Python Built-in Function 学习笔记 1. 匿名函数 1.1 什么是匿名函数 python允许使用lambda来创建一个匿名函数,匿名是因为他不需要以标准的方式来声明,比如def语句1.2 匿名函数优点 节省内存:如果不把它赋值给一个变量的话,由于是匿名的,不用分配栈空间
map(function, iterable, ...):将函数对象依次作用于表的每一个元素。 max(iterable, *[, key, default]):返回可迭代对象中的最大值。 memoryview(obj):根据obj生成相应的memoryview对象。 min(iterable, *[, key, default]):返回可迭代对象中的最小值。 next(iterator[, default]):从对象中检索下一个ite...
- 集合:set() frozenset() - 方法:len() zip() all() any() iter() filter() next() sorted() reversed() enumerate() map() memoryview() 5、面向对象 setattr() getattr() delattr() hasattr() super() property() staticmethod() classmethod() isinstance() issubclass() 6、系统方法 dir() he...
'b': bytearray(b'dbc'), 'lamb': <function <lambda> at 0x00000000024E8730>, '__package__': None, 'st': frozenset({1, 2, 3, 4}), ... """ code = """ for i in range(5): print(i, end=" ") """ exec(code) # 运行代码 0 1 2 3 4 x = 1 print("eval:", eval(...
map()Returns the specified iterator with the specified function applied to each item max()Returns the largest item in an iterable memoryview()Returns a memory view object min()Returns the smallest item in an iterable next()Returns the next item in an iterable ...
10 between, in, rlike, regexp, ilike, like, is [not] [NULL, true, false], is [not] distinct from 11 and 12 or String and binary functions Expand table FunctionDescription expr1 || expr2 Returns the concatenation of expr1 and expr2. aes_decrypt(expr, key[, mode[, padding...
- 方法:len() zip() all() any() iter() filter() next() sorted() reversed() enumerate() map() memoryview() 5、面向对象 setattr() getattr() delattr() hasattr() super() property() staticmethod() classmethod() isinstance() issubclass() ...
function:函数 iterable:可迭代的 返回值: Python 2.x 返回列表。 Python 3.x 返回迭代器。 示例 iter1 = map(lambda x: x * 2, [1, 2, 3]) # 对序列每个元素乘以2 print(iter1) # print(next(iter1)) # 2 # 对两个序列相同位置的元素相乘 def square(x, y): return x * y iter1 = ...
MSPL defines the built-in functions described in the following table. 展开表 Function Description AddHeader Adds a header to the current SIP message. BeginFork Initializes a forking operation for the current message. CheckUserOption Indicates whether the user is enabled for a specified option. ...
15.我市将在下个月着手修建一座新桥.In our city,a new bridge will ___ ___ be built next month.VII.综合填空.阅读短文,用适当的单词填空完成短文(1×10分)My middle school's student rules are very s (1) ,but I think they are very good.O (2) the rules is everyone's duty.Rules ke...