3)把list return回来 return [iforiinrange(1, 101)] 没错这样你就通过list comprehension构成了一个1到100所有数字的list FOR LOOP with CONDITION 又是一枚栗子 如果我们想要create一个list让它里面每一个元素是1-100所有奇数的平方的话会怎么做? 还是分析下算法 1)空的list 2)循环1到100 3) 挑选出符合...
A list comprehension is an expression that creates a list by iterating over another container.A basic list comprehension:[i*2 for i in [1, 5, 10]]Output: [2, 10, 20]List comprehension with if condition:[i*2 for i in [1, -2, 10] if i>0]...
Basic list comprehension numbers=[1,2,3,4,5]squares=[num**2fornuminnumbers]print(squares) Output: [1,4,9,16,25] List comprehension with if condition fruits=['apple','banana','cherry','kiwi','mango']new_list=[fruitforfruitinfruitsif'a'infruit]print(new_list) ...
Note that this actually uses a different language construct, a conditional expression, which itself is not part of the comprehension syntax, while the if after the for…in is part of list comprehensions and used to filter elements from the source iterable. Conditional expressions can be used in ...
years=[['January','February','March'],['April','May','June'],['July','August','September'],['October','November','December']]# Nested List comprehension with an if conditionyears=[yearsforsublistinyearsforyearsinsublistiflen(years)<=5]print(years) ...
在Python中,列表理解(List Comprehension)是一种非常便捷的创建列表的方式。通过使用列表理解,您可以更加简洁快速地创建列表,并且减少代码的冗余度。 基本语法 列表理解的基本语法如下: new_list = [expression for item in iterable if condition] 其中,expression表示在迭代过程中对每个元素所执行的操作,item表示每个元...
With list comprehension you can do all that with only one line of code: Example fruits = ["apple","banana","cherry","kiwi","mango"] newlist = [xforxinfruitsif"a"inx] print(newlist) Try it Yourself » The Syntax newlist = [expressionforiteminiterableifcondition==True] ...
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1.List Comprehension / Generator 表达式 我们来看一个简单的例子。如果你想将一个数组转换为另一个数组: result = []for item in item_list:new_item = do_something_with(item)result.append(item) 如果你喜欢 MapReduce,你也可以使用 map,或者 Python 中的 List Comprehension: ...
Filtering with list comprehensions: List comprehensions can include an if condition to filter items from the iterable. Example 2: Filtering Even Numbers This example demonstrates how to filter even numbers using a list comprehension. Code: # Create a list of even numbers from 0 to 9evens=[xfor...