今天學習的是argv的filename屬性以及檔案的open和read，txt是在相同路徑內已存在的一個txt

from sys import argv

scrip, filename = argv 

txt = open(filename) #開啟路徑並賦值給txt

print(f"Here's your file {filename}：")
print(txt.read())#txt的read屬性，讀txt的內容

print("Type the filename again:")
file_again = input(">")#利用input將路徑名賦值給file_again
 


txt_again = open(file_again)#開啟路徑

print(txt_again.read())