Cannot import specific function in Jupyter notebook, however, some function in the same "~.py" can be imported

Question

I have utils.py and there are two functions: runrealcmd, mol_with_atom_index

If I try to import the two function with the following code:

from utils import mol_with_atom_index, runrealcmd

It fails to import runrealcmd. The error message is like below:

ImportError: cannot import name 'runrealcmd' from 'utils'

However, if I try to import only the mol_with_atom_index with the following code:

from utils import mol_with_atom_index

It successes. The function of mol_with_atom_index can be imported in Jupyter notebook.

However, the function of runrealcmd cannot be imported in Jupyter notebook although both of the two functions are in the same utils.py file.

ImportError: cannot import name 'runrealcmd' from 'utils'

utils.py

from subprocess import Popen, PIPE, STDOUT
from IPython.core.magic import register_line_magic

@register_line_magic
def runrealcmd(command):
    # Display instantly: https://stackoverflow.com/questions/52545512/realtime-output-from-a-shell-command-in-jupyter-notebook
    process = Popen(command, stdout=PIPE, shell=True, stderr=STDOUT, bufsize=1, close_fds=True)
    for line in iter(process.stdout.readline, b''):
        print(line.rstrip().decode('utf-8'))
    process.stdout.close()
    process.wait()


def mol_with_atom_index(mol):
    for atom in mol.GetAtoms():
        atom.SetAtomMapNum(atom.GetIdx())
    return mol

Answer 1

(Jupyter notebook) If you want to import the same-named function (previously imported with the same name) from the other path, you should restart the kernel first.