Python Functions and File Operations

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Questions and Answers

What does the function less_than do with its parameters?

  • Counts values in the list that are equal to the target.
  • Counts values in the list that are less than or equal to the target.
  • Counts values in the list that are strictly less than the target. (correct)
  • Counts values in the list that are greater than the target.

What is the expected output of the reverse_sentence function when given the string 'Hello World'?

  • olleH dlroW
  • Hello World
  • World Hello (correct)
  • dlroW olleH

What data structure is used to store information about home hydroponic gardens?

  • List
  • Tuple
  • Set
  • Dictionary (correct)

Which of the following is NOT a correct action for managing the file numbers.txt in the given Python program?

<p>Delete the numbers.txt file after reading. (B)</p> Signup and view all the answers

How does the function less_than handle its inputs?

<p>It traverses the list and counts based on the target parameter. (C)</p> Signup and view all the answers

What will be the final value of 'b' after executing the main function in the provided Python program?

<p>8 (B)</p> Signup and view all the answers

What is the expected output of the code segment that modifies the list 'num'?

<p>[9, 8, 7, 8, 1] (D)</p> Signup and view all the answers

What does the 'less_than' function return when the list is empty?

<p>0 (C)</p> Signup and view all the answers

What type of data is the 'gardens' dictionary meant to store?

<p>Various types of home hydroponic garden information (A)</p> Signup and view all the answers

What is the output of the 'reverse_sentence' function when given 'Python is cool'?

<p>looc si nohtyP (D)</p> Signup and view all the answers

Flashcards

Count numbers less than target

Write a function that counts numbers in a list smaller than a given target number.

Reverse a string

Write a function that prints a given sentence in reversed order.

Create a dictionary

Create a Python dictionary to store information about hydroponic gardens, called gardens.

Calculate file average

Read numbers from a file, calculate the average, and write the output to another file.

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Python Program

A program in Python to read numbers from a file (numbers.txt), calculate and output the average to another file (output.txt).

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Function parameter

A variable that receives a value from the caller when a function is called.

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Function return

The value a function sends back to the caller after it completes its task.

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Looping through a list

Iterating over each element of a list in a specific order.

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Function call

Invoking a function to execute its code block.

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Variable assignment

Storing a value in a variable using the assignment operator (=).

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Study Notes

Functions

  • less_than(numbers, target) function:

    • Takes a list of numbers and an integer target as input.
    • Iterates through the numbers list.
    • Counts how many numbers in the list are strictly less than the target value.
    • Returns the count.

  • reverse_sentence(sentence) function:

    • Takes a string sentence as input.
    • Prints the sentence in reverse order to standard output.

Dictionary

  • gardens dictionary:
    • Stores information about different types of home hydroponic gardens.
    • Key-value pairs to hold garden types and their details (e.g., type, size, features, cost).

Python Program for Average Calculation

  • Reads a file named numbers.txt containing numerical values.
  • Calculates the average of the numbers in the file.
  • Prints the calculated average to a file named output.txt.

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