How to read router prompt and use it?

[simbha]

Took a while but i could figure it out. Just in case any one is interested.

==== skipped the tn connect part===

Prompt capture to a string:

>>>tn.write(b" " + "\n".encode('ascii'))   ===> Send a simple enter("\n" character and capture the output to get prompt.
>>>str2 = tn.read_eager().decode()   ====> Save prompt to a string.
>>>print(str2)

Output:
[Router]R5-NYC#

Command output capture to a string in case output is multiple lines.

>>>tn.write(b"show clock" + "\n".encode('ascii'))
>>>str2 = tn.read_very_eager().decode()
>>>print(str2)

Output:
show clock
Wed May 22 07:16:09 2019 CST
[Router]R5-NYC#

tn.read_eager() ===> Kinda returns line by line output but very inconsistent and can be saved to a string.
tn.read_very_eager() === > Returned the entire output(including multiple lines) and can be saved to a string.