摘要：
Groupby Count The command returns a series where the index is the name of a Party and the value is the count of that Party. Note that the series is or 阅读全文
摘要：
Create a Dictionary from a Table 阅读全文
摘要：
Selecting a Row or Selecting a Column Or Selecting an Element Selecting Multiple Discontinuous Rows Or E.g. 阅读全文