Python Snippet

scvmm

　　# everything is an object

    import re  
def build_match_and_apply_functions(pattern, search, replace):  
def matches_rule(word):  
return re.search(pattern, word)  
def apply_rule(word):  
return re.sub(search, replace, word)  
return (matches_rule, apply_rule)  
patterns = \  
(  
('[sxz]$', '$',  'es'),  
('[^aeioudgkprt]h$', '$', 'es'),  
('(qu|[^aeiou])y$', 'y$', 'ies'),  
('$', '$',  's')  
)  
rules = [build_match_and_apply_functions(pattern, search, replace)  
for (pattern, search, replace) in patterns]  
def plural(noun):  
for matches_rule, apply_rule in rules:  
if matches_rule(noun):  
return apply_rule(noun)  
　　# AOP

>>> class interceptor:
...         def __enter__(self):
...             print('enter...')
...         def __exit__(self, *args):
...             print('exit...')
...
>>> def say():
...         print('hello world!')
...
>>> with interceptor() as i:
...         say()
...
enter...
hello world!
exit...

>>> def interceptor(func):
...     def wrapper(*args, **kwargs):
...             print('enter...')
...             return func(*args, **kwargs)
...     return wrapper
...
>>>
>>> @interceptor
... def say():
...     print('hello world!')
...
>>>
>>> say()
enter...
hello world!
　　# no switch

>>> def do_a():
...     print('do_a')
...
>>> def do_b():
...     print('do_b')
...
>>> switchDict = {
...     'a': do_a,
...     'b': do_b
... }
>>> cases = ['a', 'b']
>>> for c in cases:
...     switchDict[c]()
...
do_a
do_b
　　# Generator

>>> def fib():  
a, b = 0, 1  
while True:  
yield a
a, b = b, a+b  
>>> f = fib()  
>>> f  
<generator object fib at 0x01224A30>  
>>> print f.next()  
0  
>>> print f.next()  
1  
>>> print [f.next() for i in range(5)]  
[1, 2, 3, 5, 8]
　　# email

import smtplib
from email.mime.text import MIMEText  
from email.mime.multipart import MIMEMultipart  
from email.mime.image import MIMEImage
mail_host = 'smtp.163.com'
mail_user = 'xxx'
mail_pswd = 'xxx'
mail_postfix = '163.com'
me = mail_user + '<' + mail_user + '@' + mail_postfix + '>'
mailto = ['xxx@xxx.com']
def send_mail():
msgRoot = MIMEMultipart('related')
msgRoot['Subject'] = 'test'
msgRoot['From'] = me
msgRoot['To'] = ';'.join(mailto)
text = ('<b>Some <i>HTML</i> text</b> and an image.'
'<br><img src="cid:image1"><br>')
msgText = MIMEText(text, 'html', 'utf-8')
imagePath = 'xxx.jpg'
with open(imagePath, 'rb') as fp:
msgImage = MIMEImage(fp.read())
msgImage.add_header('Content-ID', '<image1>')
msgRoot.attach(msgText)
msgRoot.attach(msgImage)
try:
s = smtplib.SMTP()
s.connect(mail_host)
s.login(mail_user, mail_pswd)
s.sendmail(me, mailto, msgRoot.as_string())
s.close()
return True
except Exception as e:
print str(e)
return False
if __name__ == '__main__':
if send_mail():
print 'success!'
else:
print 'fail!'
　　# MySQLdb

from MySQLdb import *
host = 'xxx.xxx.xxx.xxx'
user = 'xxx'
pswd = 'xxx'
db = 'xxx'
with connect(host, user,pswd, db) as cur:
cur.execute('SELECT version()')
print 'version: %s' %cur.fetchone()
　　# dis
　　# pip
　　# pexpect


　　# pssh