捕获和转换Web的工具

使用Python从网站捕获HTML表Python API

有多种转换HTML表的方法 into使用CSV和Excel电子表格 GrabzIt的Python API,这里详细介绍了一些最有用的技术。 但是,在开始之前,请记住 URLToTable, HTMLToTable or 文件到表格 方法 Save or SaveTo 必须调用方法来捕获表。 如果您想快速查看此服务是否适合您,可以尝试 捕获HTML表的实时演示 从URL。

基本选项

以下代码段自动转换指定网页中的第一个HTML表 int可以下载或解析的CSV文档。

grabzIt.URLToTable("https://www.tesla.com")
# Then call the Save or SaveTo method
grabzIt.HTMLToTable("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>")
# Then call the Save or SaveTo method
grabzIt.FileToTable("tables.html")
# Then call the Save or SaveTo method

默认情况下,它将转换它标识的第一个表 intoa表。 但是,可以通过将2传递给网页中的第二个表来进行转换 tableNumberToInclude 属性。

from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.tableNumberToInclude = 2

grabzIt.URLToTable("https://www.tesla.com", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.csv")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.tableNumberToInclude = 2

grabzIt.HTMLToTable("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.csv")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.tableNumberToInclude = 2

grabzIt.FileToTable("tables.html", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.csv")

您还可以指定 targetElement 该属性将确保仅转换指定元素ID中的表。

from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.targetElement = "stocks_table"

grabzIt.URLToTable("https://www.tesla.com", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.csv")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.targetElement = "stocks_table"

grabzIt.HTMLToTable("<html><body><table id='stocks_table'><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.csv")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.targetElement = "stocks_table"

grabzIt.FileToTable("tables.html", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.csv")

另外,您也可以通过将true传递给 includeAllTables 属性,但是仅适用于XLSX和JSON格式。 此选项会将每个表放在生成的电子表格工作簿中的新表中。

from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.format = 'xlsx'
options.includeAllTables = True

grabzIt.URLToTable("https://www.tesla.com", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.xlsx")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.format = 'xlsx'
options.includeAllTables = True

grabzIt.HTMLToTable("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.xlsx")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.format = 'xlsx'
options.includeAllTables = True

grabzIt.FileToTable("tables.html", options)
# Then call the Save or SaveTo method
grabzIt.SaveTo("result.xlsx")

将HTML表转换为JSON

使用Python和GrabzIt的HTML表格转换服务可以转换HTML表格 into JSON。 如下所示的第一步是指定 json 在format参数中。 然后我们得到JSON string 同步地SaveTo 方法,然后您可以使用自己喜欢的Python JSON解析器来转换JSON string intoa对象。

from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.format = "json"
options.tableNumberToInclude = 1

grabzIt.URLToTable("https://www.tesla.com", options)

json = grabzIt.SaveTo()
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.format = "json"
options.tableNumberToInclude = 1

grabzIt.HTMLToTable("<html><body><table><tr><th>Name</th><th>Age</th></tr>
    <tr><td>Tom</td><td>23</td></tr><tr><td>Nicola</td><td>26</td></tr>
    </table></body></html>", options)

json = grabzIt.SaveTo()
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.format = "json"
options.tableNumberToInclude = 1

grabzIt.FileToTable("tables.html", options)

json = grabzIt.SaveTo()

自订识别码

您可以将自定义标识符传递给 方法,如下所示,然后将该值返回给您的GrabzIt Python处理程序。 例如,此自定义标识符可以是数据库标识符,从而允许将屏幕截图与特定的数据库记录相关联。

from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.customId = "123456"

grabzIt.URLToTable("https://www.tesla.com", options)
# Then call the Save method
grabzIt.Save("http://www.example.com/handler.py")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.customId = "123456"

grabzIt.HTMLToTable("<html><body><h1>Hello World!</h1></body></html>", options)
# Then call the Save method
grabzIt.Save("http://www.example.com/handler.py")
from GrabzIt import GrabzItTableOptions
from GrabzIt import GrabzItClient

grabzIt = GrabzItClient.GrabzItClient("Sign in to view your Application Key", "Sign in to view your Application Secret")

options = GrabzItTableOptions.GrabzItTableOptions()
options.customId = "123456"

grabzIt.FileToTable("example.html", options)
# Then call the Save method
grabzIt.Save("http://www.example.com/handler.py")