[FIXED] Convert spreadsheet number to column letter

Issue

I'm looking for the opposite to this Q&A: Convert an excel or spreadsheet column letter to its number in Pythonic fashion.

or this one but in python How to convert a column number (eg. 127) into an excel column (eg. AA)

Solution

start_index = 1   #  it can start either at 0 or at 1
letter = ''
while column_int > 25 + start_index:   
    letter += chr(65 + int((column_int-start_index)/26) - 1)
    column_int = column_int - (int((column_int-start_index)/26))*26
letter += chr(65 - start_index + (int(column_int)))

Answered By - sundar nataraj