# 对于字符串text = "Hello, how are you?"count_e = text.count('e')print("Count of 'e' in the text:", count_e)# 对于列表numbers = [1, 2, 3, 2, 4, 2, 5, 2]count_2 = numbers.count(2)print("Count of '2' in the list:", count_2)count() 函数在字符串和列表中的使用...
numbers_input=input("请输入一串数字:")numbers_list=list(map(int,numbers_input.split()))number_count={}fornumberinnumbers_list:ifnumberinnumber_count:number_count[number]+=1else:number_count[number]=1fornumber,countinnumber_count.items():print(f"数字{number}出现的次数为{ 1. 2. 3. 4. 5...
count函数还可以用于更高级的应用，如统计满足特定条件的元素数量。下面是一个示例，统计列表中大于某个阈值的元素个数：numbers = [10, 15, 20, 25, 30, 35]threshold = 20count_above_threshold = sum(1 for num in numbers if num > threshold)print(count_above_threshold) # 输出：3 在这个示例中，...
numbers = [1, 2, 3, 4, 3, 2, 1, 1, 5, 6, 7, 5, 1] one_count = numbers.count(1) two_count = numbers.count(2) three_count = numbers.count(3) print("1出现的次数:", one_count) print("2出现的次数:", two_count) print("3出现的次数:", three_count) --- 1出现的次数:...
numbers = [1, 2, 3, 4, 5]for number in numbers:print(number)# 输出: 12345 你也可以使用for循环来迭代一个字符串，像这样：word = 'Python'for letter in word:print(letter)# 输出: Python Python中的while循环 while循环允许你重复执行一个代码块，只要某个条件为真。下面是一个while循环的例子，...
importmatplotlib.pyplotasplt# 准备数据labels=['1','2','3','4','5','6','7','8','9','10']sizes=[numbers.count(int(label))forlabelinlabels]# 绘制饼状图plt.pie(sizes,labels=labels,autopct='%1.1f%%',startangle=90)plt.axis('equal')# 使饼状图为圆形plt.title('数字分布饼图')plt...
4, 2, 5, 2] count_2 = numbers.count(2) print("Count of '2' in the list:", count_2...
The count() method returns the number of times the specified element appears in the list. Example # create a list numbers = [2, 3, 5, 2, 11, 2, 7] # check the count of 2 count = numbers.count(2) print('Count of 2:', count) # Output: Count of 2: 3 Run Code Syntax ...
double = [number * 2 for number in numbers] print(double) [0, 2, 4, 6, 8, 10, 12, 14, 16, 18] 列表逆序 反向1 numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] reverse = list(reversed(numbers)) print(reverse) [9, 8, 7, 6, 5, 4, 3, 2, 1, 0] ...
count_1 = my_list.count(1) print(count_1)# 输出"3",表示数字1在列表中出现了3次 以上示例中,我们创建了一个包含6个元素的列表 my_list ,其中数字 1 出现了3次。我们使用 count() 方法统计数字 1 在列表中出现的次数,并将结果保存到变量 count_1 中,输出结果为 3 。