Python Basics: File I/O, Data Structures, OOP, and Exception Handling
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Questions and Answers

What is the purpose of the open() function in Python?

  • To write content to a file
  • To close a file
  • To read the entire file content
  • To open a file and return a file object (correct)

    • What is the main difference between a list and a tuple in Python?

  • Lists are used for numbers, tuples are used for strings
  • Lists are ordered, tuples are unordered
  • Lists are used for strings, tuples are used for numbers
  • Lists are mutable, tuples are immutable (correct)

    • What is the purpose of a try block in Python?

  • To enclose the code that may raise an exception (correct)
  • To handle an exception
  • To raise a custom exception
  • To signal an error or unexpected condition

    • What is the main purpose of a class in object-oriented programming?

    <p>To define a blueprint for creating objects</p> Signup and view all the answers

    What is the purpose of the 'a' mode when opening a file in Python?

    <p>To append to a file</p> Signup and view all the answers

    What is the purpose of the raise statement in Python?

    <p>To raise a custom exception</p> Signup and view all the answers

    Study Notes

    File Input/Output

    • Reading Files:
      • open() function to open a file and return a file object
      • read() method to read the entire file content
      • readline() method to read a single line
      • readlines() method to read multiple lines
    • Writing Files:
      • open() function to open a file in write mode ('w')
      • write() method to write content to the file
    • ** Modes:**
      • 'r' for reading
      • 'w' for writing (truncates the file if it exists)
      • 'a' for appending
      • 'r+' for reading and writing
      • 'rb' for reading binary files
      • 'wb' for writing binary files

    Data Structures

    • Lists:
      • Ordered collection of items
      • Can be indexed and sliced
      • Can be modified (mutable)
    • Tuples:
      • Ordered, immutable collection of items
      • Can be indexed and sliced
    • Dictionaries:
      • Unordered collection of key-value pairs
      • Can be modified (mutable)
    • Sets:
      • Unordered collection of unique items
      • Can be modified (mutable)

    Object-Oriented Programming

    • Classes:
      • Define a blueprint for creating objects
      • Can have attributes (data) and methods (functions)
    • Objects:
      • Instances of classes
      • Have their own attributes and methods
    • Inheritance:
      • A child class can inherit attributes and methods from a parent class
      • Can also override or extend the parent class's behavior

    Exception Handling

    • Try-Except Block:
      • try block to enclose the code that may raise an exception
      • except block to handle the exception
    • Types of Exceptions:
      • SyntaxError for syntax errors
      • TypeError for type-related errors
      • ValueError for value-related errors
      • RuntimeError for runtime errors
    • Raising Exceptions:
      • raise statement to raise a custom exception
      • Can be used to signal an error or unexpected condition

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    Description

    Test your knowledge of Python fundamentals, including file input/output, data structures like lists and dictionaries, object-oriented programming concepts, and exception handling techniques.

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