Python学习Day10

距离上一次学习Python过去了十天，被老师召唤去了了解了weka的一些知识
今天主要是完成了之前弄到一半的数值统计的代码；
字典类型的数据的定义、函数以及操作；
第三方库jieba库的安装以及jieba库的三种模式及对应的函数的应用。

'''def getNum():
    num=[]
    iNumStr=input("Please input a number:")
    while iNumStr!="":
        num.append(eval(iNumStr))
        iNumStr = input("Please input a number:")
    return num
def mean(numbers):
    s=0.0
    for num in numbers:
        s+=num
    return s/len(numbers)
def dev(numbers,mean):
    sdev=0.0
    for num in numbers:
        sdev+=(num-mean)**2
    return pow((sdev/len(numbers)-1),0.5)
def medain(numbers):
    sorted(numbers)
    size=len(numbers)
    if size%2==0:
        med=(numbers[size//2-1]+numbers[size//2])/2
    else:
        med=numbers[size]/2
    return med
n=getNum()
m=mean(n)
print("The mean is:{},The dev is:{},The medain is:{}".format(mean(n),dev(n,m),medain(n)))
'''

'''#Dictionary
d={"China":"Beijing","American":"Washington","United Kindom":"London"}
print(d.keys())
print(d.values())
print(d.items())
d["Janpan"]="Tokyo"  #input an item into the dic
print(d.items())
print(d.get("China","Error"))
print(d.popitem())
print(len(d))
'''
#The Using of jieba
import jieba
s="*是一个伟大的国家"
print(jieba.lcut(s))#精确模式
print(jieba.lcut(s,cut_all=True))#全模式
print(jieba.lcut_for_search(s))#搜索模式