包含字符串和整數的二維列表

Question

我有一個二維清單。 即嵌套列表，其中包含整數和字符串。

mylist = [[92, "james"], [88, "john"], [75, "robert"], [80, "michael"], [25, "william"], [54, "david"], [59, "richard"], [74, "charles"], [46, "joseph"], [90, "thomas"], [80, "christopher"]]

我只想找到一種方法來檢查字符串，檢查它們是否以特定字母開頭； 說j ，將其刪除，然后忽略不滿足此條件的其余元素。

所需的結果將如下所示：

mylist = [[92, "ames"], [88, "ohn"], [75, "robert"], [80, "michael"], [25, "william"], [54, "david"], [59, "richard"], [74, "charles"], [46, "oseph"], [90, "thomas"], [80, "christo, her"]]

Answer 1

如果我理解正確，這是使用列表理解的解決方案：

mylist = [[num, (name[1:] if name[0] == "j" else name)]
          for num, name in mylist]

Answer 2

您可以使用函數lstrip()刪除前導字符：

[[i, j.lstrip('j')] for i, j in mylist]