1. 将命令参数作为参数传递，而不是作为标准输入
2. 该命令可能会直接从控制台读取用户名/密码，而无需使用子进程的标准输入.在这种情况下，您可能需要 winpexpect 或 SendKeys 模块.请参阅我对具有相应代码示例的类似问题的回答

1. Pass command arguments as arguments, not as stdin
2. The command might read username/password from console directly without using subprocess' stdin. In this case you might need winpexpect or SendKeys modules. See my answer to a similar quesiton that has corresponding code examples

以下是如何使用参数启动子进程、传递一些输入以及将合并的子进程的 stdout/stderr 写入文件的示例:

Here's an example how to start a subprocess with arguments, pass some input, and write merged subprocess' stdout/stderr to a file:

#!/usr/bin/env python3
import os
from subprocess import Popen, PIPE, STDOUT

command = r'fileLoc\uploader.exe -i file.txt -d outputFolder'# use str on Windows
input_bytes = os.linesep.join(["username@email.com", "password"]).encode("ascii")
with open('command_output.txt', 'wb') as outfile:
    with Popen(command, stdin=PIPE, stdout=outfile, stderr=STDOUT) as p:
        p.communicate(input_bytes)