Python をシンプルに: 初心者から上級者まで |ブログ

# This is a simple "Hello World" program that demonstrates basic print statements # Print the string "Hello world" to the console print("Hello world") # Print the integer 1 to the console print(1) # Print the integer 20 to the console print(20)

# This program demonstrates the use of variables and string concatenation # Assign the string "Dipsan" to the variable _name _name = "Dipsan" # Assign the integer 20 to the variable _age _age = 20 # Assign the string "piano" to the variable _instrument _instrument = "piano" # Print a sentence using string concatenation with the _name variable print("my name is" + _name + ".") # Print a sentence using string concatenation, converting _age to a string print("I'm" + str(_age) + "years old") # Converting int to string for concatenation # Print a simple string print("i dont like hanging out") # Print a sentence using string concatenation with the _instrument variable print("i love " + _instrument + ".")

# This script demonstrates various string operations # Assign a string to the variable 'phrase' phrase = "DipsansAcademy" # Print a simple string print("This is a string") # Concatenate strings and print the result print('This' + phrase + "") # Convert the phrase to uppercase and print print(phrase.upper()) # Convert the phrase to lowercase and print print(phrase.lower()) # Check if the uppercase version of phrase is all uppercase and print the result print(phrase.upper().isupper()) # Print the length of the phrase print(len(phrase)) # Print the first character of the phrase (index 0) print(phrase[0]) # Print the second character of the phrase (index 1) print(phrase[1]) # Print the fifth character of the phrase (index 4) print(phrase[4]) # Find and print the index of 'A' in the phrase print(phrase.index("A")) # Replace "Dipsans" with "kadariya" in the phrase and print the result print(phrase.replace("Dipsans", "kadariya"))

# Import all functions from the math module from math import * # Importing math module for additional math functions # This script demonstrates various numeric operations and math functions # Print the integer 20 print(20) # Multiply 20 by 4 and print the result print(20 * 4) # Add 20 and 4 and print the result print(20 + 4) # Subtract 4 from 20 and print the result print(20 - 4) # Perform a more complex calculation and print the result print(3 + (4 - 5)) # Calculate the remainder of 10 divided by 3 and print the result print(10 % 3) # Assign the value 100 to the variable _num _num = 100 # Print the value of _num print(_num) # Convert _num to a string, concatenate with other strings, and print print(str(_num) + " is my fav number") # Converting int to string for concatenation # Assign -10 to the variable new_num new_num = -10 # Print the absolute value of new_num print(abs(new_num)) # Absolute value # Calculate 3 to the power of 2 and print the result print(pow(3, 2)) # Power function # Find the maximum of 2 and 3 and print the result print(max(2, 3)) # Maximum # Find the minimum of 2 and 3 and print the result print(min(2, 3)) # Minimum # Round 3.2 to the nearest integer and print the result print(round(3.2)) # Rounding # Round 3.7 to the nearest integer and print the result print(round(3.7)) # Calculate the floor of 3.7 and print the result print(floor(3.7)) # Floor function # Calculate the ceiling of 3.7 and print the result print(ceil(3.7)) # Ceiling function # Calculate the square root of 36 and print the result print(sqrt(36)) # Square root

# This script demonstrates how to get user input and use it in string concatenation # Prompt the user to enter their name and store it in the 'name' variable name = input("Enter your name : ") # Prompt the user to enter their age and store it in the 'age' variable age = input("Enter your age. : ") # Print a greeting using the user's input, concatenating strings print("hello " + name + " Youre age is " + age + " .")

# This script creates a basic calculator that adds two numbers # Prompt the user to enter the first number and store it in 'num1' num1 = input("Enter first number : ") # Prompt the user to enter the second number and store it in 'num2' num2 = input("Enter second number: ") # Convert the input strings to integers and add them, storing the result result = int(num1) + int(num2) # Print the result of the addition print(result)

# This program is used to create a simple Mad Libs game. # Prompt the user to enter an adjective and store it in 'adjective1' adjective1 = input("Enter an adjective: ") # Prompt the user to enter an animal and store it in 'animal' animal = input("Enter an animal: ") # Prompt the user to enter a verb and store it in 'verb' verb = input("Enter a verb: ") # Prompt the user to enter another adjective and store it in 'adjective2' adjective2 = input("Enter another adjective: ") # Print the first sentence of the Mad Libs story using string concatenation print("I have a " + adjective1 + " " + animal + ".") # Print the second sentence of the Mad Libs story print("It likes to " + verb + " all day.") # Print the third sentence of the Mad Libs story print("My " + animal + " is so " + adjective2 + ".")

# This script demonstrates basic list operations # Create a list of friends' names friends = ["Roi", "alex", "jimmy", "joseph"] # Print the entire list print(friends) # Print the first element of the list (index 0) print(friends[0]) # Print the second element of the list (index 1) print(friends[1]) # Print the third element of the list (index 2) print(friends[2]) # Print the fourth element of the list (index 3) print(friends[3]) # Print the last element of the list using negative indexing print(friends[-1]) # Print a slice of the list from the second element to the end print(friends[1:]) # Print a slice of the list from the second element to the third (exclusive) print(friends[1:3]) # Change the second element of the list to "kim" friends[1] = "kim" # Print the modified list print(friends)

# This script demonstrates various list functions and methods # Create a list of numbers numbers = [4, 6, 88, 3, 0, 34] # Create a list of friends' names friends = ["Roi", "alex", "jimmy", "joseph", "kevin", "tony", "jimmy"] # Print both lists print(numbers) print(friends) # Add all elements from 'numbers' to the end of 'friends' friends.extend(numbers) # Add "hulk" to the end of the 'friends' list friends.append("hulk") # Insert "mikey" at index 1 in the 'friends' list friends.insert(1, "mikey") # Remove the first occurrence of "Roi" from the 'friends' list friends.remove("Roi") # Print the index of "mikey" in the 'friends' list print(friends.index("mikey")) # Remove and print the last item in the 'friends' list print(friends.pop()) # Print the current state of the 'friends' list print(friends) # Remove all elements from the 'friends' list friends.clear() # Print the empty 'friends' list print(friends) # Sort the 'numbers' list in ascending order numbers.sort() # Print the sorted 'numbers' list print(numbers)

# This script introduces tuples and their immutability # Create a tuple with two elements values = (3, 4) # Print the entire tuple print(values) # Print the second element of the tuple (index 1) print(values[1]) # The following line would cause an IndexError if uncommented: # print(values[2]) # This would cause an IndexError # The following line would cause a TypeError if uncommented: # values[1] = 30 # This would cause a TypeError as tuples are immutable # The following line would print the modified tuple if the previous line worked: # print(values)

# This script demonstrates how to define and call functions # Define a function called 'greetings' that prints two lines def greetings(): print("HI, Welcome to programming world of python") print("keep learning") # Print a statement before calling the function print("this is first statement") # Call the 'greetings' function greetings() # Print a statement after calling the function print("this is last statement") # Define a function 'add' that takes two parameters and prints their sum def add(num1, num2): print(int(num1) + int(num2)) # Call the 'add' function with arguments 3 and 4 add(3, 4)

# This script demonstrates the use of return statements in functions # Define a function 'square' that returns the square of a number def square(num): return num * num # Any code after the return statement won't execute # Call the 'square' function with argument 2 and print the result print(square(2)) # Call the 'square' function with argument 4 and print the result print(square(4)) # Call the 'square' function with argument 3, store the result, then print it result = square(3) print(result)

# This script demonstrates the use of if-elif-else statements # Set boolean variables for conditions is_boy = True is_handsome = False # Check conditions using if-elif-else statements if is_boy and is_handsome: print("you are a boy & youre handsome") print("hehe") elif is_boy and not (is_handsome): print("Youre a boy but sorry not handsome") else: print("youre not a boy")

# This script demonstrates comparison operations in if statements # Define a function to find the maximum of three numbers def max_numbers(num1, num2, num3): if num1 >= num2 and num1 >= num3: return num1 elif num2 >= num1 and num2 >= num3: return num2 else: return num3 # Test the max_numbers function with different inputs print(max_numbers(20, 40, 60)) print(max_numbers(30, 14, 20)) print(max_numbers(3, 90, 10)) print("For min_number") # Define a function to find the minimum of three numbers def min_numbers(num1, num2, num3): if num1 <= num2 and num1 <= num3: return num1 elif num2 <= num1 and num2 <= num3: return num2 else: return num3 # Test the min_numbers function with different inputs print(min_numbers(20, 40, 60)) print(min_numbers(30, 14, 20)) print(min_numbers(3, 90, 10))

# This script improves the guessing game with more features import random # Generate a random number between 1 and 20 secret_number = random.randint(1, 20) # Initialize the number of attempts and set a limit attempts = 0 attempt_limit = 5 # Loop to allow the user to guess the number while attempts < attempt_limit: guess = int(input(f"Guess the number (between 1 and 20). You have {attempt_limit - attempts} attempts left: ")) if guess == secret_number: print("Congratulations! You guessed the number!") break elif guess < secret_number: print("Too low!") else: print("Too high!") attempts += 1 # If the user does not guess correctly within the attempt limit, reveal the number if guess != secret_number: print(f"Sorry, the correct number was {secret_number}.")

# List of numbers numbers = [1, 2, 3, 4, 5] # Iterate over each number in the list for number in numbers: # Print the current number print(number) # Output: # 1 # 2 # 3 # 4 # 5 # List of friends friends = ["Roi", "alex", "jimmy", "joseph", "kevin", "tony", "jimmy"] # Iterate over each friend in the list for friend in friends: # Print the name of the current friend print(friend) # Output: # Roi # alex # jimmy # joseph # kevin # tony # jimmy # Use range to generate numbers from 0 to 4 for num in range(5): print(num) # Output: # 0 # 1 # 2 # 3 # 4

# This script demonstrates the use of the exponential function def exponentialFunction(base,power): result = 1 for index in range(power): result = result * base return result print(exponentialFunction(3,2)) print(exponentialFunction(4,2)) print(exponentialFunction(5,2)) #or you can power just by print(2**3) #number *** power

# This script demonstrates the use of 2D List and For Loops # Define a 2D list (list of lists) num_grid = [ [1, 2, 3], # Row 0: contains 1, 2, 3 [4, 5, 6], # Row 1: contains 4, 5, 6 [7, 8, 9], # Row 2: contains 7, 8, 9 [0] # Row 3: contains a single value 0 ] # Print specific elements in num_grid print(num_grid[0][0]) # Print value in the zeroth row, zeroth column (value: 1) print(num_grid[1][0]) # Print value in the first row, zeroth column (value: 4) print(num_grid[2][2]) # Print value in the second row, second column (value: 9) print("using nested for loops") for row in num_grid : for col in row: print(col)