Is it possbile to achieve the expect script output ?

[qiulang]

I am familiar with expect script so I feel a bit odd when I first use pexpect. Take this simple script as an example,

#!/usr/bin/expect
set timeout 10
spawn npm login
expect "Username:"
send "qiulang2000\r"
expect "Password:"
send "xxxxx\r"
expect "Email:"
send "qiulang@gmail.com\r"
expect "Logged in as"
interact

When run it I will get the following output. It feels natural because that is how I run those commands

spawn npm login
Username: qiulang2000
Password:
Email: (this IS public) qiulang@gmail.com
Logged in as qiulang2000 on https://registry.npmjs.com/.

But when I use pexpect, no matter how I add print(child.after)or print(child.before) I just can't get output like expect, e.g. when I run following command

#! /usr/bin/env python3
import pexpect
child = pexpect.spawn('npm login')
child.expect('Username:')
print(child.after.decode("utf-8"))
child.sendline('qiulang2000')
child.expect('Password:')
child.sendline('xxxx')
child.expect('Email:')
child.sendline('qiulang@gmail.com')
child.expect('Logged in as')
print(child.before.decode("utf-8"))
child.interact()

I got these output, it feels unnatural because that is not what I see when I run those commands.

Username:
 (this IS public)       qiulang@gmail.com

 qiulang2000 on https://registry.npmjs.com/.

So is it it possbile to achieve the expect script output?

[EnigmaticCypher]

@qiulang you need to combine all 3 variables from the child.

before, match, and after. This should give you the missing pieces of the output since you are not including the match variable currently.