# 进行字符串分割 temp_list = [i.split(",") for i in df["Genre"]] # 获取电影的分类 genre_list = np.unique([i for j in temp_list for i in j]) # 增加新的列,创建全为0的dataframe temp_df = pd.DataFrame(np.zeros([df.shape[0],genre_list.shape[0]]),columns=genre_list) 2...
To get an optimized build of Python,configure --enable-optimizationsbefore you runmake. This sets the default make targets up to enable Profile Guided Optimization (PGO) and may be used to auto-enable Link Time Optimization (LTO) on some platforms. For more details, see the sections below. ...
p2=[Player2(2,'zs')for_inrange(100000)]snapshot=tracemalloc.take_snapshot()top_stats=snapshot.statistics('filename') 执行结果: G:/pythonlianxi/spython/logic/python高级/第二讲/demo1.py:0: size=7837 KiB, count=100003, average=80 B D:\python36\lib\tracemalloc.py:0: size=64 B, count...
图13-7. TomboList的UML 类图,list的真实子类和Tombola的虚拟子类。示例13-11. tombolist.py:类TomboList是Tombola的虚拟子类from random import randrange from tombola import Tombola @Tombola.register #① class TomboList(list): #② def pick(self): if self: #③ position = randrange(len(self)) retur...
defcalculate_andprint_stats(list_of_numbers): sum = sum(list_of_numbers) mean = statistics.mean(list_of_numbers) median = statistics.median(list_of_numbers) mode = statistics.mode(list_of_numbers) print('---Stats---') print('SUM: {}'.format(sum) print('MEAN: {}'.format(m...
The project was started in 2007 by David Cournapeau as a Google Summer of Code project, and since then many volunteers have contributed. See theAbout uspage for a list of core contributors. The project is currently maintained by a team of volunteers. ...
output_df = pd.DataFrame({'Values':[adft[0], adft[1], adft[4]['1%']],'Metric':['Test Statistics','p-value','critical value (1%)']})print('Statistics of {} sensor:\n'.format(sensor), output_df)print()if(adft[1] < 0.05) & (adft[0] < adft[4]['1%']):print('The...
xgbod.get_params() 代码语言:javascript 代码运行次数:0 运行 代码语言:javascript 代码运行次数:0 运行 AI代码解释 上下滑动查看更多{'base_score':0.5,'booster':'gbtree','colsample_bylevel':1,'colsample_bytree':1,'estimator_list':[KNN(algorithm='auto',contamination=0.1,leaf_size=30,method='large...
很显然,像 PyIntObject、PyStringObject 这些对象是绝不可能产生循环引用的,因为它们内部不可能持有对其他对象的引用。Python 中的循环引用总是发生在 container 对象之间(dict、list、class、interface 等)。那么就需要引入标记—清除这样的垃圾回收机制来辅助解决循环引用的问题。
# 明确易读的循环遍历 for index, value in enumerate(list_of_items): print(f"Item {index}: {value}") 通过以上章节的阐述,我们揭示了Python编程艺术的重要性,从实际需求出发,结合有趣的历史背景和设计哲学,展示了编码规范在提升代码质量、增进团队协作及接轨业界标准等方面的显著作用。接下来的文章将详细探讨...