How to give jupyter cell standard input in python?

I am trying to run a program on a jupyter notebook that accepts user input, and I cannot figure out how to get it to read standard input. For example, if I run the code with shift-enter:

a = input()
print(a)

the cell indicates it is running, but does not accept input from me. How do I get it to accept input?

Solution 1:

Use the raw_input() (for Python 2) or input() (for Python 3) methods.

Example code:

a = raw_input()
print(a)

Example notebook:

Solution 2:

I came across the same problem, using the input in jupyternotebook, it blocks the execution and it does not work until restarting the program, so I added a print () after each input and my program is working.

Solution 3:

Probably you hit Shift-Enter a second time without completing the first input with Enter, so the kernel was always waiting until the first command completed, before executing it again. If you use in the menu

"Kernel", "Interrupt",

all active commands are stopped (including the second execution of the box) and the problem should be solved without restarting the computer (or the browser / the kernel).

Solution 4:

You are doing it right, you ony have to restart the kernel (over the Run button)