python文件读写

#文件读取
fh1 = open("C:\\Users\\yw\\Desktop\\test1.txt","r")
data1 = fh1.read()
print(data1)
fh1.close()
#写文件
fh2 = open("C:\\Users\\yw\\Desktop\\test1.txt","w")
data2 = "67890"
fh2.write(data2)
fh2.close()
#append写入
fh3 = open("C:\\Users\\yw\\Desktop\\test1.txt","a+")
data3 = "67890"
fh3.write(data3)
fh3.close()