我正在尝试将加密技术安装到我的系统中，但出现此错误：
WARNING: Missing build requirements in pyproject.toml for cryptography from https://files.pythonhosted.org/packages/07/ca/bc827c5e55918ad223d59d299fff92f3563476c3b00d0a9157d9c0217449/cryptography-2.6.1.tar.gz#sha256=26c821cbeb683facb966045e2064303029d572a87ee69ca5a1bf54bf55f93ca6.
WARNING: The project does not specify a build backend, and pip cannot fall back to setuptools without 'setuptools>=40.8.0' and 'wheel'.
Getting requirements to build wheel ... done
ERROR: Exception:
Traceback (most recent call last):
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/cli/base_command.py", line 178, in main
status = self.run(options, args)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/commands/install.py", line 352, in run
resolver.resolve(requirement_set)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 131, in resolve
self._resolve_one(requirement_set, req)
File "/data/packages/usr/local/lib/python3.6/site-packages/pip/_internal/resolve.py", line 294, in _resolve_one
abstract_dist = self._get_abstract_dist_for(req_to_install)
File …我正在尝试创建一个自定义类的数组,但它给了我这个错误:
运行时错误'91':
对象变量或未设置块变量
到目前为止,这是我的代码:
Sub DBM_Format()
Dim coreWS As Worksheet
Dim WS As Worksheet
Dim LastRow As Long
Dim RowRange As Long
Dim dataList() As clsDBM
Dim tmpdate As Date
Set coreWS = Sheets(ActiveSheet.Name)
'Set WS = Sheets.Add
LastRow = coreWS.Columns("A").Cells.Find("*", SearchOrder:=xlByRows, LookIn:=xlValues, SearchDirection:=xlPrevious).row
RowRange = LastRow - 1
Dim row As Integer
ReDim Preserve dataList(RowRange)
Dim i As Integer
Dim tmpData As clsDBM
For i = 0 To (RowRange - 1)
row = i + 2
tmpData.setDate = Format(Cells(row, …