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, 81]#打印列表中 所有元素和元素*10组成的元祖print[(x,x*10)forxinlist]#[(1, 10), (2, 20), (3, 30), (4, 40), (5, 50), (6, 60)...
# A new list of even numbers from existing list containing numbers 0-9even_numbers=[xforxinrange(10)ifx%2==0]print(even_numbers)# [0, 2, 4, 6, 8]# If-else with list comprehensionlabels=["Even"ifx%2==0else"Odd"forxinrange(10)]print(labels)# Two Lists Comprehensionlist1=[1,...
列表推导式或者说列表解析式是一种非常简洁的创建列表的方式。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...
在Python里,递推式构造列表(List comprehension)是一种定义和创建列表的优雅方式,这些列表通常是有一些约束的集合,并不是所有案例的集合。 对于函数map(), filter(), 和reduce(),递推式构造列表(List comprehension)是一个完整的lambda替代者。对于大部分人们,递推式构造列表(List comprehension)的语法更容易被人们...
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...
It is possible to have multiple for loops in a Python list comprehension. multiple_for_loops.py #!/usr/bin/python a = [1, 2, 3] b = ['A', 'B', 'C'] c = [ str(i) + j for i in a for j in b] print(c) The example creates a Cartesian product of two lists. ...
Python List Comprehension List comprehension in Python provides a concise way to create lists. It allows generating a new list by applying an expression to each element in an iterable, such as a list, tuple, or range, in a single line of code. This method improves readability and performance...
【摘要】 Python里面有个很棒的语法糖(syntactic sugar),它就是 list comprehension ,可以方便的操作list, dict, set等数据结构。有人把它翻译成“列表推导式”,也有人翻译成“列表解析式”。名字听上去很难理解,但是看它的语法就很清晰了。虽然名字叫做 list comprehen... ...
newlist.append(x) print(newlist) Try it Yourself » 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]
从功能上看是map/filter的结合体，也能通过…列表解析式List Comprehension