【Python】Python基础教程学习笔记1-202212

20221214-191
#双端队列
from collections import deque
q=deque(range(5))
a=range(5)
print(a)
print(type(a))
q.append(5)
print(q)
print(type(q))
q.appendleft(6)
print(q)
q.pop()
print(q)
q.popleft()
print(q)
q.rotate(3)#旋转
print(q)
q.rotate(-1)
print(q)

#time
import time

a=time.asctime()
print(a)
b=time.localtime()
print(b)
c=time.mktime(b)
print©
time.sleep(5)
print©
d=time.time()
print(d)

#####################################
20221212-189
#堆headq
from heapq import *
from random import shuffle
data=list(range(10))
shuffle(data)
heap=[]
for n in data:
heappush(heap,n)
heappush(heap,0.5)
print(heappop(heap))
print(heappop(heap))
print(heappop(heap))
print(data)
print(heap)

from heapq import *
from random import shuffle
head=[11,8, 6, 5, 4, 9, 1, 3, 2, 7, 0]
print(head)
heapify(head)
print(head)
heapreplace(head,0.5)
print(head)
heapreplace(head,12)
print(head)
#####################################
20221212-187
#集合-运算
#并a.union(b) a|b
a={1,2,3,7,8}
b={4,2,3}
c=a.union(b)
d=a|b
print(‘a.union(b)=’,c)
print(‘a|b=’,d)
#交a.union(b) a|b
e=a&b
f=a.issubset(b)
g=b.issubset©
print(‘a&b=’,e)
print(‘a.issubset(b)’,f)
print(‘b.issubset©’,g)
print(‘c<=a’,c<=a)
print(‘c>=a’,c>=a)
h=c.issuperset(b)
print(‘c.issuperset(b)=’,h)
G=c.issuperset(a)
print(‘c.issuperset(a)=’,G)
print(‘a-b=’,a-b)
print(‘a&b=’,a&b)
print('a^b=',ab)
#####################################
20221209-187
#集合
a=set(range(10))
print(‘a=’,a)
print(‘type_a=’,type(a))
b=range(10)
print(‘b=’,b)
print(‘type_b=’,type(b))
#####################################

啊，没看明白，运行没报错
10.3-186
#####################################
import fileinput
for line in fileinput.input(inplace=True):
line=line.rstrip()
num=fileinput.lineno()
print(‘{:<50}#{:2d}’).format(line,num)
#####################################

[1]: Python rstrip() 删除 string 字符串末尾的指定字符，默认为空白符，包括空格、换行符、回车符、制表符。