import string
import random

s_list = string.ascii_letters + string.digits

words = ["".join([random.choice(s_list) for _ in range(random.randint(10, 100))]) for _ in range(100)]
with open('q2.txt', 'w') as f:
    for w in words:
        for w in words:
            f.write(w)
            f.write("\n")
with open('q2.txt', 'r') as f:
    lines = f.readlines()
    i = 0
    for l in lines:
        i += 1
    print("{}个字符串".format(i))