18 Questions
In Python, which method can be used to add an item to the end of a list?
Insert
What method in Python can be used to remove an item from a list without knowing its index?
Pop
Which method can be used in Python to change the order of elements in a list?
Sort
What method in Python can be used to reverse the order of elements in a list?
Sort
Which method in Python is used to remove an element at a specified position from a list?
Remove
In Python, which method can be used to add multiple items to the end of a list?
Extend
In Python, which method can be used to remove an element from a list?
pop()
What is the purpose of the insert() method in Python for lists?
To add an element to a specific index in the list
Which method in Python can be used to reverse the order of elements in a list?
reverse()
When using the sort() method in Python, how are the elements typically arranged?
In ascending order
Which method in Python is used to remove an element from a specific index in a list and return it?
pop()
If a Python list contains [4, 2, 6, 1, 3], what would be the result after calling the sort() method on it?
[1, 2, 3, 4, 6]
What does the 'finally' block in Python do?
It is executed regardless of whether an exception occurs in the try block or not.
What would happen if you set b to 2 in the given code and input a character instead of a number?
The program would print 'invalid input'.
What is the purpose of modules in Python?
To break down large programs into smaller, manageable files.
What does the 'input()' function do in Python?
It reads a line from input (usually user), converts it to a string by removing the trailing newline, and returns it.
What is the output of the given code when a=5, b=0, and you give a string as input?
The output is 'the value can not be divided by zero division by zero' and 'resource closed'.
What does the 'int()' function do in Python?
It converts a string to an integer.
Study Notes
Iterating over a List
- Method 1: Using for loop to iterate over a list, example:
for item in list: print('college ', i, ' is ', item) - Method 2: Using for loop and range() function to iterate over a list, example:
for i in range(length): print(list[i]) - Method 3: Using while loop to iterate over a list, example:
while i < length: print(list[i])
Mutability and List Operations
- Mutable objects can be changed after creation, immutable objects cannot
- Append: adds an item to a list, example:
x.append(10) - Extend: appends a sequence to a list
Operator Precedence
- Multiplication gets evaluated before addition
- Parentheses () can override the precedence of arithmetic operators
- Examples of operator precedence with different expressions
Comments in Python
- Single-line comments start with
#symbol - Multi-line comments use triple double quotes
""" """or single quotes `''' ''' - Example of single-line and multi-line comments
Modules in Python
- A Python module is a file containing Python code, including functions, classes, and variables
- Modules can be used to break down large programs into smaller, manageable files
- Example of creating and using a module
Exception Handling
- Example of try-except-finally block to handle ZeroDivisionError
- Example of try-except block to handle ValueError and generic Exception
- Importance of exception handling in Python
Test your knowledge of Python error handling with this quiz. The quiz includes a code snippet that demonstrates handling a ZeroDivisionError and prompts users to modify the code to observe different outputs. See if you can predict the output in various scenarios!
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