Python 3: EOF when reading a line (Sublime Text 2 is angry)

Question

while True:     reply = input('Enter text')     if reply == 'stop': break     print(reply.upper()) 

The result was:

Enter text:Traceback (most recent call last):   File "C:\PythonProjects\5.py", line 2, in <module>     reply = input('Enter text:') EOFError: EOF when reading a line [Finished in 0.2s with exit code 1] 

It is only in Sublime Text 2. I tried IDLE, tried command line, everything is perfect. Why should Subleme shout at me?

By the way, maybe you could also explain my what EOF may mean in such situation. Of course, I have read in the documentation, that if EOF is read from input, the appropriate error is raised. I would like to model this situation. Is input only about the keyboard? If yes, what combination of keys should I input to get EOF?

Thank you in advance.

Answer 1

I had the same problem. The problem with the Sublime Text's default console is that it does not support input.

To solve it, you have to install a package called SublimeREPL. SublimeREPL provides a Python interpreter which accepts input.

There is an article that explains the solution in detail.

GitHub page for SublimeREPL

Answer 2

help(input) shows what keyboard shortcuts produce EOF, namely, Unix: Ctrl-D, Windows: Ctrl-Z+Return:

input([prompt]) -> string

Read a string from standard input. The trailing newline is stripped. If the user hits EOF (Unix: Ctl-D, Windows: Ctl-Z+Return), raise EOFError. On Unix, GNU readline is used if enabled. The prompt string, if given, is printed without a trailing newline before reading.

You could reproduce it using an empty file:

$ touch empty $ python3 -c "input()" < empty Traceback (most recent call last):   File "<string>", line 1, in <module> EOFError: EOF when reading a line 

You could use /dev/null or nul (Windows) as an empty file for reading. os.devnull shows the name that is used by your OS:

$ python3 -c "import os; print(os.devnull)" /dev/null 

Note: input() happily accepts input from a file/pipe. You don't need stdin to be connected to the terminal:

$ echo abc | python3 -c "print(input()[::-1])" cba 

Either handle EOFError in your code:

try:     reply = input('Enter text') except EOFError:     break 

Or configure your editor to provide a non-empty input when it runs your script e.g., by using a customized command line if it allows it: python3 "%f" < input_file