Therefore, the Python community has adopted the naming convention of using uppercase letters to communicate that a given variable is really a constant. So, in Python, you don’t have constants. Rather, you have variables that never change. This can be an issue if you’re working on a ...
/usr/bin/env python # -*- coding: utf-8 -*- """ 文档 module docstring """ # 引用 imports # 常量 constants # 异常 exception classes # 方法 interface functions # 类 classes # 内部方法和类 internal functions & classes def main(...): ... if __name__ == '__main__': status =...
So we talked about constants. We've talked about reserved words. We're talking about variables. And so here we have a sentence like we've already done some of these things where we set x equals 2. We retrieve the old value backs and add two to it so that becomes 4 and then we pr...
"""function that will create borders in each row and column positions """ def show_grid(screen_Surface, grid): """ --- following two variables will show from where to draw lines--- """ side_x = top_left_x side_y = top_left_y for eachRow in range(grid): pygame.draw.line(scr...
These are the course-wide materials as well as the first part of Chapter One where we explore what it means to write programs. We finished Chapter One and had the quiz and first assignment in the third week of the class. Throughout the course, you may want to come back and look at ...
Module constants Y - Connection – The connection object query – execute a SQL command string Y - send_query - executes a SQL command string asynchronously Y - query_prepared – execute a prepared statement Y - prepare – create a prepared statement Y - describe_prepared – describe a prepar...
In the example, (not None) evaluates to True since the value None is False in a boolean context, so the expression becomes 'something' is True.▶ A tic-tac-toe where X wins in the first attempt!# Let's initialize a row row = [""] * 3 #row i['', '', ''] # Let's make...
And in this case, Python returns a new tuple to me where the two tuples have been put together. 因为元组是序列,所以访问元组中不同对象的方式取决于它们的位置。 Because tuples are sequences, the way you access different objects within a tuple is by their position. 因此,如果我想访问元组中的...
Imports are always put at the top of the file, just after any module comments and docstrings, and before module globals and constants(位置在文件的顶部,就在任何模块注释和文档字符串之后,模块全局变量和常量之前) Absolute imports are recommended, as they are usually more readable and tend to be be...
HEAD = 1; TAIL = 2 # constants xmax = sqrt(ns); xmin = -xmax # extent of plot axis for step in range(ns): for p in range(np): coin = random_.randint(1,2) # flip coin if coin == HEAD: positions[p] += 1 # step to the right ...