python 3.x：如何按照新行中的用戶輸入將文本寫入/附加到現有文件？

Question

我試圖根據用戶輸入從終端寫入或追加數據到具有一些數據的文件。我的代碼如下所述，它允許我添加/附加，但不能作爲新行。我試圖解決它，但無法弄清楚，我做錯了什麼？

f = open("test1.txt","a+"); 
print ("Name of the file:",f.name); 
#rdl = f.readline(); 
#print ("This is my readline : %s" % rdl); 
#f.seek(0,2); 
usrtext = input("Enter your text which you want to add : " + "\n"); 
f.seek(0,2); 
f.write(usrtext); 
f.seek(0,0); 
rlds = f.readlines(); 
print ("This is my readlines : %s\n" % rlds); 
#Close opened file 

f.close(); 

預期輸出：

This is my new line 1 
This is my append/write line 

Answer 1

剛纔我在此代碼註釋f.seek(0,2)並得到了文件中的預期輸出。

工作代碼如下：

f = open("test1.txt","a+"); 
print ("Name of the file:",f.name); 
#f.close(); 
#rdl = f.readline(); 
#print ("This is my readline : %s" % rdl); 
#f.seek(0,2); 
usrtext = input("Enter your text which you want to add : " + "\n"); 
**#f.seek(0,2);** 
f.write("\n" + usrtext); 
f.seek(0,0); 
rlds = f.readlines(); 
print ("This is my readlines : %s\n" % rlds); 
#Close opened file 

f.close();