編寫一個程序，要求用戶輸入地址文件的名稱和輸出文件的名稱

Question

您的程序應該將「NY」的所有出現次數替換爲「New York」，將所有出現的「NJ」替換爲「New Jersey

例如，如果你的文件replace.txt包含：

from wikipedia: 
NY-NJ-CT Tri-State Area 
The NY metropolitan area includes the most populous city in the US 
(NY City); counties comprising Long Island and the Mid- and Lower Hudson 
Valley in the state of New York. 

輸出必須是：

from wikipedia: 
New York-New Jersey-CT Tri-State Area 
The New York metropolitan area includes the most populous city in the United 
States (New York City); counties comprising Long Island and the Mid- and 
Lower Hudson Valley in the state of New York. 

我盡力了，這裏是我的程序

filename = input("Please enter a file name: ") 
openfile = open(filename, "r") 
readfile = openfile.read() 


for i in readfile: 
    for string in i.replace("NY", "New York"): 
     Replace = string.replace("NJ", "New Jersey") 

print(Replace) 

問題是它沒有打印出任何東西。 請幫助！

Answer 1

只需更換兩個thinkgs，這就夠了：

Replace = readfile.replace("NJ", "New Jersey") 
Replace = Replace.replace("NY", "New York") 

# or 
# Replace = readfile.replace("NJ", "New Jersey").replace("NY", "New York") 

print(Replace) 

你不需要任何這裏循環。 readfile已經包含了輸入文件的全部內容。

要將結果保存在一個新的文件：

with open("outfile.txt",'w') as f: 
    f.write(Replace) 

Answer 2

喜歡的東西：

for i in readfile: 
    i = i.replace("NY", "New York") 
    i = i.replace("NJ", "New Jersey") 
    print (i) 

但它並不完全正確，因爲你正在閱讀的整個文件到ReadFile的。按行處理文件通常更好

filename = input("Please enter a file name: ") 
with open(filename, "r") as readfile: 
    for i in readfile: 
     i = i.replace("NY", "New York") 
     i = i.replace("NJ", "New Jersey") 
     print (i)