tuple 元组(创建后不能修改)
tuple = "cat","dog","tiger","human"
print(tuple)def fun(x):
return x,x*2print(type(fun(3)))for x,y in ((2,0),(2,5),(3,8)):
print(x+y)
set 集合
S = {435,"BAT",(25,"CS"),435}
print(S)W = set("apple")
print(W)V = set(("cat",4,"apple"))
print(V)
list 列表
ls = [423,"BAT",[10,"CS"]]
print(ls[2][1][1])vlist = list(range(5))
print(vlist)print("YES") if 2 in vlist else print("NO")lss = [52,36,95,78]
print(sorted(lss))
print(lss)
字典
sets = {23,35}
print(type(sets))
setss = {34:23,33:22,23:32}for a in setss.keys():
print(a)ls = setss.items()
print(ls)for key in setss:
print(setss[key])
计算平均数,和标准差
import mathdef inputs() :
nums = []
x = input()
while x != "":
nums.append(int(x))
x = input()
return numsls = inputs()
print(ls)def mean(numbers):
s = 0
for num in numbers:
s += num
return s / len(numbers)def dev(numbers,means):
sdev = 0
for num in numbers:
sdev += (num-means)**2
return math.sqrt(sdev/(len(numbers)-1))print(dev(ls,mean(ls)))
统计词频(哈利波特1)
txt = open("1.Harry Potter and the Sorcerer's Stone.txt","r").read()
txt = txt.lower()for ch in '",!-?;.`':
txt = txt.replace(ch," ")
#print(txt)ls = txt.split()
print(ls)maps = {}
for str in ls:
maps[str] = maps.get(str,0) + 1item = list(maps.items())cnt = 1
for a in item :
print(a,end=" ")
if cnt % 10== 0:
print("")
cnt+=1
print("")item.sort(key=lambda x:x[1],reverse=True)for i in range(10):
word ,count = item[i]
print(word,count)