')

改成

doc=parse('baseinfo.xml')

ip=login.getAttribute("ip")

user=login.getAttribute("user")

password=login.getAttribute("password")

database=login.getAttribute("database")

conn=pymssql.connect(host=ip,user=user,password=password,database=database)

【2】读取日期

timerange=doc.getElementsByTagName("timerange")[0]

start=timerange.getAttribute("start")

end=timerange.getAttribute("end")

【3】计算小时差

【a】

https://blog.csdn.net/u012062455/article/details/73287023/

secondsDiff=(dataTimea-dataTimeb).seconds

【b】

[Python3]显示当前时间、计算时间差以及时间加减法

https://blog.csdn.net/asher117/article/details/83012803

【c】

Python3基础知识之日期时间与字符的转换

http://www.cnblogs.com/johsan/p/9046406.html

【d】

python 日期格式和字符串格式的转化

https://www.cnblogs.com/he0xff/p/8479499.html

【e】

Python学习笔记 --- 循环遍历时间区间

https://blog.csdn.net/u012965373/article/details/78060533

start1 =datetime.datetime.strptime(start, '%Y-%m-%d %H:%M:%S')

end1 = datetime.datetime.strptime(end, '%Y-%m-%d %H:%M:%S')

print(int((end1-start1).seconds/3600))

【4】遍历小时

theHour=int((end1-start1).seconds/3600)+1

print(theHour)

for h in range(theHour):

monidate=(start1 +datetime.timedelta(hours=h)).strftime('%Y-%m-%d %H:%M:%S')

print(monidate)

输出：

2018-09-13 06:00:00

2018-09-13 07:00:00

2018-09-13 08:00:00

【5】try

(end1-start1).seconds跨越天数的情况

theHour=int((end1-start1).days*24 + (end1-start1).seconds/3600)+1

print(theHour)

日数据导出到csv

day = begin + datetime.timedelta(days=i)

T_MIC_DATAAIRDAY 日数据表

【1】time data '2018-06-01' does not match format '%Y-%m-%d %H:%M:%S'

monidate=(start1 + datetime.timedelta(days=h)).strftime('%Y-%m-%d %H:%M:%S')

改成

monidate=(start1 + datetime.timedelta(days=h)).strftime('%Y-%m-%d')

【2】time data '2018-06-01' does not match format '%Y-%m-%d %H:%M:%S'

str_date=str(datetime.datetime.strptime(str(monidate), "%Y-%m-%d %H:%M:%S") )

str_date=str_date[0:10]+'T'+str_date[-8:]

改成

str_date=str(monidate)[0:10]+'T'+'00:00:00'

【3】time data '2018-06-01' does not match format '%Y-%m-%d %H:%M:%S'