/usr/bin/env Python#coding=utf-8__metaclass__= type#新式类classPerson:#创建类def__init__(self, name):#构造函数self.name =namedefgetName(self):#类中的方法(函数)returnself.namedefcolor(self, color):print"%s is %s"%(self.name, color) girl= Person('wangguniang')#实例化name = girl....
python sqlite操作 1、sqlite 中指令操作 删除db中某一个table: delete from column_data where table_name="table1"or table_name= "table2" 2、对一个table重命名 coon.execute("ALTER TABLE tablename1 RENAME TO tablename2") 3、选取其中的元素 cursor = c.execute("SELECT id from tablename")//选...
Learn how to build a robust blockchain from scratch using Python. Explore blockchain fundamentals, consensus algorithms, and smart contracts through this blog.
Create a serverless application to manage photos Create a table with global secondary index Create a table with warm throughput enabled Create a web application to track DynamoDB data Create a websocket chat application Create an item with a TTL Delete data using PartiQL DELETE Detect...
Now you can extract text and crop or rotate pages to your heart’s content!Checking Your Understanding Now it’s time to check your understanding. Go ahead and expand the block below: Exercise: Encrypt a PDFShow/Hide You can expand the block below to see a solution: Solution: Encrypt a...
The parser is the heart of the compiler, and it comes in many shapes and sizes. The Good for Nothing parser has a number of jobs: it ensures that the source program conforms to the language definition, and it handles error output if there is a failure. It a...
This would be a similar setup if you were also wanting to collect other data to a file, such as when a proximity sensor is entered, or when a user’s heart rate goes past a certain threshold if using a physiological sensor. The function is then being called with the “GRAB_EVENT”...
Check outHow to Master Python Tkinter Events? 3. Add a Text Widget The heart of our text editor is the text widget. Tkinter provides theTextwidget, which allows users to enter and edit multi-line text. Let’s add a text widget to our main window: ...
PySimpleGUI is currently capable of running on 4 Python GUI Frameworks. The framework to use is specified using the import statement. Change the import and you'll change the underlying GUI framework. For some programs, no other changes are needed than the import statement to run on a differen...
The pyzipper.AESZipFile() creates a new ZIP file with AES encryption, LZMA compression, and a user-provided password, ensuring the file is password-protected. It’s safe to say that this is the heart of this code. Now, let’s run our code from our terminal: $ python zip_file_locker...