Pickle translates almost any type of object into a string. pickle.dumps takes an object as a parameter and returns a string representation. Although the new object has same value as the old, it is not the same object. In other words, pickling and the…
pickling 和unpickling是什么? Pickle module accepts any Python object and converts it into a string representation and dumps it into a file by using dump function, this process is called pickling. While the processing of retrieving original Python objects…
基本数据类型补充: set 是一个无序且不重复的元素集合 class set(object): """ set() -> new empty set object set(iterable) -> new set object Build an unordered collection of unique elements. """ def add(self, *args, **kwargs): # real signature un…
/int整数/ 如: 18.73.84 每一个整数都具备如下功能: class int(object): """ int(x=0) -> int or long int(x, base=10) -> int or long Convert a number or string to an integer, or return 0 if no arguments are given. If x is floating point, the conversion tr…
site-packages/django/utils/functional.py def new_method_proxy(func): def inner(self, *args): if self_wrapped is empty: self._setup() return func(self._wrapped, *args) return inner class LazyObject(object): """ A wrapper for another class th…
class set(object): """ set() -> new empty set object set(iterable) -> new set object Build an unordered collection of unique elements. """ wjh=set([']) wjh.add(') wjh.add(') print(wjh) {'} set中元素是唯一的 def add(self, *args…
一.作用域 对于变量的作用域,执行声明并在内存中存在,该变量就可以在下面的代码中使用. if 1==1: name = 'wupeiqi' print name 二.三元运算 result = 值1 if 条件 else 值2 如#果条件成立,值1付给result否则值2付给result 如果条件为真:result = 值1如果条件为假:result = 值2 name = 'sb' if 1==1 else '2b' input = raw_input() result = '2b'…
