正则表达式解析存储在mysql中

Question

我正在编码以从文本文件中查找名称和爱好并将其存储在详细信息（mysql 表）中。详细信息表由“名称”和“爱好”组成。我无法存储到我的数据库中。

import MySQLdb
import re
db = MySQLdb.connect(host="localhost", # your host, usually localhost
                     user="root", # your username
                      passwd="mysql", # your password
                      db="sakila") # name of the data base
cursor = db.cursor()
with open('qwer2.txt','r') as file:
    for line in file:


        patterns = [
         a,b= re.compile('My name is (\w+) and my hobby is (\w+)\.', re.IGNORECASE),
         a,b= re.compile('Me (\w+) and my interest is (\w+)\.', re.IGNORECASE),
        ]

        match_result = patterns[0].match(line) or patterns[1].match(line)
        name, hobby = match_result.groups()             
        cursor.execute('''INSERT into Details (Names, Hobby)
                          values (? , ?)'''%(a,b)

我的文本文件是一个段落：

My Name is Casssandra and my Hobby is Cooking.
My name is Archana and my hobby is Playing.Me Adarsh and my interest is Programming.
Me Leela and my interest is Baking.My name is John and my interest is Gaming.

输出：

Names      |  Hobby

Cassandra   Cooking  
Archana     Playing
Adarsh      Programming
Leela       Baking
John        Gaming

请帮我纠正我的程序以存储到表中。

Answer 1

您将 SQL 参数与字符串格式混合在一起，这是行不通的。将参数作为 单独的 参数传入：

cursor.execute('''INSERT into Details (Names, Hobby)
                  values (%s, %s)''', (name, hobby))
db.commit()

在使用 MySQLdb 数据库适配器时，需要使用%s 作为占位符，并且还需要提交事务。

您的patterns 设置不是有效的 Python；如果你想匹配多个模式，那就把它做成一个合适的列表：

patterns = (
    re.compile('My name is (\w+) and my hobby is (\w+)\.', re.IGNORECASE),
    re.compile('Me (\w+) and my interest is (\w+)\.', re.IGNORECASE),
)

然后循环遍历这些模式直到匹配到一个：

for pattern in patterns:
     match_result = pattern.match(line)
     if match_result:
         name, hobby = match_result.groups()

演示：

>>> import re
>>> patterns = (
...     re.compile('My name is (\w+) and my hobby is (\w+)\.', re.IGNORECASE),
...     re.compile('Me (\w+) and my interest is (\w+)\.', re.IGNORECASE),
... )
>>> lines = '''\
... My Name is Casssandra and my Hobby is Cooking.
... My name is Archana and my hobby is Playing.Me Adarsh and my interest is Programming.
... Me Leela and my interest is Baking.My name is John and my interest is Gaming.
... '''.splitlines()
>>> for line in lines:
...     for pattern in patterns:
...         match_result = pattern.match(line)
...         if match_result:
...             name, hobby = match_result.groups()
...             print(name, hobby)
... 
('Casssandra', 'Cooking')
('Archana', 'Playing')
('Leela', 'Baking')

所有放在一起就变成了：

import MySQLdb
import re

patterns = (
    re.compile('My name is (\w+) and my hobby is (\w+)\.', re.IGNORECASE),
    re.compile('Me (\w+) and my interest is (\w+)\.', re.IGNORECASE),
)
db = MySQLdb.connect(host="localhost", # your host, usually localhost
                     user="root", # your username
                      passwd="mysql", # your password
                      db="sakila") # name of the data base

with open('qwer2.txt','r') as file, db as cursor:
    for line in file:
        for pattern in patterns:
             match_result = pattern.match(line)
             if match_result:
                 name, hobby = match_result.groups()
                 cursor.execute(
                     '''INSERT INTO Details (Names, Hobby)
                        VALUES (%s, %s)''',
                     (name, hobby))
                 break

这也将数据库连接用作上下文管理器（它为您提供一个游标），当with 块完成且没有错误时，它会自动提交更改。

Answer 2

从索引 2 和 4 中获取匹配组。

/(?:(My Name is|Me) )(.*?) and (?:my (Hobby|interest) is )([^\\.]*)./i

Online demo

示例代码：

import re
p = re.compile(ur'(?:(My Name is|Me) )(.*?) and (?:my (Hobby|interest) is )([^\\.]*).', re.IGNORECASE)
test_str = u"..."

re.findall(p, test_str)

Answer 3

您已经正确定义了游标，您唯一需要做的就是执行 SQL 语句，您可以通过在游标对象上调用 execute 来完成。另外，我建议您查看 MySQLDB 文档。