python笔记

最近由于工作需要写了点python小程序，觉得有必要做一点笔记

一。使用pymssql

1.引入pymssql包

import pymssql

2.建立连接：

conn = pymssql.connect(server=conf['db_address'],
port="1433",user=conf['db_username'],
password=conf['db_password'],
database=conf['db_name'],

charset="UTF-8")
cursor = conn.cursor()

3.执行SQL语句：

cursor.execute(sql)

4.获得数据：
search_table = cursor.fetchall()

5.修改数据：

cursor.execute(sql,(str(datetime.today()),))

conn.commit()

二。定义一个python的类

#tool class to write data into file
class OutFile:
    dir_ = ''
    sew_ = '=='
    def __init__(self, dir, sew = '=='):
        self.dir_ = dir
        self.sew_ = sew
    def write_line(self, line, date):
        fp = open(self.dir_ + "/" + date, 'ab')
        print line
        fp.write(line)
        
        fp.write('\n')
        fp.close()
    def write_vector(self, vec, date):
        fp = open(self.dir_ + "/" + date, 'ab')
        if len(vec) > 0:
            for i in range(0, len(vec) - 1):
                fp.write(vec[i])
                fp.write(self.sew_)
            fp.write(vec[len(vec) - 1])
            fp.write('\n')
        fp.close()
    def write_dict(self, dict, date):
        fp = open(self.dir_ + "/" + date, 'ab')
        for key in dict:
            fp.write(key)
            fp.write(' : ')
            leng = len(dict[key])
            for i in range(0, leng - 1):
                fp.write(dict[key][i])
                fp.write(self.sew_)
            fp.write(dict[key][leng - 1])
            fp.write('\n')
        fp.close()
    def write_dict_dict(self, dict_dict, date):
        fp = open(self.dir_ + "/" + date, 'ab')
        for key in dict_dict:
            fp.write(key.encode('latin-1'))
            print key.encode('latin-1')
            #fp.write(key.decode('utf-8').encode('gbk'))
            dict = dict_dict[key]
            fp.write(self.sew_)
            for key_word in dict:
                #fp.write(key_word.decode('utf-8').encode('gb2312'))
                fp.write(key_word.encode('latin-1'))
                #fp.write(key_word.decode('utf-8').encode('gbk'))
                fp.write(':')
                fp.write(str(dict[key_word]))
                fp.write(self.sew_)
            fp.write('\n')
        fp.close()
        
outfile = OutFile('report', '	')