Question

I’m fetching data from Mysql from table person(id, name, email). The table has many rows.
I’m trying to put into a json array in a loop. But in the json array it gets overwritten with the new array.

   for row in results:
        persons = {
                     [{
                        'personId' : row[0],
                        'personName' : row[1],
                        'personEmail' : row[2]
                    },]
                 }
    print json.dumps(persons)

can anybody give a solution?

Answer 1

In your code, in each iteration of the for loop, you’re rebuilding persons as a Python dictionary with one member which is the current row, not adding more rows (“people”) to the dictionary. You need to rewrite that, something along the lines of :

persons={}
for row in results:
    persons[row[0]] = {                    
                        'personId' : row[0],
                        'personName' : row[1],
                        'personEmail' : row[2]                    
                 }
print json.dumps(persons)