Everfighting

>>> import pickle
>>> f = open('somedata', 'wb')
>>> pickle.dump([1, 2, 3, 4], f)
>>> pickle.dump('hello', f)
>>> pickle.dump({'Apple', 'Pear', 'Banana'}, f)
>>> f.close()
>>> f = open('somedata', 'rb')
>>> pickle.load(f)
[1, 2, 3, 4]
>>> pickle.load(f)

Everfighting

from datetime import datetime
import xlwt


workbook = xlwt.Workbook()
worksheet = workbook.add_sheet('sheet1',cell_overwrite_ok=True)

jy_ts = datetime.strptime(jy_dt, '%Y-%m-%d')
FIXED_COLS = ('统计日期', '星期', '月份')
for i, val in enumerate(FIXED_COLS):

Everfighting

Python强类型：不同类型不能够进行运算。

>>> 3+6
9

>>> "3"+6
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: Can't convert 'int' object to str implicitly

Everfighting

python
>>> import django
>>> print(django.VERSION)

Everfighting

from faker import Factory

fake = Factory.create()
for i in range(100):
     c = CusQuestions(
         que_no = fake.text(max_nb_chars=90),
         loan_no = fake.text(max_nb_chars=90),
     )
     c.save()
     

Everfighting

exit(0)：无错误退出 exit(1)：有错误退出

Everfighting

import smtplib
from os.path import basename
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.utils import COMMASPACE, formatdate


def send_mail(send_from, send_to, subject, text, files=None,
              server="127.0.0.1"):

Everfighting

c.executemany(
      """INSERT INTO breakfast (name, spam, eggs, sausage, price)
      VALUES (%s, %s, %s, %s, %s)""",
      [
      ("Spam and Sausage Lover's Plate", 5, 1, 8, 7.95 ),
      ("Not So Much Spam Plate", 3, 2, 0, 3.95 ),
      ("Don't Wany ANY SPAM! Plate", 0, 4, 3, 5.95 )
      ] )

Everfighting

cur.execute(   ...     """INSERT INTO some_table (an_int, a_date, another_date, a_string)  ...        
VALUES (%(int)s, %(date)s, %(date)s, %(str)s);""",   ...     
{'int': 10, 'str': "O'Reilly", 'date': datetime.date(2005, 11, 18)})

Everfighting

request.FILES['filename'].name


If you don't know the key, you can iterate over the files:


for filename, file in request.FILES.iteritems():
    name = request.FILES[filename].name