输出psutils.cpu_times_percent（）返回空白而不是值

Question

以脚本执行不会直接从shell返回任何值，而是返回0.0

操作系统：CentOS 7.6.1810

我在提示符下尝试过

Installing psutil…
✔ Installation Succeeded
Installing dependencies from Pipfile.lock (9ac545)…
     ▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉▉ 1/1 — 00:00:06
To activate this project's virtualenv, run pipenv shell.
Alternatively, run a command inside the virtualenv with pipenv run.

# pipenv run python main.py
test

# cat main.py
#!/usr/bin/env python
import psutil
# gives a single float value
psutil.cpu_times_percent(1)
psutil.cpu_count()
print("test")

# pipenv shell
Launching subshell in virtual environment…
 . /root/.local/share/virtualenvs/CPULoad-nZABaO0t/bin/activate

#  . /root/.local/share/virtualenvs/CPULoad-nZABaO0t/bin/activate

# python
Python 3.6.8 (default, Apr 25 2019, 21:02:35)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import psutil
>>> psutil.cpu_times_percent(1)
scputimes(user=0.0, nice=0.0, system=0.0, idle=100.0, iowait=0.0, irq=0.0, softirq=0.0, steal=0.0, guest=0.0, guest_nice=0.0)

我期望与python提示符相同的结果。任何帮助表示赞赏。