PyQt5 Custom QCompleter

Question

My Question is regarding QCompleter, Following minimum working code using QCompleter executes succesfully, and the output is also given below,

import sys
from PyQt5.QtWidgets import (
    QApplication,
    QCompleter,
    QLineEdit,
    QVBoxLayout,
    QWidget
)
import pandas as pd

data2={'Name': ['Tom', 'John','Pakistan',"word1","word2","Ten"], 
    'Description': ["Cruise",
            "cena",
            "Capital is Islamabad", 
            "synonum of word1",
            "example of word2",
            "10",
            ]}  
df=pd.DataFrame(data2)

class mywin(QWidget): # doesnot work with QMainWindow
    def __init__(self):
        super(mywin,self).__init__()
        self.initUI()
    
    def initUI(self):
        vbox=QVBoxLayout()
        self.setWindowTitle('application')
        self.setGeometry(200,200,400,200)
        
        self.l=QLineEdit()
        completer=QCompleter(df.Name)
        self.l.setCompleter(completer)
        vbox.addWidget(self.l)
        self.setLayout(vbox)

def mymain():
    app = QApplication(sys.argv)
    win=mywin()
    win.show()
    sys.exit(app.exec_())

if __name__=='__main__':
    mymain()

and the output is shown below

Now, I want QCompleter to show the second column which is 'Description', It should find elements based on 1st column but suggest the corresponding second column entry. For Example: If 'Tom' is typed/selected, the QCompleter should show 'Cruise' only, if "John" is selected then the QCompleter should enter "Cena" only in the QLineEdit QObject (QLineEdit should show Cena only when John is typed/selected, Cruise only when Tom is typed/selected), and same for all other entries.

Please Note: that completer=QCompleter(df.Description) is not the answer i am looking for.