In the example, we transform the values into"even"and"odd"values using the list comprehension. $ ./infront.py ['even', 'odd', 'even', 'odd', 'even', 'odd', 'even'] Python list comprehension multiple if conditions It is possible to use multiple if conditions in the Python list co...
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" result = [char for char in word if char in...
简单理解就是 可以直接通过for循环生成一个list列表。 3.举例: list = [1,2,3,4,5,6,7,8,9]#打印列表中 所有元素的平方print[x**2forxinlist]#[1, 4, 9, 16, 25, 36, 49, 64, 81]#打印列表中 大于5的元素的平方 (只需要添加if语句即可)print[x**2forxinlistifx>5]#[36, 49, 64, 8...
Python list comprehension provides a shorter syntax than traditional loops. Conditions can be applied to filter elements. Python list comprehension supports nested structures and function calls.
很多时候我们需要创建一个满足特定要求的新列表,不得不用for循环来创建,而用列表推导式来表达只需要一行代码即可。列表推导式另一个优点是相比于for循环更高效,因为列表推导式在执行时调用的是Python的底层C代码,而for循环则是用Python代码来执行。比如我们需要创建一个包含平方数的列表,用for循环实现方式如下: ...
我们在上一章学习了“Lambda 操作, Filter, Reduce 和 Map”, 但相对于map, filter, reduce 和lamdba, Guido van Rossum更喜欢用递推式构造列表(List comprehension)。在这一章我们将会涵盖递推式构造列表(List comprehension)的基础功能。 递推式构造列表(List comprehension)是在Python 2.0中添加进来的。本质上,...
Set all values in the new list to 'hello': newlist = ['hello'forxinfruits] Try it Yourself » Theexpressioncan also contain conditions, not like a filter, but as a way to manipulate the outcome: Example Return "orange" instead of "banana": ...
Multiple If Conditions Now that you have understood how you can add conditions, it's time to convert the following for loop to a list comprehension with conditionals. divided = [] for x in range(100): if x%2 == 0 : if x%6 == 0: divided.append(x) Run code Powered By Be car...
列表推导式(List Comprehension)是Python中一种简洁而强大的语法,用于在创建列表的同时对其进行转换、过滤或进行其他操作。使用列表推导式可以大大提高代码的效率和可读性。 列表推导式的基本语法如下所示: 代码语言:python 代码 [expressionforiteminiterableifcondition] ...
Learn Python list comprehension, and its syntax and example, using if-else style conditions and writing nested list comprehensions involving two lists.