Kursinnhold
Introduction to Python(ihor)
Introduction to Python(ihor)
2. Variables and Types in Python
How to Store Numbers in PythonPython Naming Rules for VariablesHow to Work with Variables in PythonData Types in PythonChallenge: Converting Kilometers to MilesStore Text with Strings in PythonString Indexing in PythonString Slicing in PythonChallenge: Retrieving Letters from StringString Concatenation in Python
3. Conditional Statements in Python
Boolean Data Type in PythonChallenge: Working with Comparison OperatorsHow to Combine Conditions in PythonChallenge: Working with Logical OperatorsMembership Operators and Type Comparisons in PythonHow to Use if/else Expressions in PythonChallenge: Running a Grocery StoreChallenge: Creating Odd and Even Logicif/elif/else ExpressionsChallenge: Running Grocery Store ExtendedChallenge: Weather Adviser
4. Other Data Types in Python
Python ListsCommon List Methods in PythonChallenge: Updating ListNested Lists in PythonChallenge: Retrieving Information from Nested ListPython TuplesCommon Tuple Methods in PythonChallenge: Updating TupleNested Tuples in PythonChallenge: Retrieving Information from Nested TuplePython DictionariesChallenge: Creating DictionaryCommon Dictionary Methods in PythonChallenge: Updating Dictionary
6. Functions in Python
Built-in Functions in PythonChallenge: Converting HeightsHow to Create Functions in PythonChallenge: Writing First FunctionUse of if/else Statements in Python FunctionsChallenge: Identifying Positive Values Functions Without Return in PythonChallenge: Creating Logging FunctionModifying Functions in PythonChallenge: Updating Logic of the FunctionLambda Functions in PythonChallenge: Creating Lambda Function
Nested Lists in Python
Lists in Python can store different data types, including other lists. For example, when storing countries and their areas, it's more organized to use a separate list for each country instead of a single combined list.
# Two-dimensional list countries_2d = [["USA", 9629091], ["Canada", 9984670], ["Germany", 357114]] # Printing nested list print(countries_2d)
Each country has its own nested list within the main list. In a two-dimensional list, each element is itself a list, and we access inner items using indexing. For example, in a countries_2d list with three sublists, countries_2d[1] retrieves the second sublist (indexing starts at 0), and countries_2d[1][0] fetches the first item of that sublist.
# Two-dimensional list countries_2d = [['USA', 9629091], ['Canada', 9984670], ['Germany', 357114]] # Pull elements print(countries_2d[1]) print(countries_2d[1][0])
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Seksjon 4. Kapittel 4
