字典排序，初始化，简单使用

如

想对字典wordhash排序：

通过list实现：wordlist

wordhash={'ufeff': 1, '作者': 8, '：': 114, 'Calvin': 1, 'Shi': 1, '链接': 1, 'www': 1, '.': 35, 'zhihu': 1, 'question': 1, '27068465': 1}
wordlist = [('ufeff', 1), ('Calvin', 1), ('Shi', 1), ('链接', 1), ('www', 1), ('zhihu', 1), ('question', 1), ('27068465', 1)]

item:item[1]代表是元组('Calvin', 1)中的第二个元素‘1’进行排序

reverse=False代表词频从小到大

    wordhash = {} 　　#字典的初始化
    wordhash = cipin(content)
    wordlist = sorted(wordhash.items(),key=lambda item:item[1],reverse=False) 
    for tuple in wordlist:
        word = tuple[0]
        print(word+'    '+str(wordhash[word]))

判断某个key是否在字典中

def cipin(content):
    wordhash = {}
    words = content.split()
    for word in words:
        if word in wordhash:
            wordhash[word] += 1
        else:
            wordhash[word] = 1
    return wordhash