In this tutorial we are going to learn about reading a String from the User and Append it into a File in Python.

Python Program to Read a String from the User and Append it into a File

fname = input("Enter file name: ")
file3=open(fname,"a")
c=input("Enter string to append: \n");
file3.write("\n")
file3.write(c)
file3.close()
print("Contents of appended file:");
file4=open(fname,'r')
line1=file4.readline()
while(line1!=""):
    print(line1)
    line1=file4.readline()    
file4.close()

Explanation

1. User must enter a file name.
2. The file is opened using the open() function in the append mode.
3. A string is taken from the user, appended to the existing file and is closed.
4. The file is opened again in the read mode.
5. The readline() in the while loop reads each and every line in the file and print() prints the contents on the output screen.