Remove special characters from array elements and mix it with another array - robotframework

Question

I apologize if this is repeated, but I'm total noob with Robot framework, and I would need help. I have two arrays, results from database:
#{users}= query Select * from users
#{fieldNames}= query SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'robot_test' AND TABLE_NAME = 'users';
Results that I get from this are:
#{users}= (1, 'user1', 'pass1', 'admin'), (2, 'user2', 'pass2', 'user')
#{fieldNames} = [ ('id',) | ('username',) | ('password',) | ('role',) ]
I would like to filter #(fieldNames) to become
#{fieldNames} = [ 'id','username','password','role']
And then to mix it with #(users) to get
#{mixedArray}= (('id',1) , ('username','user1'), ('password','pass1'), ('role','admin')), (('id',2) , ('username','user2'), ('password','pass2'), ('role','user'))
Is there a way to do this? Thanks everyone for help.

Answer 1

Because database library returns query results as a list of tuples, you can just iterate through them. Only cleaning I did was to use Combine Lists to get rid of tuples inside fieldNames list.
*** Settings ***
# Library Dialogs
Library Collections
Library DatabaseLibrary
library pymysql
*** Variables ***
#{database} pymysql users root df478444 localhost 3306
*** Test Cases ***
Stackoverflow
Connect To Database #{database}
#{users}= query Select * from Users
#{fieldNames}= query SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'users' AND TABLE_NAME = 'Users';
#{fields list}= Combine Lists #{fieldNames}
#{mixedArray}= Create List
:FOR ${user} IN #{users}
\ ${user row}= parse user ${user} ${fields list}
\ Append To List ${mixedArray} ${user row}
Log ${mixedArray}
*** Keywords ***
Parse User
[Arguments] ${user} ${fields}
#{line}= Create List
${list length}= Get Length ${fields}
:FOR ${i} IN RANGE ${list length}
\ #{pair}= Create List
\ ${f}= Get From List ${fields} ${i}
\ ${u}= Get From List ${user} ${i}
\ Append To List ${pair} ${f}
\ Append To List ${pair} ${u}
\ Append To List ${line} ${pair}
Return From Keyword ${line}