Untitled Quiz

<p>Python's floating point arithmetic can introduce precision errors. (B)</p> Signup and view all the answers

<p>Press <code>ESC</code> then <code>L</code>. (B)</p> Signup and view all the answers

<p>26 (C)</p> Signup and view all the answers

<p>Displayed up to 17 significant digits. (D)</p> Signup and view all the answers

<p>Local Anaconda installation (B)</p> Signup and view all the answers

<p>It adds elements to the end of the list. (C)</p> Signup and view all the answers

<p>Using the count() method. (C)</p> Signup and view all the answers

<p>pop() (D)</p> Signup and view all the answers

<p>The sort() method modifies the list in place and returns None. (D)</p> Signup and view all the answers

<p>Dictionaries store objects in key-value pairs. (C)</p> Signup and view all the answers

<p>Using brackets and commas. (B)</p> Signup and view all the answers

<p>It combines another list or iterable into the current list. (A)</p> Signup and view all the answers

<p>reverse() (A)</p> Signup and view all the answers

<p>Faster development time (C)</p> Signup and view all the answers

<p>my_string[1:5:2] (A), my_string[0:5:1] (D)</p> Signup and view all the answers

<p>Variable names cannot include special meaning words like 'str'. (C)</p> Signup and view all the answers

<p>The band for Sarah Fier is 8 out of 10 (B)</p> Signup and view all the answers

<p>-5 (C)</p> Signup and view all the answers

<p>my_name.format('Hello') (C)</p> Signup and view all the answers

<p>Python raises a syntax error. (A)</p> Signup and view all the answers

<p>200 (D)</p> Signup and view all the answers

<p>The set will ignore the duplicate and keep unique values. (A)</p> Signup and view all the answers

<p>Discard (D)</p> Signup and view all the answers

<p>It adds elements from another iterable to the set. (B)</p> Signup and view all the answers

<p>set('Mississippi') (A)</p> Signup and view all the answers

<p>An empty string will be returned. (A)</p> Signup and view all the answers

<p>Sets can contain mixed data types. (B)</p> Signup and view all the answers

<p>A list of all lines in the file. (A)</p> Signup and view all the answers

<p>It removes and returns an arbitrary element from the set. (C)</p> Signup and view all the answers

<p>To reset the cursor to the beginning of the file (D)</p> Signup and view all the answers

<p>A list of all lines in the file (B)</p> Signup and view all the answers

<p>To prevent errors when trying to delete the file externally (B)</p> Signup and view all the answers

<p>Write only mode, overwriting existing content (B)</p> Signup and view all the answers

<p>It automatically closes the file after the block is executed. (B)</p> Signup and view all the answers

<p>Python will create the file. (C)</p> Signup and view all the answers

<p>Read from and write to the file (D)</p> Signup and view all the answers

<p>s[-1] (A)</p> Signup and view all the answers

<p>Tuples are immutable and cannot be changed. (D)</p> Signup and view all the answers

<p>Setdefault (B)</p> Signup and view all the answers

<p>Add new unique items (C)</p> Signup and view all the answers

<p>It will raise an error. (B)</p> Signup and view all the answers

<p>[100, 200, 300] (A)</p> Signup and view all the answers

<p>To return and remove the last inserted key-value pair. (B)</p> Signup and view all the answers

<p>Count (D)</p> Signup and view all the answers

<p>Sets store unique, unordered elements. (C)</p> Signup and view all the answers

Python can be installed using Anaconda from www.anaconda.com/downloads. Free online options like jupyter.org/try and Google Colab are alternative ways to use Python.

Jupyter Notebook uses keyboard shortcuts for common actions like toggling header or toolbar, and viewing line numbers.

Line numbers in code cells can be added via the Jupyter Notebook menu (View -> Toggle Line Numbers) or by using a keyboard shortcut (ESC then L).

Tuples are immutable sequences (cannot be changed after creation) represented with parentheses, while lists are mutable sequences (can be changed) represented with square brackets.

Python supports integers (whole numbers) and floating-point numbers (numbers with decimals).

Due to how computers store floating-point numbers, calculations involving decimals might not always produce precise results, like 0.1 + 0.2 != 0.3.

Python variable names cannot start with a number, contain spaces, or use special symbols like ", /, ?, , (, ), !, @, #, etc. Lowercase names are preferred (PEP 8).

Python follows a specific order for evaluating mathematical operations (parentheses, exponents, multiplication, division, addition, subtraction).

Python allows variables to hold different data types without explicit declaration.

Changing a variable's value to a different data type is allowed in Python.

A sequence of characters enclosed in single or double quotes.

Accessing individual characters within a string using their position (index).

Extracting a portion (a "slice") of a string based on starting and ending positions.

Injecting variable values into strings for printing (displaying).

Special characters used to represent non-printable characters or formatting in strings.

The total number of characters within a string or sequence.

Adds an element to the end of a list.

Counts how many times an element appears in a list.

Retrieving elements from a list using their position.

Selecting a portion of a list by its range of indices.

Lists store objects in order; Dictionaries use key-value pairs for faster retrieval.

A way to store objects in dictionaries—using unique keys to identify each object’s value.

Unordered data-structures used to store data using key-value pairs.

Lists containing other lists.

Lists are ordered collections of items that can be indexed, sliced, and modified. They use square brackets [ ] to enclose elements.

Lists are mutable, meaning their elements can be changed or modified after they're created.

Dictionaries are unordered collections of key-value pairs. Keys are unique and can be used to access the corresponding value.

You can access the value associated with a key using square brackets [ ] and the key name, like my_dict['Key1'].

Tuples are ordered, immutable collections of items enclosed in parentheses ( ). They are similar to lists but cannot be changed after creation.

Once elements are inside a tuple, they cannot be reassigned. This ensures data integrity in situations where you need a constant sequence.

Sets are unordered collections of unique elements. They are used to store multiple items without duplicates, and are represented by curly braces { }.

Sets are mutable, allowing you to add or remove elements after creation. However, the elements themselves are immutable.

Move the file's reading position back to the beginning. This allows you to read the entire file again from the start.

Read the entire contents of a file into a list, where each line is an element in the list.

Read only the next line from a file, returning the line as a string.

Use the full path of the file to open it regardless of where your Python script is located.

Release the file, allowing other programs to access it, and preventing errors.

A safer way to open a file. It automatically closes the file when finished, even if errors occur.

Different ways to open a file, specifying how you'll interact with it (read, write, append, etc.).

Opens a file for writing. If the file doesn't exist, it's created. Existing content is overwritten.

Sets are created using curly braces {} and elements are separated by commas. For example, {1, 2, 3} creates a set with elements 1, 2, and 3.

The 'add()' method is used to add an element to a set.

The 'remove()' method is used to remove an element from a set. If the element doesn't exist, it will raise an error.

A boolean represents a truth value, either True or False, and is used to represent logical statements.

The 'open()' function is used to open a file in Python. It takes the file name as an argument and returns a file object that can be used to read or write data to the file.

The 'read()' method is used to read the entire contents of a file into a string.

The 'readline()' method is used to read a single line from a file. It returns the line as a string, including the newline character at the end.