Search for tag: "int"

15 Media

07:20 Lesson 24.2 The isinstance Function Lesson 24.2 The isinstance Function	Lesson 24.2 The isinstance Function In this video, we show that we can solve the problem of strict typing by using the isinstance function. This function will be our preferred way for enforcing preconditions going forward. instance employee fraction function subclass executive class object fractions int types preconditions definition string module expression classes python power statement From Hannah Lee 66 plays
05:52 Lesson 24.1 Strict Typing Lesson 24.1 Strict Typing	Lesson 24.1 Strict Typing Whenever we have enforced preconditions, we have always used the type function. In this video we show why that is a problem, particularly when we want to use an object argument that is a subclass of… fraction operations int typing denominator thing multiplication problem class preconditions series subclasses error fractions subclass definition lot assertion power sense From Hannah Lee 57 plays
08:19 Lesson 23.5 Mixed-Type Operators Lesson 23.5 Mixed-Type Operators	Lesson 23.5 Mixed-Type Operators Operator overloading allows us to redefine the meaning of + or * on objects of our class. But sometimes we want to mix together types like a fraction and integer. In this video we show that it is… fraction fractions times multiplication method underscore int thing helper methods star left operation precondition integer definition expression p. multiply sense From Hannah Lee 68 plays
05:32 Lesson 16.2 For-Loop Design Lesson 16.2 For-Loop Design	Lesson 16.2 For-Loop Design In this video we show how to use for-loops in function definitions. In particular, we show that we go from a specification to code that uses a for-loop. loop result element answer function integers int body variable 4x alright pseudocode word practice statement lot integer values ints accumulator From Hannah Lee 85 plays
06:23 Lesson 15.2 Complex Tuple Expressions Lesson 15.2 Complex Tuple Expressions	Lesson 15.2 Complex Tuple Expressions Tuples are very, very similar to strings. In this video we explore this similarity, showing that they support many of the same operations and methods. tuple strings tuples string boxes thing math types differences times function element operations python expressions values expression iterable int things From Hannah Lee 56 plays
05:38 Lesson 12.4 Functions in Memory Lesson 12.4 Functions in Memory	Lesson 12.4 Functions in Memory We know what happens when we call a function. But as we show in this video, Python also does something very important when we define a function. It has to store the definition somewhere. function folder module definition math variable call centigrade python command space cosine import front dot parentheses frames arguments thing int From Hannah Lee 69 plays
06:53 Lesson 12.1 Objects Everywhere Lesson 12.1 Objects Everywhere	Lesson 12.1 Objects Everywhere The biggest lie that we have told is that there is a difference between classes and the basic types. In this video we show that this is not true, and what ramifications this has for Python. folder python string int objects object types folders abc boolean float function method things series error class thing box constructor From Hannah Lee 85 plays
03:38 Lesson 11.4 Object Representation Lesson 11.4 Object Representation	Lesson 11.4 Object Representation We have said that objects are essentially folders? But the command line cannot display these folders using text. In this video, we talk about what the command line does show when we look at an object… representation string object types expression shell brackets angle function thing objects things python int summary series quotes wrapper return anytime From Hannah Lee 95 plays
03:47 Lesson 11.1 Objects and Classes Lesson 11.1 Objects and Classes	Lesson 11.1 Objects and Classes In this video we have to introduce some new terminology. We talk about classes, which are new types that are provided by modules (and therefore not built into Python). Objects are the values for… class modules python functions types series parameters point function points values objects classes computer object cases specification distance int videos From Hannah Lee 125 plays
04:39 Lesson 4.6 Interactive Scripts Lesson 4.6 Interactive Scripts	Lesson 4.6 Interactive Scripts Right now, we do not know a lot of Python commands, and so our scripts are pretty boring. But we can make them a lot more interesting with a function that we have already seen: the input function. In… string input script function tutor x. assignment int calculations statement result command expression types prompt statements scripts print practice y. From Hannah Lee 88 plays
05:53 Lesson 3.1 Built-In Functions Lesson 3.1 Built-In Functions	Lesson 3.1 Built-In Functions The easiest functions to use in Python are those that are built into it. They are listed on the Python Documentation page. In this video we examine some of these and show the syntax for how to use… function parentheses call functions expression python float int word arguments argument integer calls quit return expressions math webpage documentation answer From Hannah Lee 129 plays
03:41 Lesson 2.4 Dynamic Typing Lesson 2.4 Dynamic Typing	Lesson 2.4 Dynamic Typing If you have programmed before (and it is okay if you have not), you may be used to variables having the restriction that they can only contain specific types. This is not the case in Python, and that… word expression string variables float class things values variable python thing programs numbers error fact languages int mind types language From Hannah Lee 102 plays
02:27 Lesson 2.1 Notion of a Variable Lesson 2.1 Notion of a Variable	Lesson 2.1 Notion of a Variable Variables are tricky things because they are often invisible. To better understand them, we need to build a mental model of how they work. That is the purpose of this video. python box variables boxes things thing values float memory expressions variable concept restrictions java languages int notice tool locations x. From Hannah Lee 122 plays
04:33 Lesson 1.7 Mixed Expressions Lesson 1.7 Mixed Expressions	Lesson 1.7 Mixed Expressions For the most part, operations are used to combine two expressions of the same type. Adding together two ints is different from adding together two strings. In this video we see what happens when we… int python string float floats error integer types answer parentheses ent boolean expression quotes conversion reverse hand thing tool warning From Hannah Lee 148 plays
04:55 Lesson 1.3. Float Expressions Lesson 1.3. Float Expressions	Lesson 1.3. Float Expressions Integers are not the only number type in Python. There is also the float type, which is the set of real numbers. Floats can do just about everything that integers So why then does Python need a… floats answer decimals numbers slash python representation notation float int digits errors standard error calculators calculator thing remainder ints division From Hannah Lee 148 plays