a1 = 1
a2 = 2
a3 = 3
.......
a10000 = 10000

So, I want to create a function that will autoassign names to numbers. In the the code above,

for x in range (desired range):
    a(quantity of x) = x

how do i get my code to call the quatity of x?

Why not use a list? Or maybe a dictionary?

commented: the good solution +14

locals()['a' + str(x)] = x

What you have in mind is very poor programming!
Use a list or dictionary instead.

I need it for a code such as this:

row0 = ['3']
row1 = ['7', '4']
row2 = ['2', '4', '6']
row3 = ['8', '5', '9', '3']

for x in range(4):
    nextNum = locals()['row' + str(x)]

I need it for a code such as this:

No that just stupid code.
Explain better what you want do,then you get suggestions for better ways to solve it.

Use

row = [
    ['3'],
    ['7', '4'],
    ['2', '4', '6'],
    ['8', '5', '9', '3'],
]
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