Attributeerror: type object 'mastertrainer' has no attribute 'latitude'

import math
import csv
import numpy

from math import radians, sin, cos, acos

class venue:
    venueGeoLat = []
    venueGeoLon = []
    venueName = []
    def __init__(self,name,latitude,longitude):
        self.name = name
        self.latitude = latitude
        self.longitude = longitude

    with open('venueData.csv') as csvDataFile:
        csvReader = csv.reader(csvDataFile)
        for row in csvReader:
            venueGeoLat.append(row[1])
            venueGeoLon.append(row[2])
            venueName.append(row[0])

class masterTrainer:  #class generated for the master trainers for the whole state
    distanceFromVenues = []
    nearestVenues = []
    latitude = None
    longitude = None
    def __init__(self,name,location,subject,latitude,longitude):
        self.name = name
        self.location = location
        self.subject = subject
        self.latitude = latitude
        self.longitude = longitude
    i = 1
    j = 1
    while i < 2:
        while j < len(venue.venueGeoLat):
            masterTrainer.distanceFromVenues.append(masterTrainer.distanceCalculator(float(masterTrainer.latitude),float(masterTrainer.longitude),float(venue.venueGeoLat[j]),float(venue.venueGeoLon[j])))
            j = j + 1
        i = i + 1
            
    MAX = 100000
    firstmin = MAX
    secmin = MAX
    thirdmin = MAX
    k = 0
    l = 0
    m = 0
    for i in range(0, len(distanceFromVenues)):
        if distanceFromVenues[i] < firstmin:
            thirdmin = secmin
            secmin = firstmin
            firstmin = distanceFromVenues[i]
            k = i

        elif distanceFromVenues[i] < secmin:
            thirdmin = secmin
            secmin = distanceFromVenues[i]
            l = i

        elif distanceFromVenues[i] < thirdmin:
            thirdmin = distanceFromVenues[i]
            m = i
    nearestVenues.append(venue.venueName[k+1])
    nearestVenues.append(venue.venueName[l+1])
    nearestVenues.append(venue.venueName[m+1])

    def distanceCalculator(latitude1,longitude1,latitude2,longitude2):
        slat = radians(latitude1)
        slon = radians(longitude1)
        elat = radians(latitude2)
        elon = radians(longitude2)
        dist = 6371.01 * acos(sin(slat)*sin(elat) + cos(slat)*cos(elat)*cos(slon - elon))
        return dist

    



#mt1 = masterTrainer("Suhit Kumar", "Kanpur","Mathematics","30.7996","75.9042")
#print(mt1.distanceFromVenues)
#print(mt1.nearestVenues)
masters = []
with open('mtData.csv') as csvDataFile:
    csvReader = csv.reader(csvDataFile)
    for row in csvReader:
        masters.append(masterTrainer(row[0],row[1],row[4],row[2],row[3]))


#for m in masters:
    #print(m.distanceFromVenues)
print(masters[1].nearestVenues)

AttributeError: type object 'masterTrainer' has no attribute 'latitude'