Upload and split the file into 2 parts. Please use this - http://pinetools.com/split-files

In Python:

import pandas as pd

data1 = pd.read_table("/data/ratings.dat.000", sep="\:\:", header=None, engine='python')
data2 = pd.read_table("/data/ratings.dat.001", sep="\:\:", header=None, engine='python')

data = data1.append(data2)


In R:

data1 = read.csv("/data/ratings.dat.000", sep = ":", colClasses = c(NA, "NULL"), header = FALSE)
data2 = read.csv("/data/ratings.dat.001", sep = ":", colClasses = c(NA, "NULL"), header = FALSE)

data = rbind(data1, data2)