3. List Comprehension using If-else We use anif-elsestatement within a list comprehension expression. This allows us to choose between two possible outcomes for each item in the iterable. It’s a useful feature for cases where we need to apply different transformations or labels to the element...
if yes, is y divisible by 5 or not. If y satisfies both conditions, the number appends to num_list. Example: List Comprehension with String We can also use list comprehension with iterables other than lists. word = "Python" vowels = "aeiou" # find vowel in the string "Python" resul...
if_else_list = [x ** 3 if x%2 == 0 else x+3 for x in range(10)] print(if_else_list) 1. 2. 输出结果: [0, 4, 8, 6, 64, 8, 216, 10, 512, 12] 1. 1.6 包含两个if语句的列表推导式 1.6.1示例代码: double_list = [x**2 for x in range(10) if x % 2==0 if x...
我们也可以用map加上lambda实现上述List Comprehension的功能: my_list = map(lambdaa: a*a, numbers) 上面三个代码段的功能类似,除了map函数返回的是iterator,但是从可读性来说,List Comprehension是最好的 (二)一些较为复杂的List Comprehension (1)加上if判断条件的List Comprehension: my_list = [numberfornu...
就是把生成list的循环写成一句话,外边用中括号 例子来啦 求10以下的偶数 print([xforxinrange(10)ifx % 2 == 0]) 输出:[0, 2, 4, 6, 8] 栗子也来啦 从数据库返回中获取列名 tuple1=(("name",1,1),("age",1,2),("class",1,3)) ...
ExampleGet your own Python Server fruits = ["apple","banana","cherry","kiwi","mango"] newlist = [] forxinfruits: if"a"inx: newlist.append(x) print(newlist) Try it Yourself » With list comprehension you can do all that with only one line of code: ...
2. 可选:在for循环后面可以使用if语句进行过滤。 3. 在for循环前定于列表的元素表达式,可以是任意的表达式。可以是for循环中的元素本身,也可以是元素进行运算后的结果,也可以是元素组成的元祖或者列表,可以是一个函数,甚至可以是另一个列表解析式(嵌套列表解析式)。 4. 可选:在for循环后面可以再嵌套for循环。
2. Using List Comprehension with a Condition We can also include conditions inside list comprehensions to filter elements. </> Copy # Generating a list of even numbers from 1 to 10even_numbers=[xforxinrange(1,11)ifx%2==0]# Printing the resultprint("Even numbers:",even_numbers) ...
用list comprehension来写: pre_2000 = [title for (title, year) in movies if year < 2000] 例五[expr for var in [a, b, c]] 有一个向量v_1 = [a, b, c],根据空间解析几何4v_1 = v_2, v_2应该是[4*a, 4*b, 4*c],要求用python 写出v_2 ...
Python list comprehension- A concise way to create a list from another sequence in a single line. Python enumerate() function- Adds a counter (index by default) to a list. Before we wrap up, let’s put your knowledge of Python list to the test! Can you solve the following challenge?