Generate "scattered" items, that do not overlap

This is a question that i had to solve, but have been banging my head against a wall for the past 5 days. There must be something really simple that i am missing, or misunderstanding, as the logic seems 100% correct in my head, but it just won't work.

I need to draw "scattered" houses, that do not over lap, 100 of them. I have to use turtle to draw them, so i have X and Y coordinates. And X and Y list for verification purposes, to see if a house is already in that place.

What i am doing is drawing a "house" (square with a triangle on top) on the randomized coordinates, I loop while the number of houses is less than 100. On each loop i randomize the x and y coordinates, from where i start drawing each house with turtle. I check if the value is already in the X and Y verification lists, and also if my new X and Y are +/- the size of the house (treating it as a square)

import turtle
import time
import random
t = turtle.Turtle()
turtle.screensize(1920,1000)
x_verif = []
y_verif = []
t.speed(0)
collision = None


def square():
    for s in range(0, 4):
        t.forward(90)
        t.left(90)

def triangle():
    for s in range(0, 2):
        t.left(-60)
        t.forward(52)

def house():
    square()
    t.left(90)
    t.forward(90)
    triangle()

def scatter():
    print("a")
    house()
    x1 = random.randint(-850, 850)
    y1 = random.randint(-380, 380)
    count = 0
    while count < 100:
        print("a2")
        i = 0
        u = 0
        collision = False
        for  tries in range (0, 2):
            print("a3")
            x_verif.append(x1)
            y_verif.append(y1)
        while u < 100:
            print("a4")

            print(x_verif, y_verif, x1, y1)
            while i < len(x_verif):
                x1 = random.randint(-850, 850)
                y1 = random.randint(-380, 380)
                print(x1, y1)
                if x1 not in x_verif and (x1 > x_verif[i]+91 or x1 < x_verif[i]-91):
                    if y1 not in y_verif and (y1 > y_verif[i]+142 or y1 < y_verif[i]-142):
                        collision = False
                else:
                    collision = True
            if collision == False:
                            t.penup()
                            t.hideturtle()
                            t.setx(x1)
                            t.sety(y1)
                            t.pendown()
                            house()
                            x_verif.append(x1)
                            y_verif.append(y1)
                            count += 1
            i += 1
        u += 1


scatter()

Sorry for the ugly code, and the simplicity behind it. I would love to use list comprehensions for this, but i do not know where my logic fails at the moment. This is like my 100th try, as of this version it only draws the initial house and i think it loops infinitely somewhere....

My problem lies in looping through the whole lists for every new value. Do i need to loop through them every time, or is there some IF condition that I can use? Edit: It keeps on looping through random values, but none of them are accepted by the two IF statements that i'm using.

On a side note: With my current code they also change direction of drawing every time... No idea why is that happening....