1.导入包、模块
from 包 import 模块
from 包.模块 import 函数
from 模块 import 函数
2.下载第三方,使用的源
豆瓣源:
pip install selenium -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
清华源:
pip install selenium -i https://pypi.tuna.tsinghua.edu.cn/simple --trusted-host pypi.tuna.tsinghua.edu.cn
指定版本:
pip install selenium == 3.14 -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
3.查看下载了哪些第三方库:pip list
卸载:pip uninstall selenium
4、yaml语言、yaml文件
#一个数据执行的用法
import yaml
with open("conf.yaml") as file1:
da=yaml.load(file1,Loader=yaml.FullLoader)
print(da)
#多组数据执行的用法:
import yaml
with open("conf.yaml") as file1:
da=yaml.load_all(file1,Loader=yaml.FullLoader)
for one in da:
print(one)
#字典转换成json
import yaml
import json
with open("conf.yaml") as file1:
da=yaml.load(file1,Loader=yaml.FullLoader)
print(json.dumps(da))
#yaml中列表写法,‘-’后面要有空格
- 2
- 4
- 5
#yaml中字典写法,冒号:后面要空两格,否则报错
name: Lily
cour: 23
#yaml的元组用法,‘-’后面要空格,前面要先加python/tuple说明
!!python/tuple
- ss
- jk
- 89
#yaml中 字典中插入列表
name: Lily
data:
- cour: english
- date: 20220415
- age: 90
#列表中套列表、套字典
- 323
- 21
-
name: lusi
-
- Perl
- Python
#多组数据一起读的方式,用“---”隔开
!!python/tuple
- fs
- df
---
class: 304
yeay: 23
---
name: Lily
data:
- cour: english
- date: 20220415
- age: 90
---
- 90
- 22