R网状安装python软件包

如何解决R网状安装python软件包

我无法通过网状安装python软件包。我收到以下错误：

virtualenv_install('r-reticulate','numpy')

Using virtual environment 'r-reticulate' ...
Error: invalid version specification ‘’,‘  ’
In addition: Warning messages:
1: In system2(python,c("-c",shQuote(command)),stdout = TRUE,stderr = TRUE) :
  running command ''/home/xxxxxxxxx/.virtualenvs/r-reticulate/bin/python' -c 'import sys; import pip; sys.stdout.write(pip.__version__)' 2>&1' had status 1
2: In if (idx != -1) version <- substring(version,1,idx - 1) :
  the condition has length > 1 and only the first element will be used

我已经创建了虚拟环境，并且可以找到它。

virtualenv_list()
[1] "r-reticulate"

任何想法如何找出问题所在？