初学者提问，请问该怎么编写，为什么最后结果不一致

Question

Answer 1

f = open(r"/Users/lingoace/re.txt", "r+")
b = f.read()
len_b = len(b)
c = b.split(" ")

a = ','.join(c)
len_a = len(a)
f.close()
fo = open(r'/Users/lingoace/cleanData.csva', 'w+')

fo.write(a)
fo.close()
print('新、旧文件字符个数依次为：', len_b, '和', len_a, '个')