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| Section | Objectives |
|---|---|
| File Handling and Exceptions | - Exception Handling (try, except, finally) - Custom Exceptions - Reading and Writing Files |
| Data Structures | - String Manipulation - Sets - Dictionaries - Tuples - Lists and List Operations |
| Functions | - Parameters and Arguments - Function Definition and Call - Recursion - Scope (local and global) - Return Values |
| Python Fundamentals | - Operators and Expressions - Variables and Data Types - Type Conversion - Input/Output Operations |
| Object-Oriented Programming | - Encapsulation - Attributes and Methods - Constructors (__init__) - Classes and Objects - Inheritance |
| Testing and Debugging | - Unit Testing Concepts - Debugging Techniques - Trace Errors |
| Control Structures | - Loops (for, while) - Loop Control (break, continue, pass) - Conditional Statements (if, elif, else) - Nested Conditionals and Loops |
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問題 #48
Complete the function format_name(first, last) that takes a first name and last name and returns them combined as " last, first " .
For example, format_name( " John " , " Smith " ) should return " Smith, John " .
def format_name(first, last):
# TODO: Return the name in " last, first " format
pass
答案:
解題說明:
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives two string parameters: first and last.
Step 2: The required format is the last name first, followed by a comma, a space, and then the first name.
Step 3: Use string concatenation to combine the values correctly.
Correct code:
def format_name(first, last):
return last + " , " + first
Example:
print(format_name( " John " , " Smith " ))
Output:
Smith, John
問題 #49
In the code for item in my_list:, what does item represent?
答案:B
問題 #50
Complete the function get_second_item(items) that takes a list and returns the second item. Assume the input is always a list containing at least two elements.
For example, get_second_item([10, 20, 30]) should return 20.
def get_second_item(items):
# TODO: Return the second item from the list
pass
答案:
解題說明:
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: Python list indexing starts at 0.
Step 2: The first item is at index 0.
Step 3: The second item is at index 1.
Step 4: Return the value at index 1.
Correct code:
def get_second_item(items):
return items[1]
Example:
print(get_second_item([10, 20, 30]))
Output:
20
問題 #51
Write a complete function password_strength(password) that returns " Strong " if the password is at least 8 characters long and contains both letters and numbers, " Weak " otherwise.
For example, password_strength( " abc123def " ) should return " Strong " .
def password_strength(password):
# TODO: Return " Strong " or " Weak " based on password criteria
if len(password) < 8:
return " Weak "
has_letter = False
has_number = False
for char in password:
if char.isalpha():
has_letter = True
elif char.isdigit():
has_number = True
# TODO: Add your return logic here based on has_letter and has_number
pass
答案:
解題說明:
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: First, check the password length using len(password).
Step 2: If the password has fewer than 8 characters, return " Weak " immediately.
Step 3: Create two Boolean variables: has_letter and has_number.
Step 4: Loop through each character in the password.
Step 5: Use .isalpha() to check for letters and .isdigit() to check for numbers.
Step 6: If the password contains both at least one letter and at least one number, return " Strong " .
Step 7: Otherwise, return " Weak " .
Correct code:
def password_strength(password):
if len(password) < 8:
return " Weak "
has_letter = False
has_number = False
for char in password:
if char.isalpha():
has_letter = True
elif char.isdigit():
has_number = True
if has_letter and has_number:
return " Strong "
else:
return " Weak "
Example:
print(password_strength( " abc123def " ))
print(password_strength( " abcdefgh " ))
print(password_strength( " 12345678 " ))
Output:
Strong
Weak
Weak
問題 #52
Complete the function double_number(num) that takes one number parameter and returns double that number.
For example, double_number(5) should return 10.
def double_number(num):
# TODO: Return double the input number
# Example: double_number(5) should return 10
pass
答案:
解題說明:
See the Step by Step Solution below in Explanation.
Explanation:
Step 1: The function receives one parameter named num.
Step 2: To double a number, multiply it by 2.
Step 3: The function should return the result using the return statement.
Correct code:
def double_number(num):
return num * 2
Example:
print(double_number(5))
Output:
10
問題 #53
......
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