参考：https://zhuanlan.zhihu.com/c_1216656665569013760
----------------------------------------------------------
for num in range(100,1000):
low = num%10
mid = num // 10 % 10
high = num //100
if ( num == (low ** 3 + mid ** 3 + high ** 3)):
print(num)
正整数的反转
num = int (input ('num='))
reversed_num = 0
while (num > 0):
reversed_num = reversed_num*10 + num%10
num//=
print (reversed_num)
from random import randint
money = 100
while (money > 0):
print(f'你的总资产为:{money}元')
go_on = False
while True:
debt = int(input('请下注'))
if 0 < debt <=money:
break
first = randint(1,6) + randint(1,6)
print(f'\n玩家摇出了{first}点')
if first ==7 or first == 11:
print('玩家胜!\n')
money+=debt
elif first == 2 or first == 3 or first ==12:
print('庄家胜!\n')
money-=debt
else:
go_on=True
import random
ALL_CHARS = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
def gengerate_code(code_len=4):
code = ''
for _ in range(code_len):
index = random.randrange(0,len(ALL_CHARS))
code += ALL_CHARS[index]
return code
for _ in range(0,10):
print(gengerate_code(10))
返回给定文件的文件后缀名
def get_suffix(filename):
pos = filename.rfind('.')
return filename[pos+1:] if pos > 0 else ''
print(get_suffix('abc.txt'))
print(get_suffix('asas.pdf'))
print(get_suffix('.readme'))
print(get_suffix('readme.'))
from os.path import splitext
???
def get_suffix(filename):
return splitext(filename)[1][1:]
回马灯
import os
import time
content = '北 京 欢 迎 你 为 你 开 天 辟 地 '
i = int(0)
while True:
os.system('clr')
print(content)
time.sleep(0.2)
content = content[1:] + content[0]
i +=1
if (i==50):
break
from random import randint
a1 = 0
a2 = 0
a3 = 0
a4 = 0
a5 = 0
a6 = 0
for i in range(1,6001):
a = randint(1,7)
if (a==1):
a1 += 1
elif (a==2):
a2 +=1
elif (a==3):
a3 += 1
elif (a==4):
a4 +=1
elif (a==5):
a5 +=1
else:
a6 +=1
print('a1=%06d'%a1)
print('a2=%06d'%a2)
print('a3=%06d'%a3)
print('a4=%06d'%a4)
list_1 = [1,2,3,1,2,2,3,3442,313,131313,44,23245]
print(list_1)
list_2 = list(range(1,10))
print(list_2)
list_3 = list('shit!!')
print(list_3)
list_a = ['apple','tree','list']
for index in range(len(list_a)):
print(list_a[index])
import random
c = [0]*6
for _ in range(6000):
a = random.randint(1,6)
c[a-1] += 1
for i in range(0,6):
print(c[i])
笔记：
1 . r'xxx' f'xxx'
https://www.cnblogs.com/poloyy/p/12444579.html
https://www.runoob.com/python/att-string-format.html
例子：1-1 print(r' xx{1}xx{2}------{0} '.format("hhh","222222222","3ccc3"))
1-2 print ('myqq={myqq},myVX={myvx}'.format(myqq="23121235",myvx="FACKYOU"))
1-3 通过字典设置参数
site = {"name":"比起古","qq":"110"}
print("姓名：{name},qq:{qq}".format(**site))
1-4 this_list = ['高手教程','不言而喻','一目了然']
print('{0[1]}.....{0[0]}......{0[2]}'.format(this_list))
2 随机数
from random import randint
a = randint(1,6) + randint(1,6)
3 常用的内置函数：
a = abs(-12.23)
print(a)
a = bin(123)
print(a)
chr--orf hex oct
a = pow(2,3)
a = round(1.23546798,3)
a = sum(range(1,101))
4 字符串
4-1 : print函数中的end=''表示输出后不换行，即将默认的结束符\n（换行符）更换为''（空字符）。
例子 ：print('123',end='')
print('456')
4-2:
a = '''
你是一只狗
` ，你是一只猪，
你 喜欢睡觉
'''
print(a)
4-3 : a = '1213'
b = a[:]
print(b)
4-4 : a = 'abcdefg'
print(a[0],a[-2])
a = '123456789'
b = a[:]
c = a[::-1]
print(c)
4-5 :1 循环 1 s = 'fuck you !!!'
for index in range(len(s)):
print(s[index],end='')
2 s = 'fuck you !!!'
for ch in s:
print(ch)
2 字符串的方法
2-1
s1 = 'hello world'
print(s.capitalize())
print(s.title())
print(s.upper())
s2 = 'abcdeee'
print(s2.lower())
2-2 查找
s = 'i will kill you'
print(s.find('kill'))
print(s[7])
print(s.index('kill'))
print(s.find('zzzz'))
print(s.find('l'))
print(s.index('zz'))
2-3 以..开头/结尾 ，由..组成
s = 'i love china'
print(s.startswith('ss'))
print(s.startswith('i'))
print(s.endswith('xxx'))
print(s.endswith('a'))
s1 = 'abc88888'
print(s1.isdigit())
print(s1.isalpha())
print(s1.isalnum())
2-4 对齐
s1 = 'i have an apple'
print(s1.center(20,'*'))
print(s1.rjust(20))
print(s1.ljust(20),'~~')
2-5 保留小数
a = 3.15656
print('%12.2f'%a)
+.2f 带符号保留二位
.0f 不带小数
b = 456
b = str(b)
print(b.rjust(6,'0'))
b = int(b)
print('%06d'%b)
2-6 修剪操作
e_m = ' [email protected] \n\t'
print(e_m.strip())
print(e_m.lstrip())
print(e_m.rstrip())
5 列表
5-1 插入，添加，删除
item = ['we','are','the']
item.append('children')
item.insert(1,'two')
item.remove('the')
item.pop()
del item[1]
print(item)
5-2 ： 查找出现次数
item = ['techno','edm','trance','trance']
print(item.index('trance'))
print(item.index('edm',1))
print(item.count('techno'))
5-3 : 排序，反转
items = ['who','are','you','bay']
items.sort()
print(items)
items.reverse()
print(items)
5-4 : 列表生成
items = [x for x in range(1,10)]
items_2 = [x for x in 'i dont know english' if x not in 'abc']
print(items)
print(items_2)
5-5 : 嵌套列表
嵌套的正确做法-->
scores = [[0]*3 for _ in range(5)]
scores[0][0] = 95
print(scores)
6 元祖
tuple_1 = (1,2,3,4,2,2)
print(type(tuple_1))
tuple_2 = ('yuanzu',2,'really?','4')
print(type(tuple_2))
print(tuple_2)
tuple_2 +=tuple_1
print('-------',tuple_2)
print(tuple_1[2:])
用途 ： 打包，解包
a = 1,10,100
print(a,type(a))
z,x,c=a
print(z+x+c)
print(type(z))
b = z,x,c
print(type(b))
其他 ；
a = (1,10,12,14,13,12412,123123)
z,x,*c = a
print(c)
a = 3
b = 2
a,b = b,a
print(a,b)
让函数返回多个值
def find_max_min(items):
max_ = items[0]
min_ = items[0]
for item in items:
if max_ < item :
max_ = item
if min_ > item :
min_ = item
return max_,min_
items = [22,43,13,12,23,13,32424,13,13,13,24]
a = find_max_min(items)
print(a)
复习 ： scores = [[0]*3 for _ in range(5)]
names = ['关羽','张飞','赵云','马超','黄忠']
course = ['语文','数学','英语']
scores = [[0]*len(course) for _ in range(len(names))]
for i,name in enumerate(names):
print(f'请输入{name}的成绩')
for j,course in enumerate(course):
scores[i][j] = float(input(f'{course}:'))
7 集合 （无序性，互异性）
set1 = {1,2,3,2,3}
print(set1)
set2 = set('hello')
print(set2)
for i in set1:
print(i)
print(5 in set1)
7-1 交集，并集，差集
set1 = {1,2,3,4,5,6,7}
set2 = {1,2,3}
print(set1 & set2)
print(set1.intersection(set2))
print(set1 | set2 )
print(set1.union(set2))
print(set1 - set2)
print(set1.difference(set2))
print(set1 ^ set2)
set1 = {1, 3, 5}
set2 = {1, 2, 3, 4, 5}
set3 = set2
print(set1 < set2, set1 <= set2)
print(set2 < set3, set2 <= set3)
print(set1.issubset(set2))
print(set2.issuperset(set1))
print(set2 > set1)
8 字典
txt = {'name':'van','age':65,'dgree':111}
txt1 = dict(name = 'van',age = '65')
txt2 = dict(zip('abcd','1234'))
txt3 = dict(zip('abcd',range(1,10)))
for i in txt:
print(i)
print(txt[i])
print(f'{i}:{txt[i]}')
print(len(txt))
8-1 嵌套的字典
students = {
6001:{ 'name':'大撒币','age':996,'work':'搬砖' },
6002:{'name':'二狗子','age':123,'work':'睡觉'},
6003:{'name':'猴子','age':22,'work':'爬'}
}
print(students.get(6001))
print(students.keys())
print(students.values())
print(students.items())
对其进行遍历
for key,value in students.items():
print(key,'--->',value)
使用pop方法删除对应键值对并返回该值
stu2 = students.pop(6002)
使用popitem方法删除字典中最后一组键值对并返回对应的二元组
如果字典中没有元素，调用该方法将引发KeyError异常
key,value = students.popitem
使用setdefault更新
result = students.setdefault(6004,{'name':'fuck'})
print(result)
print(students.get(6004))
updata 更新
others = {
1002:{'name':'none','age':0},
6001:{'name':'get out'}
}
students.update(others)
print(students)
