subject 是带有 type 和 shape 的,就是说 subject 是带有结构的,事先声明好 pattern 的结构。例如 subject 可以是一个 list、 tuple、 class、 list of class 等等。 具体例子: tuple: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 # point 是一个 (x, y) tuple match point: case (0, 0): ...
subject 是带有 type 和 shape 的,就是说 subject 是带有结构的,事先声明好 pattern 的结构。例如 subject 可以是一个 list、 tuple、 class、 list of class 等等。 具体例子: tuple: # point 是一个 (x, y) tuple match point: case (0, 0): print("Origin") case (0, y): print(f"Y={y}...
1def_images(self):2''' Return a listoffile-namesofall3supported imagesinself._dirpath.'''45# Startwithan empty list6images=[]78# Find the matching filesforeach valid9# extension and add them to the images list.10forextensioninsupported_image_extensions():11pattern=os.path.join(self._di...
In fact, you’ll find that.iterdir()is generally more efficient than the glob methods if you need to filter on anything more complex than can be achieved with a glob pattern. However, if all you need to do is to get a list of all the.txtfiles recursively, then the glob methods will...
结构模式匹配 (Structural Pattern Matching)是 Python 3.10中引入的一个新特性,它提供了一种便利的方式来对数据结构进行匹配和提取其中的内容。这个特性类似于其他语言中的模式匹配功能,可以帮助开发者更清晰、更简洁地处理复杂的数据结构。 1) 字典示例
|列表| 列表由任何类型的值/变量组成。列表用方括号括起来,用单引号将字符串值括起来 | jolly_list = [ 1,2,3,4,5 ]happy_list = [ 'Hello ',123,' Orange' ] | |元组| 与列表不同,元组是只读的,不能动态更新。元组用括号括起来 | 体面元组= ( 1,2,3)amazing_tuple = ( 1.12,“Ok”,456....
Even though the glob API is very simple, the module packs a lot of power. It is useful in any situation where your program needs to look for a list of files on the filesystem with names matching a pattern. If you need a list of filenames that all have a certain extension, prefix,...
sys模块有一个argv变量,用list存储了命令行的所有参数。argv至少有一个元素,因为第一个参数永远是该.py文件的名称,例如: 运行python3 hello.py获得的sys.argv就是['hello.py']; 先解释什么是命令行参数。 $ Python --version Python2.7.6 这里的--version就是命令行参数。如果你使用Python --help可以看到更多...
(e.g. via builtin ``open`` function)or ``StringIO``.sheet_name : str, int, list, or None, default 0Strings are used for sheet names. Integers are used in zero-indexedsheet positions. Lists of strings/integers are used to requestmultiple sheets. Specify None to get all sheets....
atan(x)Returns the arc tangent of x, in radians. atan2(y, x)Returns atan(y / x), in radians. ceil(x)The ceiling of x. choice(seq)A random item from a list, tuple, or string. cmp(x, y)-1 if x < y, 0 if x == y, or 1 if x > y ...