- python追求的是最后的解决方案，相比其他语言是追求多种方案
- 不需要管理内存之类的细节
- 有丰富的库
- 使用Python搭建网站，后台服务比较容易维护，新增功能也容易实现---YouTube，知乎，豆瓣
- 自动化运维：强大的开发工具和完整的工具链，批量处理任务
- 数据分析师：快速开发的特性让你迅速验证你的想法
- 游戏开发者：热更新
- 自动化特性：Python是目前比较流行的script
- 网站开发：丰富的django，flask框架，设计模板bootstrap,能适配移动端
- 爬虫或处理大量信息
- 包装其他语言的程序：混合编译其他语言的库
下载参考这里
廖雪峰
python下载
IDE下载Pycharm
Pycharm快速上手视频
官方文档
#coding:utf-8
what_he_dose = ' plays '
his_instrument = 'guitar'
his_name = 'Robert Johnson 帅哥'
artist_intro = his_name + what_he_dose +his_instrument
print(artist_intro)
print(type(artist_intro))
num = 1
string = '2'
num2 = int(string)
print(num+num2)
word = ('words' * 3 +' ') * 2
print(word)
word = 'a loooong word'
num = 12
string = 'bang! '
total = string * (len(word) - 12)
print(total)
name = 'My name is Tank'
print(name[0])
print(name[-4]) #倒数第四个
print(name[11:15])
print(name[1:])
print(name[:6])
# \ 表示换行 直接敲回车
word = 'frass' \
'sdsdsd' \
'sdsdssd' \
'sdsddsdsds'
url = 'https://www.baidu.com/sdsddfsgraeee244dadsad.jpg'
file_name = url[-10:]
print(file_name)
phone_number = '15077123276'
hiding_number = phone_number.replace(phone_number[:7],"*" * 9)
print(hiding_number)
search = '168'
num_a = '1386-168-0006'
num_b = '1681-222-0006'
print(search + ' is at ' + str(num_a.find(search)) + ' to ' + str(num_a.find(search) + len(search)) + ' of num_a')
print('{} a word she can get what she {} for'.format('came','with'))
print('{prepostation} a word she can get what she {sufixx} for'.format(prepostation ='came',sufixx = 'with'))
city = input("write down the name 偶发city \n")
url = "http://www.baidu.com/city={}".format(city)
print(url)
计算词频
import string
path = '/Users/JayLee/Desktop/screenshort/Walden.txt'
with open(path) as text:
words = [ raw_word.strip(string.punctuation).lower() for raw_word in text.read().split()] #去除标点符号
words_index = set(words) #去重
couts_dict = {index:words.count(index) for index in words_index} #单词为key 出现的个数为value
# print(couts_dict)
for word in sorted(couts_dict,key = lambda x: couts_dict[x],reverse=True): #出现的个数来做排序
print('{} -- {}times'.format(word,couts_dict[word]))
- class定义
缩进很重要，已缩进来表示语句的结束
class Car:
formula = ['wheel','enqine','glasss']
def drive(self):
print('wowowowow~~@!')
my_car = Car()
# print(my_car.formula)
#
# for elemnt in my_car.formula:
# print(elemnt)
my_car.local_log = 'LOMO' #动态创建属性
print(my_car.local_log)
my_car.drive()
随机生成姓名
考察 yield 的用法
ln_path = '/Users/JayLee/Desktop/screenshort/last_name.txt'
fn_path = '/Users/JayLee/Desktop/screenshort/first_name.txt'
fn = []
ln1 = []
ln2 = []
with open(fn_path,'r') as f:
for line in f.readlines():
fn.append(line.split('\n') [0]) #过滤\n
# print(fn)
with open(ln_path,'r') as f:
for line in f.readlines():
if len(line.split('\n')[0]) == 1:
ln1.append(line.split('\n')[0]) #单个字
else:
ln2.append(line.split('\n')[0]) #多个字
# print(ln1)
# print('=' * 70)
# print(ln2)
fn = tuple(fn) #元组比列表节省内存
ln1 = tuple(ln1)
ln2 = tuple(ln2)
# print(fn)
import random
class FakeUser:
def fake_name(self,amount = 1,one_word =False,two_word =False):
n = 0
while n <= amount:
if one_word:
full_name = random.choice(fn) + random.choice(ln1)
elif two_word:
full_name = random.choice(fn) + random.choice(ln2)
else:
full_name = random.choice(fn) + random.choice(ln1+ln2)
# print('full_name: '+full_name)
yield full_name
n +=1
def fake_gener(self,amount = 1):
n=0
while n <=amount:
gender = random.choice(['man','woman','unkown'])
yield gender
n +=1
class SnsUser(FakeUser):
def get_followers(self,amount = 1,few = False,a_lot = True):
n = 0
while n <= amount:
if few:
followers = random.randrange(1,50)
elif a_lot:
followers = random.randrange(200,10000)
yield followers
n+=1
user_a = FakeUser()
user_b = SnsUser()
for name in user_a.fake_name(30):
print(name)
for gender in user_b.fake_gener(20):
print(gender)
# user_a.fake_name(True)
# user_b.get_followers(few=True)
丰富的三方库
awesome-python
中文翻译官方文档
老齐github教程
www.runoob.com
