Shulou(Shulou.com)06/02 Report--

This article will explain in detail how to explain the specific database management of Python. The content of the article is of high quality, so the editor will share it with you for reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

The Python specific database in Python allows Python programmers to easily create a complete, fully functional GUI user interface. This paper gives the Python specific database to manage the memory of the complete memory pool management program and test program source code for your reference!

Just like Python and wxWidgets, Python specific database is also an open source software and has excellent Russian cross-platform capabilities, which can run on 32-bit windows, most Unix or Unix-like systems, and Macintosh OS X.

Zipfile is used in python to do zip format coding compression and decompression, because it is a very common zip format, so the frequency of this module is also relatively high, here to make some records of the use of zipfile. It is convenient for yourself as well as for others. There are two very important class in zipfile.

They are ZipFile and ZipInfo, and in the vast majority of cases, we only need to use these two class. ZipFile is the main class that is used to create and read zip files while ZipInfo stores information about each file in the zip file. Z.infolist () is used here, which returns information about all the files in the package, which is a list of ZipInfo. A ZopInfo object contains information about a file in the archive.

Among them, filename, file_size and header_offset are commonly used, which are the file name, file size, and the offset of file data in the compressed package. In fact, the previous z.namelist () is the filename in the read ZopInfo, which is returned by a list. The way to extract a file from a compressed package is to use ZipFile's read method:

Import zipfile, os z = zipfile.ZipFile (filename,'w') # Note the second parameter here is w Filename here is the name of the compressed package # suppose you want to add all the files called testdir to the compressed package (here only add files in a subdirectory at one level): if os.path.isdir (testdir): for d in os.listdir (testdir): z.write (testdir+os.sep+d) # close () must be called! Z.close ()

Object-relational mapping tools help increase productivity by providing classes and objects for manipulating database tables. The object-relational mapping tool for Python-specific databases is SQLObject, an open source project that does almost everything you need to program a database. This article introduces SQLObject and its functions. After reading this article, you will be able to connect Python to the database without writing any SQL code.

When the object-oriented programming paradigm satisfies the relational paradigm of most databases, you will usually see object-relational mapping. Object-relational mapping is a bridge between the two worlds. It allows you to define classes that correspond to database tables. You can then use the methods on these classes and their instances to interact with the database without having to write SQL. Using object-relational mapping doesn't mean you don't need to know how relational databases work, but you don't need to write SQL to avoid programming errors.

You can find more than a dozen open source Python packages that operate on SQL databases, not including special-purpose modules for connecting to Python-specific databases. SQLObject is the module of *. It is an easy-to-use full object relational mapping package. SQLObject can do almost everything you need to program a database.

Shows how SQLObject interacts with databases, how to write database access and data validation code using SQLObject, and how to use it for legacy or existing databases.

On how to Python specific database management instructions to share here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.