参考代码:
def dictf(number):
dict2={}
for i in range(1,number+1):
key=str(i)
value=i**2
dict2[key]=value
return dict2
number=int(input("请输入一个数字:"))
dictf(number)
参考代码:
import IPy
def is_ip(address):
try:
IPy.IP(address)
return "YES"
except Exception as e:
return "NO"
address = input("请输入IP:")
is_ip(address)
参考代码:
def check_code():
import random
checkcode = ''
for i in range(4):
current = random.randrange(0, 4)
if current != i:
temp = chr(random.randint(65, 90))
else:
temp = random.randint(0, 9)
checkcode += str(temp)
return checkcode
while True:
code = check_code()
print('验证码:',code)
v = input('>>>')
if v.lower() == code.lower():
print('验证码正确')
break
else:
print('验证码错误重新输入!')
参考代码:
input_str = input()
dimensions=[int(x) for x in input_str.split(',')]
rowNum=dimensions[0]
colNum=dimensions[1]
multilist = [[0 for col in range(colNum)] for row in range(rowNum)]
for row in range(rowNum):
for col in range(colNum):
multilist[row][col]= row*col
参考代码:
def fn(x):
return x ** 2
List = [1,2,3,4,5]
result_list = map(fn,List)
result_list = [ i for i in result_list if i > 10]
参考代码:
from sys import stdout
for i in range(1,1000):
sum = 0
for j in range(1,i):
if i%j == 0:
sum += o
if sum == i:
print(i)
参考代码:
import itertools
sum2=0
a=[1,2,3,4]
for i in itertools.permutations(a,3):
print(i)
sum2+=1
print(sum2)
参考代码:
import math
for i in range(100,200):
for j in range(2,round(math.sqrt(i))+1):
if i%j==0:
break
else:
print(i)
参考代码:
def Quick_Sort(list):
if len(list)<2:
return list
else:
mid_pivot = list[0]
less_before_midpivot = [i for i in list[1:] if i<=mid_pivot]
bigger_after_pivot = [i for i in list[1:] if i > mid_pivot]
finally_list = Quick_Sort(less_before_midpivot)+[mid_pivot] + Quick_Sort(bigger_after_pivot)
return finally_list
参考代码:
import math
for i in range(100,200):
flag=0
for j in range(2,round(math.sqrt(i))+1):
if i%j==0:
flag=1
break
if flag:
continue
print(i)
参考代码:
import math
import random
def shuffle(list):
counter = len(list)
# while there are elements in the list
while counter > 0:
# pick a random index
index = math.floor(random.random()*counter)
# Decrease counter by 1
counter = counter -1
# And swap the last element with it
temp = list[counter]
list[counter] = list[index]
list[index] = temp
return list
参考代码:
def spread(arg):
ret = []
for i in arg:
if isinstance(i, list):
ret.extend(i)
else:
ret.append(i)
return ret
def deep_flatten(lst):
result = []
result.extend(
spread(list(map(lambda x: deep_flatten(x) if type(x) == list else x, lst))))
return result
参考代码:
import re
email_list= ["test01@163.com","test02@163.123", ".test03g@qq.com", "test04@gmail.com" ]
for email in email_list:
ret = re.match("[\w]{4,20}@(.*)\.com$",email)
if ret:
print("%s 是符合规定的邮件地址,匹配后结果是:%s" % (email,ret.group()))
else:
print("%s 不符合要求" % email)
参考代码:
def reverse_int(x):
if not isinstance(x, int):
return False
if -10 < x < 10:
return x
tmp = str(x)
if tmp[0] != '-':
tmp = tmp[::-1]
return int(tmp)
else:
tmp = tmp[1:][::-1]
x = int(tmp)
return -x
reverse_int(-23837)
参考代码:
def dedupe(items, key = None):
seen = set()
for item in items:
val = item if key is None else key(item)
if val not in seen:
yield item
seen.add(val)
参考代码:
from glob import iglob
def func(fp, postfix):
for i in iglob(f"{fp}/**/*{postfix}", recursive=True):
print(i)
if __name__ == "__main__":
postfix = ".txt"
func("F:\\", postfix)
参考代码:
class Node(object):
def __init__(self, data=None, next=None):
self.data = data
self.next = next
link = Node(1, Node(2, Node(3, Node(4, Node(5, Node(6, Node(7, Node(8, Node(9)))))))))
def rev(link):
pre = link
cur = link.next
pre.next = None
while cur:
tmp = cur.next
cur.next = pre
pre = cur
cur = tmp
return pre
root = rev(link)
while root:
print root.data
root = root.next
参考代码:
import time
def wrapper(func):
def inner():
start_time = time.time()
func()
print("程序运行时间:",time.time() - start_time)
return inner
@wrapper
def test():
time.sleep(2)
参考代码:
from functools import wraps
import logging
def logged(level, name = None, message = None):
def decorate(func):
log_name = name if name else func.__module__
log = logging.getLogger(log_name)
log_msg = message if message else func.__name__
@wraps(func)
def wrapper(*args, **kwargs):
log.log(level, log_msg)
return func(*args, **kwargs)
return wrapper
return decorate
参考代码:
import heapq
class PriorityQueue:
def __init__(self):
self._queue = []
self._index = 0
def push(self, item, priority):
heapq.heappush(self._queue, (-priority,self._index, item))
self._index += 1
def pop(self):
return heapq.heappop(self._queue)[-1]
class Item:
def __init__(self):
self.name = name
def __repr__(self):
return 'Item({!r})'.format(self.name)
参考代码:
def fact(j):
sum = 0
if j == 0:
sum = 1
else:
sum = j * fact(j - 1)
return sum
参考代码:
# 首先定义一个抽象基类
class CarStore(object):
# 定义生产汽车的方法
def createcar(self, name):
pass
# 根据类型去生产车
def order(self, name):
self.car = self.createcar(name)
self.car.move()
# 定义4s店 实现抽象类
class AoDiCarStore(CarStore):
def createcar(self, name):
self.factory = CarFactory()
return self.factory.createcar(name)
# 创建一个车
class AoDi():
def move(self):
print('移动')
# 定义一个工厂
class CarFactory():
def createcar(self, name):
self.name = name
if self.name == 'AoDi':
self.car = AoDi()
return self.car
aodi = AoDiCarStore()
aodi.order('AoDi')
参考代码:
def binary_search(data, item):
n = len(data)
if n > 0:
mid = n // 2
if data[mid] == item:
return True
elif data[mid] > item:
return binary_search(data[:mid], item)
else:
return binary_search(data[mid+1:], item)
return False
参考代码:
class Solution:
def compareString(self, A, B):
if len(B) == 0:
return True
if len(A) == 0:
return True
trackTable = [ 0 for _ in range(26) ]
for i in A:
trackTable[ord(i) - 65] += 1
for i in B:
if trackTable[ord(i) - 65] == 0:
return False
else:
trackTable[ord(i) - 65] -= 1
return True
参考代码:
tmp_list = [8, 5, 1, 3, 2, 10, 11, 4, 12, 20]
def partition(arr,low,high):
i = ( low-1 )
pivot = arr[high]
for j in range(low , high):
if arr[j] <= pivot:
i = i+1
arr[i],arr[j] = arr[j],arr[i]
arr[i+1],arr[high] = arr[high],arr[i+1]
return ( i+1 )
def quicksort(arr,low,high):
if low < high:
pi = partition(arr,low,high)
quicksort(arr, low, pi-1)
quicksort(arr, pi+1, high)
quicksort(tmp_list, 0, len(tmp_list)-1)
print(tmp_list)