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。 使
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...
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...
# Calculating the power of numbers # Without using List Comprehension def test_01_v0(numbers): output = [] forninnumbers: output.append(n ** 2.5) returnoutput # Improved version # (Using List Comprehension) def test_01_v1(numbers): ...
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...
importmatplotlib.pyplotaspltdefcount_odd_even(numbers):odd_count=0even_count=0forvalueinnumbers:ifvalue%2!=0:odd_count+=1else:even_count+=1returnodd_count,even_countdefplot_pie_chart(numbers):odd_count,even_count=count_odd_even(numbers)labels=['奇数','偶数']sizes=[odd_count,even_count]...
numbers=[1,2,3,4,5,6]even_numbers=filter(lambdax:x%2==0,numbers)fornumineven_numbers:print(num) 映射平方操作: squared=map(lambdax:x**2,numbers)forsquareinsquared:print(square) 通过这些内置工具,我们可以更高效地处理数据,进行各种复杂的迭代操作。
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 ...
While some of the examples you see below may not be WTFs in the truest sense, but they'll reveal some of the interesting parts of Python that you might be unaware of. I find it a nice way to learn the internals of a programming language, and I believe that you'll find it ...