def find_even_numbers(lst): return [num for num in lst if num % 2 == 0] # 示例 print(find_even_numbers([1, 2, 3, 4, 5, 6])) # 输出: [2, 4, 6] 1. 2. 3. 4. 5. 例题12:检查一个字符串是否只包含数字 def is_digit_only(s): return s.isdigit() # 示例 print(is_di...
deffind_first_even(numbers):result=None # 初始化变量fornuminnumbers:ifnum%2==0:result=numbreakreturnresultprint(find_first_even([1,3,5]))# 输出None,因为没有偶数 过程中的注意事项 明确变量作用域:理解Python中变量的作用域,确保在变量的作用域内使用前已经初始化。
编写一个Python函数,接收一个整数列表作为参数,返回列表中所有偶数的平均值。```pythondef average_even(numbers):evens = [x for x in numbers if x % 2 == 0]if len(evens) == 0:return 0return sum(evens) / len(evens)numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]print(a
16. Numbers with All Even Digits Write a Python program to find numbers between 100 and 400 (both included) where each digit of a number is an even number. The numbers obtained should be printed in a comma-separated sequence. Pictorial Presentation: Sample Solution: Python Code: # Create an...
使用count_matching_elements函数统计偶数的个数 even_count = count_matching_elements(numbers, is_even...
even_numbers=rdd.filter(lambda x:x%2==0)# 输出过滤后的结果print(even_numbers.collect())# 停止 PySpark 程序 sc.stop() 执行结果 : 代码语言:javascript 代码运行次数:0 运行 AI代码解释 Y:\002_WorkSpace\PycharmProjects\pythonProject\venv\Scripts\python.exeY:/002_WorkSpace/PycharmProjects/HelloPy...
# 提取列表中的偶数my_list=[1,2,3,4,5,6,7,8,9,10]even_numbers=[xforxinmy_listifx%2==0]print(even_numbers)# 输出[2, 4, 6, 8, 10]# 提取字符串中的大写字母my_string='Hello, World!'uppercase_letters=[xforxinmy_stringifx.isupper()]print(uppercase_letters)# 输出['H', 'W'...
def test_02_v1(numbers): my_list_length = len(numbers) output_list = [] foriinrange(my_list_length): output_list.append(i * 2) returnoutput_list 通过将列表长度计算移出for循环,加速1.6倍,这个方法可能很少有人知道吧。 # Summary Of ...
Documents.Open(file_path) doc_app.Visible = True search_range = doc.Content search_range.Find...
deftest_01_v1(numbers): output=[n**2.5forninnumbers] returnoutput 结果如下: # Summary Of Test Results Baseline: 32.158 ns per loop Improved: 16.040 ns per loop % Improvement: 50.1 % Speedup: 2.00x 可以看到使用列表推导式可以得到2倍速的提高 ...