Question

是否有一种python方式初始化字典？

animals = ["dog","cat","cow"]
for x in animals:
    primers_pos[x]={}

是否有像

这样的东西

(primers_pos[x]={} for x in animals)

Answer 1

您可以使用字典理解（在Python 2.7 +中支持）：

>>> animals = ["dog", "cat", "cow"]
>>> {x: {} for x in animals}
{'dog': {}, 'cow': {}, 'cat': {}}

Answer 2

您也可以使用 collections.defaultdict

Sub StatementReformat()
Application.ScreenUpdating = False
With ActiveDocument.Range.Find
  .ClearFormatting
  .Replacement.ClearFormatting
  .Forward = True
  .Wrap = wdFindContinue
  .Format = False
  .MatchCase = False
  .MatchWholeWord = False
  .MatchAllWordForms = False
  .MatchSoundsLike = False
  .MatchWildcards = True
  'First Page
  .Text = "REPORT*EXTRACT FILE : [A-Z0-9]{1,}^13^12"
  .Replacement.Text = ""
  .Execute Replace:=wdReplaceOne
  'Column Headers (except New First Page)
  .Text = "^12*VEND^13*[-]{1,}^13"
  .Execute Replace:=wdReplaceAll
  'Header Underline on First Page
  .Text = "[-]{1,}^13"
  .Execute Replace:=wdReplaceAll
  'Last Page
  .Text = "          TOTAL #*^12REPORT*{1,255}PAGE*{1,255}FUND TOTALS*[=]{1,}*^13*^13"
  .Execute Replace:=wdReplaceAll
  'Unwanted Header Lines - First Page
  .Text = "REPORT*CHECK^13"
  .Execute Replace:=wdReplaceAll
  'Empty Paragraphs
  .Text = "[ ]{1,}^13"
  .Execute Replace:=wdReplaceAll
  'Header Line Wrap - First Page
  .Text = "(STATUS)^13"
  .Replacement.Text = "\1"
  'Record Line Wraps
  .Execute Replace:=wdReplaceAll
  .Text = "(OUTSTANDING)^13"
  .Execute Replace:=wdReplaceAll
  .Text = "(CLEARED)^13"
  .Replaceme`enter code here`nt.Text = "\1    "
  .Execute Replace:=wdReplaceAll
  .Text = "(VOIDED)^13"
 .Replacement.Text = "\1     "
  .Execute Replace:=wdReplaceAll
  'Pad Records with Multiple Rows
 'Pad Records with Multiple Rows
  .Text = "(^13)([ ]{20})([ ]{1,8}[0-9]{1,8}.[0-9]{2})"
  .Replacement.Text = "\1\2\2\2\2\2\2\2       \3"
  .Execute Replace:=wdReplaceAll
End With
Application.ScreenUpdating = True
End Sub

然后，每当您使用新密钥引用 primer_pos 时，将自动创建字典

primer_pos = defaultdict(dict)

将链创建 {'Fluffy'：'Nice Kitty'} 作为字典 primer_pos

中键'cat'的值

在for循环中初始化dict的pythonic方法

2 个答案: