Podcast
Questions and Answers
What does the prompt symbol '>>>' signify in the Python shell?
What does the prompt symbol '>>>' signify in the Python shell?
- Python is waiting for user input (correct)
- Python encountered an error
- Python is executing a command
- Python is running a script
What should you do if you find a Python version less than 3.9 installed?
What should you do if you find a Python version less than 3.9 installed?
- Install Anaconda Python instead
- Revisit the installation instructions (correct)
- Ignore it, as it's not important
- Upgrade your operating system
What command would you use to check the installed version of Python 3 on Ubuntu?
What command would you use to check the installed version of Python 3 on Ubuntu?
- $ python3 --version (correct)
- $ python3 --check
- $ check python3 version
- $ python3 -version
If the Python version displayed is 2.x, what should you consider doing?
If the Python version displayed is 2.x, what should you consider doing?
What does the command '$ lsb_release -a' provide you?
What does the command '$ lsb_release -a' provide you?
If the Python code in the book is tested only on a specific installation type, which type is it referring to?
If the Python code in the book is tested only on a specific installation type, which type is it referring to?
What is the outcome of running '$ python --version' in the terminal?
What is the outcome of running '$ python --version' in the terminal?
What is a possible limitation when installing Python using Anaconda?
What is a possible limitation when installing Python using Anaconda?
What is indicated by the '>>>' symbol in the Python interactive window?
What is indicated by the '>>>' symbol in the Python interactive window?
What can you do in the IDLE's interactive window?
What can you do in the IDLE's interactive window?
What will happen if a Python program contains an error?
What will happen if a Python program contains an error?
Which of the following statements is true about the IDLE editor window?
Which of the following statements is true about the IDLE editor window?
What can you see at the top of the interactive window in IDLE?
What can you see at the top of the interactive window in IDLE?
How can you check your learning progress after installing Python?
How can you check your learning progress after installing Python?
What feature distinguishes the interactive window from the editor window in IDLE?
What feature distinguishes the interactive window from the editor window in IDLE?
Which component of IDLE displays the commands to get help and view information about Python?
Which component of IDLE displays the commands to get help and view information about Python?
What is a recommended maximum length for variable names in Python?
What is a recommended maximum length for variable names in Python?
What naming convention is preferred for variable names in Python?
What naming convention is preferred for variable names in Python?
Where can you find the style guide that recommends Python variable naming conventions?
Where can you find the style guide that recommends Python variable naming conventions?
What happens when you reference a variable in the interactive window?
What happens when you reference a variable in the interactive window?
What does PEP stand for in Python?
What does PEP stand for in Python?
What is a common issue with excessively long variable names?
What is a common issue with excessively long variable names?
Which is NOT a benefit of following PEP 8 guidelines?
Which is NOT a benefit of following PEP 8 guidelines?
Which of the following is an example of a variable name in mixedCase?
Which of the following is an example of a variable name in mixedCase?
What does the last line of a traceback indicate?
What does the last line of a traceback indicate?
Why are variables important in programming?
Why are variables important in programming?
What is a common reason for a NameError in Python?
What is a common reason for a NameError in Python?
Which statement best describes the role of the assignment operator?
Which statement best describes the role of the assignment operator?
What type of error occurs when a program runs but encounters a problem during execution?
What type of error occurs when a program runs but encounters a problem during execution?
How should variable names be chosen according to Python conventions?
How should variable names be chosen according to Python conventions?
Which of the following is true regarding syntax errors?
Which of the following is true regarding syntax errors?
What could the 'Hello' in the NameError example imply if it is not defined?
What could the 'Hello' in the NameError example imply if it is not defined?
What will the output be when the following code is executed: print("""An example of a...string that spans across multiple lines...and also preserves whitespace.""")?
What will the output be when the following code is executed: print("""An example of a...string that spans across multiple lines...and also preserves whitespace.""")?
Which operator is used for string concatenation in Python?
Which operator is used for string concatenation in Python?
What would be the value of magic_string after executing the following code: string1 = "abra"; string2 = "cadabra"; magic_string = string1 + string2?
What would be the value of magic_string after executing the following code: string1 = "abra"; string2 = "cadabra"; magic_string = string1 + string2?
If string1 = "Python" and string2 = "Rules", what will the result of string1 + string2 be?
If string1 = "Python" and string2 = "Rules", what will the result of string1 + string2 be?
How would you print a string with an apostrophe correctly in Python?
How would you print a string with an apostrophe correctly in Python?
What will the following command output: print("Hello " + "World")?
What will the following command output: print("Hello " + "World")?
What will the value of full_name be after executing: full_name = first_name + " " + last_name with first_name = "Arthur" and last_name = "Dent"?
What will the value of full_name be after executing: full_name = first_name + " " + last_name with first_name = "Arthur" and last_name = "Dent"?
If a string is coded across multiple lines but should print on a single line, how should it be formatted?
If a string is coded across multiple lines but should print on a single line, how should it be formatted?
Study Notes
Python Shell
- Python shell window indicates the version of Python being used and OS information.
- Users should verify the Python version is 3.9 or higher, or reinstall to the latest version.
- The ">>>" symbol is the prompt which indicates Python is ready for user input.
Installing Python on Ubuntu Linux
- Ubuntu Linux distributions might already have Python installed, but may not be the latest version.
- Users can check installed versions by using the commands:
$ python --versionand$ python3 --version. - If the version is less than 3.9, then install the latest version.
- Ubuntu users can determine their version by running the command
$ lsb_release -aand looking for the "Release" value.
Python Interactive Window
- The interactive window allows users to type Python code and see the results immediately.
- The interactive window displays information about the Python version, operating system, and help commands.
- The
>>>symbol is the prompt that indicates where to type Python code.
Python Errors
- Syntax Errors occur when code is invalid.
- Runtime Errors, also called exceptions, happen during program execution.
- The traceback provides information about the error and helps find the source of the problem, making it easier to fix the code.
Variables
- Variables allow storing values that can be used later in the code.
- Variables make code more readable and efficient.
- The assignment operator (
=) is used to assign values to variables.
Variable Naming Conventions
- Python uses lower_case_with_underscores naming convention, where variable names are lowercase and separated with underscores.
- PEP-8, the Python Style Guide, recommends this style.
- MixedCase was previously common, but is less popular.
- Descriptive variable names make the code easier to understand by anyone reading it.
Inspecting Values
- In Python, variables can be inspected in the interactive window by simply typing the variable name and pressing Enter.
- For example, typing
greetingand pressing Enter will display the value assigned to the variable, even if it wasn't used by theprint()function.
Multiline Strings
- Triple quoted strings (using three quotation marks) preserve whitespace and allow for strings that span multiple lines.
String Concatenation
- The
+operator can be used to join two strings together. - Concatenation happens without adding whitespace between the joined strings.
- When concatenating strings, make sure to add a space character if needed to separate the strings with space or any other desired character.
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Description
This quiz focuses on verifying Python installation and ensuring version 3.9 or higher on Ubuntu Linux. Participants will learn how to check existing versions and install the latest Python. Gain familiarity with the Python shell and interactive window prompts.
