捕獲和轉換Web的工具

使用Python從網站捕獲HTML表Python API

有多種轉換HTML表的方法 into使用CSV和Excel電子表格 GrabzIt的Python API,這裡詳細介紹了一些最有用的技術。 但是,在開始之前,請記住 URLToTable, HTMLToTable or 文件到表格 方法 Save or SaveTo 必須調用方法來捕獲表。 如果您想快速查看此服務是否適合您,可以嘗試 捕獲HTML表的實時演示 從URL。

基本選項

以下代碼段自動轉換指定網頁中的第一個HTML表 int可以下載或解析的CSV文檔。

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

默認情況下,它將轉換它標識的第一個表 intoa表。 但是,可以通過將2傳遞給網頁中的第二個表來進行轉換 tableNumberToInclude 屬性。

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")

您還可以指定 targetElement 該屬性將確保僅轉換指定元素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,您也可以通過將true傳遞給 includeAllTables 屬性,但是僅適用於XLSX和JSON格式。 此選項會將每個表放在生成的電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")

將HTML表轉換為JSON

使用Python和GrabzIt的HTML表格轉換服務可以轉換HTML表格 into JSON。 如下所示的第一步是指定 json 在format參數中。 然後我們得到JSON string 同步地SaveTo 方法,然後您可以使用自己喜歡的Python JSON解析器來轉換JSON string intoa對象。

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()

自訂識別碼

您可以將自定義標識符傳遞給 方法,如下所示,然後將該值返回給您的GrabzIt Python處理程序。 例如,此自定義標識符可以是數據庫標識符,從而允許將屏幕截圖與特定的數據庫記錄相關聯。

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")