我正在尝试在八度中使用符号。 首先，使用以下符号下载并安装符号：
pkg install -forge symbolic
pkg load symbolic
然后，开始编写一些代码
syms x
然后出现下一件事：
Initializing communication with SymPy using a popen2() pipe.
"python" is not recognized as an internal or external command,
program or batch file executable.
error: Cannot run the Python executable "python"
Python and SymPy are needed for most Symbolic features.
Is Python installed? Is your "path" configured correctly?
error: called from
assert_have_python_and_sympy at line 24 column 5
python_ipc_popen2 at line 78 column 5
python_ipc_driver at line 59 column 13
python_cmd at line 164 column 9
valid_sym_assumptions at line 38 column 10
assumptions at line 82 column 7
syms at line 97 column 13
我已安装Python 2.7。 这有什么问题吗？