Podcast
Questions and Answers
What are methods in Python primarily used for?
What are methods in Python primarily used for?
- To define global variables
- To compile code into executable format
- To create new data types
- To apply specific routines to objects (correct)
Which of the following built-in functions is used to convert a number into a binary string?
Which of the following built-in functions is used to convert a number into a binary string?
- bin() (correct)
- format()
- hex()
- oct()
Which built-in function would you use to check if a specific attribute exists in an object?
Which built-in function would you use to check if a specific attribute exists in an object?
- dir()
- type()
- hasattr() (correct)
- getattr()
What does the exec() function do in Python?
What does the exec() function do in Python?
Which of the following functions is used to create a memory view object in Python?
Which of the following functions is used to create a memory view object in Python?
What is the purpose of the dir() function?
What is the purpose of the dir() function?
Which built-in method is utilized to return the maximum item in an iterable?
Which built-in method is utilized to return the maximum item in an iterable?
What is the primary function of the round() method?
What is the primary function of the round() method?
What is a tuple primarily defined as?
What is a tuple primarily defined as?
What happens when you attempt to change an element within a tuple?
What happens when you attempt to change an element within a tuple?
How do you access the second item in a tuple named 'vehicles'?
How do you access the second item in a tuple named 'vehicles'?
Given the tuple fruits = ('Apple', 'Orange', 'Banana'), what would be the result of fruits[1:3]?
Given the tuple fruits = ('Apple', 'Orange', 'Banana'), what would be the result of fruits[1:3]?
What does the command fruits[-1] return when using the tuple fruits = ('Apple', 'Orange', 'Banana')?
What does the command fruits[-1] return when using the tuple fruits = ('Apple', 'Orange', 'Banana')?
What would fruits[0:-1] return if fruits = ('Apple', 'Orange', 'Banana')?
What would fruits[0:-1] return if fruits = ('Apple', 'Orange', 'Banana')?
Which of the following correctly describes how to create a new tuple from an existing one?
Which of the following correctly describes how to create a new tuple from an existing one?
In Python, which of the following statements about tuples is true?
In Python, which of the following statements about tuples is true?
What method is used to retrieve all keys from a dictionary?
What method is used to retrieve all keys from a dictionary?
Which of the following statements is true regarding dictionary keys in Python?
Which of the following statements is true regarding dictionary keys in Python?
What does the method dictionary_name.items() return?
What does the method dictionary_name.items() return?
How can you change the value associated with a specific key in a dictionary?
How can you change the value associated with a specific key in a dictionary?
What will happen if you attempt to change a key in a dictionary directly?
What will happen if you attempt to change a key in a dictionary directly?
If you want to delete a key from a dictionary, which statement would you use?
If you want to delete a key from a dictionary, which statement would you use?
In a for-loop iterating over a dictionary's items, how are the key and value accessed?
In a for-loop iterating over a dictionary's items, how are the key and value accessed?
What structure does a dict_items() object hold?
What structure does a dict_items() object hold?
Why is using an alias for a package or module beneficial?
Why is using an alias for a package or module beneficial?
What command would you use to upgrade a package called 'example_package'?
What command would you use to upgrade a package called 'example_package'?
Which of the following packages is primarily used for data visualization?
Which of the following packages is primarily used for data visualization?
What is the correct command to uninstall a package named 'test_package'?
What is the correct command to uninstall a package named 'test_package'?
Which command is used to install a package while specifying pip3?
Which command is used to install a package while specifying pip3?
Which package would you use to manage multi-dimensional arrays in Python?
Which package would you use to manage multi-dimensional arrays in Python?
To send HTTP requests using Python, which package would you utilize?
To send HTTP requests using Python, which package would you utilize?
What command is used to list installed packages with pip?
What command is used to list installed packages with pip?
What is the correct way to merge two lists in Python?
What is the correct way to merge two lists in Python?
How can you access a value in a dictionary?
How can you access a value in a dictionary?
What is the correct format for defining a dictionary in Python?
What is the correct format for defining a dictionary in Python?
Which of the following methods can be used to print items in a list?
Which of the following methods can be used to print items in a list?
What kind of structure does a dictionary maintain?
What kind of structure does a dictionary maintain?
What should be used to allow users to input data into a list without a fixed number of entries?
What should be used to allow users to input data into a list without a fixed number of entries?
How do you modify the middle item of a list?
How do you modify the middle item of a list?
How is the price of 'Apple' accessed from the fruits_price dictionary?
How is the price of 'Apple' accessed from the fruits_price dictionary?
Study Notes
Built-In Functions in Python
- Functions such as
abs(),all(),any(), andascii()are predefined in Python for various operations. - Methods are routines that apply to specific object types, meaning certain methods work only with certain data types.
- Common methods for specific data types can be found in references for tuples, lists, dictionaries, and strings.
Tuples
- A tuple is defined as an immutable collection of values within parentheses, e.g.,
tuple_name = (element1, element2, ...). - Typically used for data sharing without allowing modification, e.g.,
employee_A1 = ("Jimmy Chow", "Engineer", "Grade 2"). - Indexing starts at 0; to access elements, use the index operator
[](e.g.,fruits[0]refers to "Apple"). - A tuple can be subsetted using a colon, e.g.,
tuple_subset = fruits[0:2], excluding the end index. - Negative indexing allows access to elements starting from the end, e.g.,
fruits[-1]refers to "Banana".
Editing and Concatenating Tuples
- Tuples are immutable and cannot be edited once created.
- To merge tuples or lists, they can be combined into a new structure, e.g.,
combined = [fruits, vegetables].
Dictionaries
- A dictionary is an unordered set of unique key:value pairs, e.g.,
fruits_price = {"Apple": 1.20, "Orange": 0.70}. - Dictionary values are accessed via their unique keys, for example,
apple_price = fruits_price["Apple"]. - Use
.keys(),.values(), and.items()to retrieve keys, values, and both keys and values, respectively.
Editing Dictionaries
- Dictionary values can be changed by assigning a new value to an existing key, e.g.,
fruits_price["Apple"] = 120. - Keys cannot be directly changed; a new key must be created, and the old key must be deleted using
del.
Packages and Installation
- Numerous Python packages enhance its functionality, including:
matplotlibfor data visualizationNumPyfor multi-dimensional arrayspandasfor data table managementrequestsfor sending HTTP requests
- Use
piporpip3to install packages:pip install package_name. - To upgrade or uninstall packages, commands such as
pip install package_name --upgradeandpip uninstall package_nameare used.
General Programming Tips
- Use loops to print list items. Example:
for item in list_name: print(item). - User-defined data can be collected into lists using
input()and a while-loop for continuous entries. - Create structured programs by defining clear tasks such as modifying list items and merging lists.
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Description
Test your knowledge on Python's built-in functions with this engaging quiz. From abs() to zip(), see how well you understand their usage and applications. Perfect for beginners and experienced programmers alike!
