# coding=UTF-8

# 字体编码,coding必须在第一行

# 01

print("Hello World")

# 02

score = 77

if score >= 80:

print(score)

else:

print("分数过低")

# 03

# rang(1,6), 不包含6

# for i in range(1, 6):

# print(i ** 2)

# 04

# while True:

# i = input("请输入内容:")

# if i == "stop":

# break

# elif not i.isdigit():

# if i.isspace():

# print("不能输入空格")

# else:

# print("请输入数字")

#

# else:

# j = int(i)

# if j > 20:

# print("输入的数字太大了")

# elif j < 10:

# print("输入的数字太小了")

# else:

# print("输入正确")

# 05 循环增加

# i = 1

# while True:

# if i >= 10:

# print("大于10,退出")

# break

# else:

# i = i + 1

# print(i)

# print("+1中...")

# 06 默认浏览器打开网页

# url = "https://www.baidu.com/"

# import webbrowser

#

# webbrowser.open(url)

# True

# 07 读取网页内容 python 2+版本

# import urllib2

#

# html = urllib2.urlopen(url)

# print(html.read())

# 08 访问网页

url = "https://blog.csdn.net/qq_33160790"

# import urllib.request

#

# req = urllib.request.Request(url)

# reqs = urllib.request.urlopen(req)

# data = reqs.read().decode("utf-8")

# print(data)

# 09 单独获取url,暂未成功

# from lxml import etree

# import requests

#

# req = requests.get(url)

# if req.status_code == requests.codes.ok:

# html = etree.HTML(req.text)

# hrefs = html.xpath('span[@class="link_title"]/a/@href')

# for href in hrefs:

# print(href)

result = False

if result:

print("true")

else:

print("false false")

# 10 多行注释

'''

这是多行注释，使用单引号。

这是多行注释，使用单引号。

这是多行注释，使用单引号。

'''

# 11 单行显示

x = "1"

y = "2"

print(x, y)

# 12 多变量赋值

a = b = c = 1

print(a, b, c)

a, b, c = 1, 2, "雄"

print(a, b, c)

# 13 list 列表

# 0 1 2 3 4 5 6 7 8

# 列表

list = ["a", "b", "c", "d", "e", 1, 2, 2, 2]

# 数组

tuple = ("1", "2", "3", "4", "a", "b")

# 包含1, 不包含3

print(list[1:3])

print(tuple[1:3])

print(list[2:])

print(tuple[2:])

# 2出现的次数

print(list.count(2))

print(tuple.count("2"))

# position=2

print(list[2])

print(tuple[2])

# 14 字典

tinydict = {'name': 'john', 'code': 6734, 'dept': 'sales'}

print("key=", tinydict.keys())

print("value=", tinydict.values())

print(tinydict.copy())

# 15 强转

x = 1

y = 1.0

print(float(x))

print(int(y))

# 16 判断值是否被包含在内

if x in tinydict:

print(True)

else:

print(False)

if "code" in tinydict:

print(True)

else:

print(False)

# 17 身份运算符

a = 10

b = 10

if a is b:

print(True)

else:

print(False)

# 18 循环 break与 continue区别

for tiny in tinydict:

print(tiny)

print("结束")

for letter in "python":

if letter == "h":

# 1 终止当前循环

# break

# 2 跳过当前值, 继续下一轮

continue

else:

print(letter)

# 19 while 循环

# 倒叙, 从16开始判断

numbers = [11, 12, 13, 14, 15, 16]

even = []

odd = []

while len(numbers) > 0:

number = numbers.pop()

if number % 2 == 0:

# 附加

even.append(number)

else:

odd.append(number)

print("偶数", even)

print("基数", odd)

numbers1 = [11, 12, 13, 14, 15, 16]

# [-2] 读取列表中倒数第二个元素

print("-2的位置=", numbers1[-2]) # 15

print("最大值=", max(numbers1))

del numbers1[2]

print("删除一个元素后:", numbers1)

# 20 math 方法

import math

i = math.pow(2, 3) # 2的3次方

print(i)

# 21 替换带有%s的符号

print("My name is %s and weight is %s kg! I'm %s" % ('Zara', 21, "beautiful"))

# 22 时间戳 年月日 时分秒

import time

print("当前时间为=", time.asctime(time.localtime(time.time())))

print("时间为:", time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()))

# 23 打印日历

import calendar

cal = calendar.month(2018, 9)

print(cal)

import datetime

now = datetime.datetime.now()

print("现在的时间是:", now)

# 24 方法

def enter(str, str2):

print(str, str2)

return

enter("我要调用enter方法", "参数2")

enter(1, "参数22")

# 25 lambda

# 后面的x-y才是运算式

sum = lambda x, y, z: x - y + z;

print("lambda相加=", sum(10, 20, 11))

print("lambda相加=", sum(20, 30, 12))

money = 100

def addMoney():

global money

money = money + 1

print(money)

addMoney()

print(money)

# content = dir(math)

# print(content)

# 异常捕获

try:

file1 = open("refile.txt", "w")

file1.write("我是测试数据")

except IOError:

print("写入异常")

else:

print("写入成功")

file1.closed

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