# 危险!用户输入直接嵌入 SQLuser_input="admin'; DROP TABLE users--"query= f"SELECT * FROM users WHERE name = '{user_input}'" t-string 允许在渲染前转义或验证数据: template= t"SELECT * FROM users WHERE name = {user_input}"safe_query= sql_renderer(template)# 自动添加参数化处理 隐患2:...
#饼图#历届奥运会男女比例m_f_ration=data.drop_duplicates() m_f_ration=m_f_ration.groupby(by="Sex")["Sex"].count() m_f_ration=m_f_ration/m_f_ration.sum()*100sex_data=[zforzinzip(m_f_ration.index,m_f_ration)] pie=(Pie() .add('', sex_data,radius=["20%","55%"]) .s...
HTML 元素属性也可以通过脚本语言动态地覆盖或实现。 如下例所示,itemprop属性用于向元素添加属性,而data-*用于存储元素本身的本地数据: University of Helsinki Subject: Artificial Intelligence Data Science 当涉及到提取时,HTML 标签和属性是数据的主要来源。 请访问...
defget_blog():"""获取大屏第二、三列信息数据"""headers={'User-Agent':'Mozilla/5.0 (MSIE 10.0; Windows NT 6.1; Trident/5.0)','referer':'https: // passport.csdn.net / login',}base_url='https://blog.csdn.net/river_star1/article/list/'resp=requests.get(base_url+"1",headers=header...
drop drop_duplicates droplevel dropna dtypes duplicated empty eq equals eval ewm expanding explode ffill fillna filter first first_valid_index flags floordiv from_dict from_records ge get groupby gt head hist iat idxmax idxmin iloc index infer_objects info insert interpolate isin isna isnull items ...
from fletimport(Card,Column,Container,Icon,Image,ListTile,PopupMenuButton,PopupMenuItem,Text,icons,padding,)defmain(page):page.title="ListTile Examples"page.add(Card(content=Container(width=500,content=Column([ListTile(title=Text("One-line list tile"),),ListTile(title=Text(...
产生一个indexdiff计算差集intersection计算交集union计算并集isin计算一个指示各值是否都包含在参数集合中的...
drop('timestamp', inplace=True, axis=1)dataframe.head() 输出结果:dataframe.info() 输出结果: <class 'pandas.core.frame.DataFrame'> RangeIndex: 9994446 entries, 0 to 9994445 Data columns (total 7 columns): userid int64 itemid int64 categoryid int64 type object time datetime64[ns] date ...
* DROP table/database 删除 DML 数据管理语句 * INSERT 增加 * DELETE 删除 * UPDATE 更新 * SELECT 查询 1.创建数据库 ——[注释]创建并使用数据库 CREATE DATABASE `mydatabase`; 反引号 USE `mydatabase`; 一般对数据库的操作分为 只读 和 读写当我们在修改的时候采用读写 一般用只读来查询数据 %...
So we see that when we tried to access myList index 5, an error was thrown saying that this index is out of range. But, on the other hand, if you try to access value at a negative index then values from the rightmost index can be accessed backwards. Here is an example: ...