Python 提取數據庫（Postgresql）並郵件發送
業務部門要求將將某一個數據庫中的表，定期發送到相關部門人員郵箱。
其實整個業務需求很簡單，實現起來也不難。
但是由於剛入門python，所以還是借鑒了不上網上的內容，也得到了許多群友的提醒。
業務部門使用的是Postgresql數據庫，所以使用 了psyconpg2的模塊。
整個腳本分為三部分：
1.數據庫的連接及數據寫入excel表中（整個對新手來說，應該是難點）
2.郵件的發送
3.生成excel文件的刪除
# coding: utf-8
import sys
import xlwt
import psycopg2
import datetime
import time
import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication
import os.path
# 連接數據庫的參數：主機，用戶，密碼，端口及數據庫名稱
host = '192.168.1.77'
user = 'postgres'
pwd = 'postgres'
port = 5432
db = 'pytest'
sheet_name = 'report' + time.strftime("%Y-%m-%d")
filename = 'report_' + time.strftime("%Y-%m-%d" + "-" + "%H%M%S") + '.xls'
out_path = "d:/test/report_" + time.strftime("%Y-%m-%d" + "-" + "%H%M%S") + ".xls" #
cur_path = 'd:/test'
print(out_path)
sql = 'select * from website;'
def export():
# 數據庫連接
conn = psycopg2.connect(dbname=db, user=user, password=pwd, host=host, port=port)
cursor = conn.cursor()
cursor.execute(sql)
result = cursor.fetchall()
count = cursor.rowcount
print("Select " + str(count) + " Records")
# cursor.scroll(0, mode='relative')
fields = cursor.description # 數據表的標題
workbook = xlwt.Workbook(encoding='utf-8') # 創建excel文檔
sheet = workbook.add_sheet(sheet_name, cell_overwrite_ok=True) # 根據sheet_name 創建excel文檔的sheet
for field in range(1, len(fields)): # 寫入數據表的文件頭
sheet.write(0, field, fields[field][0])
# 逐行逐列的添加數據
for row in range(1, len(result) + 1):
for col in range(0, len(fields)):
sheet.write(row, col, u'%s'%result[row-1][col])
workbook.save(out_path) # 按照out_path的格式和路徑保存excel表格
_user = "[email protected]"
_pwd = "123456."
areceiver = "[email protected]"
acc = "[email protected]"
# 如名字所示Multipart就是多個部分
msg = MIMEMultipart()
msg["Subject"] = u'[Data Select_' + time.strftime("%Y-%m-%d") + u']'
msg["From"] = _user
msg["To"] = areceiver
msg["Cc"] = acc
def send_email():
conn = psycopg2.connect(dbname=db, user=user, password=pwd, host=host, port=port)
cursor = conn.cursor()
cursor.execute(sql)
cursor.fetchall()
count = cursor.rowcount # summary rows number
# ----這是文字部分-----
content = '''Dear All, \n 附件是每日統計情況，請查收！
總計結果數位：''' + str(count)
part = MIMEText(content, 'plain', 'utf-8')
msg.attach(part)
if count > 0:
# 這是附件部分
# xls類型附件
file_name = 'd:/test/' + filename
part = MIMEText(open(file_name, 'rb').read(), 'base64', 'gb2312')
part["Content-Type"] = 'application/octet-stream'
basename = os.path.basename(file_name)
# part["Content-Disposition"] = 'attachment; filename=%s' % basename.encode('utf-8')
part['Content-Disposition'] = 'attachment; filename=%s' % basename
# part.add_header('Content-Disposition', 'attachment', filename=('utf-8', basename))
msg.attach(part)
s = smtplib.SMTP('mail.ucinbox.com', timeout=120) # 連接smtp郵件服務器
s.login(_user, _pwd)
s.sendmail(_user, areceiver.split(',') + acc.split(','), msg.as_string()) # send mail
print("Email send successfully")
s.close()
else:
print("nothing to send!")
# 刪除生成的excel文件
# 之前使用的是將不同的excel放入不同的文件夾，所以寫了遍歷刪除所有excel
def delete(path):
ls = os.listdir(cur_path)
for l in ls:
path_file = os.path.join(path,l) # 取文件路徑
if os.path.isfile(path_file):
os.remove(path_file)
else:
for f in os.listdir(path_file):
path_file2 = os.path.join(path_file,f)
if os.path.isfile(path_file2):
os.remove(path_file2)
# 調用函數
if __name__ == "__main__":
export()
send_email()
delete(cur_path)
Python 提取數據庫（Postgresql）並郵件發送