投稿時間:2023-08-29 13:15:34 RSSフィード2023-08-29 13:00 分まとめ(21件)

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ROBOT	ロボスタ	国際的なロボコン「WRO2023」日本大会決勝にロボットプログラミング教室「ロボ団」から31チームが進出団」から31チームが進出！	https://robotstart.info/2023/08/29/wro-robodan.html		2023-08-29 03:05:50
IT	ITmedia 総合記事一覧	[ITmedia News] カシオ、30年前の「G-SHOCK FROGMAN」初号機をレストアするサービス、期間限定で提供	https://www.itmedia.co.jp/news/articles/2308/29/news123.html	gshockfrogman	2023-08-29 12:50:00
IT	ITmedia 総合記事一覧	[ITmedia News] メルカリで「iPhone 8」が売れている　価格は？	https://www.itmedia.co.jp/news/articles/2308/29/news119.html	iphone	2023-08-29 12:35:00
IT	ITmedia 総合記事一覧	[ITmedia PC USER] マウス、ビジネス向けデスクトップ「MousePro LP」にNVIDIA RTX4000 SFF Ada世代搭載モデルを追加	https://www.itmedia.co.jp/pcuser/articles/2308/29/news118.html	itmediapcuser	2023-08-29 12:22:00
IT	ITmedia 総合記事一覧	[ITmedia Mobile] メルカリで人気のスマホは「iPhone 8」、Androidは？　スマホアクセサリーは高騰傾向に	https://www.itmedia.co.jp/mobile/articles/2308/29/news117.html	android	2023-08-29 12:20:00
IT	ITmedia 総合記事一覧	[ITmedia News] ペットボトルのラベル剥がしを不要に　キリン、リサイクルできる直接印刷技術を開発	https://www.itmedia.co.jp/news/articles/2308/29/news116.html	itmedia	2023-08-29 12:20:00
AWS	AWS Japan Blog	Cox AutomotiveがAmazon Neptuneを活用したIDグラフでデジタルパーソナライゼーションを強化	https://aws.amazon.com/jp/blogs/news/cox-automotive-scales-digital-personalization-using-an-identity-graph-powered-by-amazon-neptune/	amazonneptune	2023-08-29 03:18:13
python	Pythonタグが付けられた新着投稿 - Qiita	Python, pandas.isnull() での True/False判定	https://qiita.com/sakaimo/items/1fc1033a8e36d902e800	pythonpandasisnull	2023-08-29 12:59:16
js	JavaScriptタグが付けられた新着投稿 - Qiita	ExpressのRouterについて	https://qiita.com/omo_taku/items/654d3fb04b5abb7b5e89	express	2023-08-29 12:19:47
Ruby	Rubyタグが付けられた新着投稿 - Qiita	Rspec【虎の巻】	https://qiita.com/iijima-naoya-45b/items/b4fe4e8b86db5618be6c	cobol	2023-08-29 12:40:59
AWS	AWSタグが付けられた新着投稿 - Qiita	AWS ECS – CodeDeploy での blue/greenデプロイ で テストリスナーポートの使い方は何なのか	https://qiita.com/YumaInaura/items/a5a08b86e77856448f31	awsecscodedeploy	2023-08-29 12:26:52
Ruby	Railsタグが付けられた新着投稿 - Qiita	Rspec【虎の巻】	https://qiita.com/iijima-naoya-45b/items/b4fe4e8b86db5618be6c	cobol	2023-08-29 12:40:59
海外TECH	DEV Community	An In-Depth Guide to Python Data Types	https://dev.to/scofieldidehen/an-in-depth-guide-to-python-data-types-2eaa	An In Depth Guide to Python Data TypesPython provides a rich set of built in data types that enable you to work with different kinds of data in your programs The core numeric types are integers floats and complex numbers Integers represent whole numbers which are useful for exact counts and computations Floats represent real numbers with decimal precision which is important for scientific and statistical calculations Complex numbers extend numbers to the complex plane and are used in many scientific domains Python has many built in data types that enable you to store and manipulate data in powerful ways Choosing the appropriate data type for your use case is important for writing optimized Python code This comprehensive guide will explore the various Python data types with code examples Numeric TypesNumeric data types in Python allow you to work with numeric data like integers floats and complex numbers Let s look at each of the numeric types in detail Integer int Integers are whole numbers like etc They can be positive negative or Integers are immutable in Python Some examples x    positive integery    negative integer print type x lt class int gt We can perform mathematical operations on integers like addition subtraction multiplication etc a b print a b  print a b print a b Integers can be converted to other data types like float complex etc num print type num lt class int gt  num float num print type num lt class float gt Floating Point float Floats represent real numbers like etc They contain a decimal point Useful for computations where precision is required Some examples a   b print type a lt class float gt Floats support math operations like addition subtraction etc x y  print x y print x y  print x y They can be converted to other types like int complex etc a print type a lt class float gt b int a  print type b lt class int gt ComplexComplex numbers are written as x yj where x is the real part and y is the imaginary part They are useful for scientific and mathematical applications x jprint type x lt class complex gt We can perform operations like addition and multiplication on complex numbers a jb jprint a b j print a b jThey can be converted to other types like int float etc x jprint type x lt class complex gt y float x print type y lt class float gt Boolean TypeBoolean represents logical values True and False Useful for conditional testing and logic For example x Truey Falseprint type x lt class bool gt Boolean operators like and or not can be used to compose logical expressions and conditions a Trueb Falseprint a and b False print a or b Trueprint not a FalseOther data types can be converted to booleans based on their truth value x print bool x True y print bool y FalseSequence TypesSequence types allow storing collections of data in an ordered way Let s go through them one by one String str Strings represent sequences of unicode characters like letters digits spaces etc They are immutable in Python Some examples of creating strings s Hello s World print type s lt class str gt We can access individual characters using indexing s python print s pprint s hStrings support operations like concatenation slicing length etc s Hello s World print s s Hello Worldprint len s Format specifiers like s can be used for formatting name John print My name is s name My name is JohnListLists are ordered collections of values that are mutable modifiable Allows for storing different data types nums  fruits apple mango banana print type nums lt class list gt We can access elements using index Lists are mutable nums  print nums Lists support operations like concatenation slicing length etc fruits apple banana mango print len fruits print fruits banana mango TupleTuples are ordered collections of values that are immutable cannot be modified Allows storing different data types point parenthesis not required but recommendedcolors red blue green print type point lt class tuple gt We can access elements using an index but cannot modify tuples point ERROR cannot modify tupleTuples support operations like concatenation slicing length etc colors red blue green  print len colors print colors blue green RangeA range represents an immutable sequence of numbers It is commonly used to loop over sequences of numbers nums range to  print list nums Ranges are often used in for loops  for i in range   print i Output   We can also create ranges with a start stop and step size nums range  print list nums Set TypesSets are unordered collections of unique values They support operations like membership testing set math etc SetSets contain unique values only Elements can be added and removed colors red blue green print type colors lt class set gt Set elements can be tested for membership and added removed Sets are mutable red in colors Truecolors add yellow colors remove blue Set math operations like union intersection work between sets set set print set set print set amp set FrozensetFrozenset is an immutable variant of a Python set Elements cannot be added or removed colors frozenset red blue green print type colors lt class frozenset gt  colors add yellow AttributeErrorfrozensets can be used as dictionary keys and in set operations Mapping TypeMapping types allow storing data as key value pairs Dictionaries are the main mapping type in Python DictionaryDictionaries consist of key value pairs and are enclosed in curly braces Useful for storing related data student   name John   age    courses Math Science print type student lt class dict gt Dictionary elements can be accessed via keys and modified Dictionaries are mutable student name Mark update valueprint student courses Math Science Common dict operations include length adding removing keys iteration etc print len student  student email john example com add key valuefor key in student   print key student key print each itemBinary TypesBinary types in Python are used when working with binary data like bytes byte arrays etc BytesBytes represent immutable sequences of bytes Example data b hello  print type data lt class bytes gt Bytes support operations like indexing length concatenation etc but are immutable print data print len data data data b world cannot modify only concatenateBytearrayBytearray represents mutable sequences of bytes They can be modified in place data bytearray b hello print type data lt class bytearray gt  data mutableBytearray supports typical sequence operations like indexing concatenation etc print data  data data bytearray b world MemoryviewMemoryview objects allow accessing the internal data of objects that support the buffer protocol directly without copying Useful for advanced optimizations data memoryview b hello print data Memoryview supports slicing and editing without copying the buffer Advanced usage for performance data b i edit in placeprint data b hiello None TypeThe None type represents the absence of a value It is similar to null in other languages x None print type x lt class NoneType gt None is commonly used as a placeholder for optional or missing values def print if not none x   if x is None     print x is None   else     print x The operator can check if something is None x Noneprint x is None TrueSo in summary Python comes equipped with a diverse set of built in data types numeric textual collections mappings and more Choosing the appropriate data type leads to efficient memory usage and better performance Manipulating data types form an integral part of Python programming I hope this overview gave you a good understanding of the different data types available in Python along with plenty of code examples demonstrating their usage If you find this post exciting find more exciting posts on Learnhub Blog we write everything tech from Cloud computing to Frontend Dev  Cybersecurity  AI and Blockchain Resource Essential Python Extensions for 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金融	JPX マーケットニュース	[東証]新規上場日の初値決定前の気配運用について：（株）インバウンドプラットフォーム	https://www.jpx.co.jp/news/1031/20230829-01.html	新規上場	2023-08-29 13:00:00
金融	ニュース - 保険市場TIMES	日本損保協会、BS日テレでミニ番組を放送	https://www.hokende.com/news/blog/entry/2023/08/29/130000		2023-08-29 13:00:00
ニュース	BBC News - Home	Jesus Green Lido: Cambridge 'people's pool' turns 100	https://www.bbc.co.uk/news/uk-england-cambridgeshire-66170456?at_medium=RSS&at_campaign=KARANGA	cambridge	2023-08-29 03:42:04
ビジネス	東洋経済オンライン	中国自動車市場で｢地場メーカーのPHV｣が大躍進 EVとPHVの合計では､BYDがテスラを追い抜く | 大解剖 中国｢EV覇権｣ | 東洋経済オンライン	https://toyokeizai.net/articles/-/695653?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2023-08-29 13:00:00
マーケティング	MarkeZine	【耳から学ぶ】最も顧客満足度の高い“経済圏”は...？【ニュースランキング】	http://markezine.jp/article/detail/43277	顧客満足度	2023-08-29 12:30:00
マーケティング	MarkeZine	最先端のトレンドに学ぶ！顧客の心を掴む、ブランデッドコンテンツの作り方【視聴無料】	http://markezine.jp/article/detail/43279	心を掴む	2023-08-29 12:15:00
IT	週刊アスキー	セブンイレブン「名店グルメの祭典」開催中！　和・洋・中の監修商品が揃う	https://weekly.ascii.jp/elem/000/004/152/4152659/	勢ぞろい	2023-08-29 12:50:00
IT	週刊アスキー	レノボ、AMDプロセッサーを搭載したThinkPad Pシリーズを3機種を発表	https://weekly.ascii.jp/elem/000/004/152/4152635/	thinkpad	2023-08-29 12:30:00