在 Python 中,循环语句是实现重复操作的重要工具。本文将深入探讨 Python 循环语句的高级应用。
# 遍历字典并同时获取键和值 my_dict = {'a': 1, 'b': 2, 'c': 3} for key, value in my_dict.items(): print(f'Key: {key}, Value: {value}') # 遍历多个序列 names = ['Alice', 'Bob', 'Charlie'] ages = [25, 30, 35] for name, age in zip(names, ages): print(f'{name} is {age} years old.')
# 使用条件判断和计数器控制循环 counter = 0 while counter < 5: print(counter) counter += 1 # 处理循环中的异常 while True: try: num = int(input("Enter a number: ")) break except ValueError: print("Invalid input. Please enter a number.")
# 嵌套循环实现矩阵乘法 matrix1 = [[1, 2], [3, 4]] matrix2 = [[5, 6], [7, 8]] result = [[0, 0], [0, 0]] for i in range(len(matrix1)): for j in range(len(matrix2[0])): for k in range(len(matrix2)): result[i][j] += matrix1[i][k] * matrix2[k][j] for row in result: print(row)
# 使用列表推导式替代简单的循环 numbers = [1, 2, 3, 4, 5] squared_numbers = [num ** 2 for num in numbers] print(squared_numbers) # 在循环中避免不必要的计算 data = [10, 20, 30, 40, 50] total = 0 min_value = min(data) for num in data: if num > min_value: total += num print(total)
本文转自:https://www.wodianping.com/app/2024-10/45962.html
标签:语句,Python,value,num,numbers,深度,print,matrix2,循环 From: https://www.cnblogs.com/wodianpingcom/p/18449444