#函数
def welcome():
print(‘欢迎你‘)
welcome()
def write_file(file_name,cotent):
f = open(file_name,‘a+‘,encoding=‘UTF-8‘)
f.write(cotent)
f.seek(0)
x = f.read()
print(x)
f.close()
write_file(‘a.txt‘,‘今天天气好晴朗‘)
原文：https://www.cnblogs.com/lqcjlu/p/11871071.html