# -*- coding: utf-8 -*-importfunctoolstry:fromcollections.abcimportMutableMappingexceptImportError:fromcollectionsimportMutableMappingclassDispatcher(MutableMapping):""" Dictionary like object which maps method_name to method."""def__init__(self,prototype=None):""" Build method dispatcher. Parameters ...
state: typing.Optional[ Literal["attached","detached","hidden","visible"] ]=None )->None:"""Locator.wait_for Returns when element specified by locator satisfies the `state` option. If target element already satisfies the condition, the method returns immediately. Otherwise, waits for up to `...
(OperationalError, InternalError) is not adequate ping: an optional flag controlling when connections are checked with the ping() method if such a method is available (0 = None = never, 1 = default = whenever fetched from the pool, 2 = when a cursor is created, 4 = when a query is ...
The python string startswith() method accepts the following parameters:prefix is a string or a tuple of strings to search for. The prefix parameter is mandatory. start is the position that the method starts looking for the prefix. The start parameter is optional. end is ...
| | fit(self, X, y=None) | Do nothing and return the estimator unchanged | | This method is just there to implement the usual API and hence | work in pipelines. | | Parameters | --- | X : array-like | | transform(self, X, copy=None) | Binarize each element of X | | Para...
tree_method(字符串)–指定要使用的树方法。默认为自动。如果将此参数设置为默认值,则XGBoost将选择最保守的选项。建议从参数文档中研究此选项,也可以上一篇文章查找。 n_jobs(int)–用于运行xgboost的并行线程数。与网格搜索等其他Scikit-Learn算法结合使用时,您可以选择哪种算法可以并行化和平衡线程。创建线程争用将...
Now you know how to add parameters to decorators, so you can rewrite @slow_down using an optional rate argument that controls how long it sleeps: Python decorators.py import functools import time # ... def slow_down(_func=None, *, rate=1): """Sleep given amount of seconds before ...
While all operations in Tkinter are implemented as method calls on widget objects, you've seen that many Tcl/Tk operations appear as commands that take a widget pathname as its first parameter, followed by optional parameters, e.g. destroy . grid .frm.btn -column 0 -row 0 Others, howeve...
The Python language provides functions as a method to bundle related lines of code that complete particular assignments. Functions allow us to conserve programming code from duplication by storing it as reusable blocks for later use. When working on a large program, breaking it into smaller function...
Refers to the parameter passing method when calling a function, and has nothing to do with the function definition. Through key parameters, you can pass values by parameter name, clearly specify which value is passed to which parameter, and the order of actual parameters can be inconsistent with...