目录1、列表生成式2、生成器3、迭代器1、列表生成式
语法
a [func(i) for i in range(10)]
>>>a
>>>[0,1,2,3,4,5,6,7,8,9]应用场景 如何给列表[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]里的每个值加1呢?
一般做法,
>>> a
[0, 1,…
1.yield是放在函数里面的,且带有yield的函数就叫做生成器,这时函数就成了一个对象,而不能把它作为函数来对待
def foo(num):print("introduction:")while:if num < 10:num 1yield num
g foo()看上面的代码,我们把…
python格式化字符串fIn Python 3.6, a new feature for string formatting is introduced that is "Literal String Interpolation" also knows as "f-strings formatting". 在Python 3.6中,引入了用于字符串格式化的新功能,即“文字…
python3的列表生成式主要有3种:
for循环if ------- [i for i in xxx if x xxx]for循环if else --------- [i if exp1 else exp2 for i in xxx]多层for循环 ----------- [for i in xxx for j in xxx]
# 列表生成式1 for循环if
# [i for i in xxx if x xxx]
# 此处…
在第一次接触 Python 的时候,可能写过类似 for i in [2, 3, 5, 7, 11, 13]: print(i) 这样的语句。for in 语句理解起来很直观形象,比起 C 和 java 早期的 for (int i 0; i < n; i ) printf("%d\n", a[i]) 这样的语句,不知道简…
Recently I received an email from one of my readers asking me to write about Python’s complex topics such as Iterators, Generators, and Decorators. In this post, I’m going to cover the basics, implementation, and how to use them in your code.最近…
python 示例Python关键字 (Python keywords) Keywords are the reserved words in any programming language and their meanings/tasks are predefined, we cannot change their meanings. 关键字是任何编程语言中的保留字,它们的含义/任务是预定义的,我…