fake_data.py

from faker import Faker
fake = Faker()

outfile = 'data.csv'
outsize = 1024 * 1024 * 1024 # 1GB

with open(outfile, 'w') as csvfile:
    size = 0
    while size < outsize:
        txt = '%s, %s\n' % (fake.name(), fake.address())
        size += len(txt)
        csvfile.write(txt