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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    Description

    This quiz covers essential Python functions including counting elements in a list, reversing strings, and reading from and writing to files. Test your understanding of how these fundamental operations work in Python programming! Dive into the practical application of functions and file handling.

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