为什么 exec 命令在运行以下代码时会抛出错误？

Question

This is the code:

stdin, stdout, stderr = client.exec_command(krd_spot 7/5/2019 -df UYU_GOVT_RR -debug DISCFUNC |& less)
out = stdout.read().decode('utf-8')
err = stderr.read().decode('utf-8')
print(out)

This is the error:

File "<ipython-input-15-2085d261d263>", line 1
    stdin, stdout, stderr = client.exec_command(krd_spot 7/5/2019 -df UYU_GOVT_RR -debug DISCFUNC |& less)
                                                         ^
SyntaxError: invalid syntax

Answer 1

The command should be passed as a string:

stdin, stdout, stderr = client.exec_command("krd_spot 7/5/2019 -df UYU_GOVT_RR -debug DISCFUNC |& less")