python---依葫芦画瓢之set集合

#! /usr/bin/env python
#coding=utf-8
#三元运算
‘‘‘
result = 8 if 5 < 4 else 9
print result # 9

result = 8 if 5 > 4 else 9
print result # 8
‘‘‘
# 数据库中原有
old_dict = {
    "#1": {‘hostname‘: ‘c1‘, ‘cpu_count‘: 2, ‘mem_capicity‘: 80},
    "#2": {‘hostname‘: ‘c1‘, ‘cpu_count‘: 2, ‘mem_capicity‘: 80},
    "#3": {‘hostname‘: ‘c1‘, ‘cpu_count‘: 2, ‘mem_capicity‘: 80},
}

# cmdb 新汇报的数据
new_dict = {
    "#1": {‘hostname‘: ‘c1‘, ‘cpu_count‘: 2, ‘mem_capicity‘: 800},
    "#3": {‘hostname‘: ‘c1‘, ‘cpu_count‘: 2, ‘mem_capicity‘: 80},
    "#4": {‘hostname‘: ‘c2‘, ‘cpu_count‘: 2, ‘mem_capicity‘: 80},
}
s1 = set(old_dict)
s2 = set(new_dict)
#print s1
#print "_______________________________"
#print s2
‘‘‘set([‘#3‘, ‘#2‘, ‘#1‘])
_______________________________
set([‘#3‘, ‘#1‘, ‘#4‘])‘‘‘

def add(self, *args, **kwargs):  # real signature unknown
    """
    Add an element to a set，添加元素

    This has no effect if the element is already present.
    """
    pass
‘‘‘
s1.add(‘#5‘)
print s1

#set([‘#3‘, ‘#2‘, ‘#1‘, ‘#5‘])‘‘‘

def clear(self, *args, **kwargs):  # real signature unknown
    """ Remove all elements from this set. 清除内容"""
    pass
‘‘‘s1.clear()
print s1
#set([])
‘‘‘
def copy(self, *args, **kwargs):  # real signature unknown
    """ Return a shallow copy of a set. 浅拷贝  """
    pass
‘‘‘
print s1.copy()
#set([‘#3‘, ‘#2‘, ‘#1‘])
‘‘‘
def difference(self, *args, **kwargs):  # real signature unknown
    """
    Return the difference of two or more sets as a new set. A中存在，B中不存在

    (i.e. all elements that are in this set but not the others.)
    """
    pass
‘‘‘
s1 = set([‘#3‘, ‘#2‘, ‘#1‘])
s2 = set([‘#3‘, ‘#1‘, ‘#4‘])
print s1.difference(s2)
#set([‘#2‘])
‘‘‘
def difference_update(self, *args, **kwargs):  # real signature unknown
    """ Remove all elements of another set from this set.  从当前集合中删除和B中相同的元素"""
    pass
‘‘‘
s1 = set([‘#3‘, ‘#2‘, ‘#1‘])
s2 = set([‘#3‘, ‘#1‘, ‘#4‘])
s1.difference_update(s2)
print s1
#set([‘#2‘])
‘‘‘
def discard(self, *args, **kwargs):  # real signature unknown
    """
    Remove an element from a set if it is a member.

    If the element is not a member, do nothing. 移除指定元素，不存在不保错
    """
    pass
‘‘‘
s1.discard(‘#2‘)
print s1
#set([‘#3‘, ‘#1‘])
‘‘‘
def intersection(self, *args, **kwargs):  # real signature unknown
    """
    Return the intersection of two sets as a new set. 交集
    (i.e. all elements that are in both sets.)
    """

    pass
‘‘‘
s3 = s1.intersection(s2)
print s3
#set([‘#3‘, ‘#1‘])
‘‘‘
def intersection_update(self, *args, **kwargs):  # real signature unknown
    """ Update a set with the intersection of itself and another.  取交集并更更新到A中 """
    pass
‘‘‘
s1.intersection_update(s2)
print s1
#set([‘#3‘, ‘#1‘])
‘‘‘
def isdisjoint(self, *args, **kwargs):  # real signature unknown
    """ Return True if two sets have a null intersection.  如果没有交集，返回True，否则返回False"""
    pass
‘‘‘
print s1.isdisjoint(s2)
#False
‘‘‘

def issubset(self, *args, **kwargs):  # real signature unknown    """ Report whether another set contains this set.  是否是子序列"""    pass‘‘‘print s1.issubset(s2)#False‘‘‘def issuperset(self, *args, **kwargs):  # real signature unknown    """ Report whether this set contains another set. 是否是父序列"""    pass‘‘‘print s1.issuperset(s2)#False‘‘‘def pop(self, *args, **kwargs):  # real signature unknown    """    Remove and return an arbitrary set element.    Raises KeyError if the set is empty. 移除元素    """    passdef remove(self, *args, **kwargs):  # real signature unknown    """    Remove an element from a set; it must be a member.    If the element is not a member, raise a KeyError. 移除指定元素，不存在保错    """    passdef symmetric_difference(self, *args, **kwargs):  # real signature unknown    """    Return the symmetric difference of two sets as a new set.  对称差集    (i.e. all elements that are in exactly one of the sets.)    """    pass‘‘‘print s1.symmetric_difference(s2)#set([‘#2‘, ‘#4‘])‘‘‘def symmetric_difference_update(self, *args, **kwargs):  # real signature unknown    """ Update a set with the symmetric difference of itself and another. 对称差集，并更新到a中 """    passdef union(self, *args, **kwargs):  # real signature unknown    """    Return the union of sets as a new set.  并集    (i.e. all elements that are in either set.)    """    pass‘‘‘print s1.union(s2)#set([‘#3‘, ‘#2‘, ‘#1‘, ‘#4‘])‘‘‘def update(self, *args, **kwargs):  # real signature unknown    """ Update a set with the union of itself and others. 更新 """    pass‘‘‘s1.update(s2)print s1#set([‘#3‘, ‘#2‘, ‘#1‘, ‘#4‘])‘‘‘print "删除" + str (s1.difference(s2))print "新建" + str (s2.difference(s1))print "更新" + str (s1.intersection(s2))

python---依葫芦画瓢之set集合

原文：http://www.cnblogs.com/longqihui/p/6523190.html