How can I import croniter in my modular input?

[prabhasgupte]

I want to accept data input interval as cron entry and process it in my modular input.
I am referring this REST API Modular Input app (https://splunkbase.splunk.com/app/1546/) for that. It uses croniter to get next run time of job.

However, I am not being able to import croniter into my modular input script.
I have croniter egg file at SPLUNK_HOME/etc/apps/TA-myta/bin/croniter-0.3.8-py2.7.egg
I have also explicitly added SPLUNK_HOME/etc/apps/TA-myta/bin/croniter-0.3.8-py2.7.egg to sys.path (not needed, but added as an attempt to make it work.)
However, when I try to import croniter, I get ImportError.

How can I fix this?

My code to the point of failure looks as follows. I always get into except block and never see "ready to go":
import sys
from datetime import datetime

import splunk.clilib.cli_common as scc
import splunk.entity as entity

logger = logging.getLogger('TA-myta')

TA_ROOT = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))

egg_dir = TA_ROOT + "/bin/croniter-0.3.8-py2.7.egg"
sys.path.append(egg_dir)
try:
    from croniter import croniter
except:
    logger.error("could not import croniter. Exiting.")
    exit(0)

logger.info("ready to go")

Edit 1:
The splunkd.log has following lines:

03-22-2017 16:27:30.105 +0530 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-myta/bin/myta.py" ImportError: No module named dateutil.relativedelta
03-22-2017 16:28:30.264 +0530 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-myta/bin/myta.py" Traceback (most recent call last):
03-22-2017 16:28:30.264 +0530 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-myta/bin/myta.py"   File "/opt/splunk/etc/apps/TA-myta/bin/myta.py", line 39, in <module>
03-22-2017 16:28:30.265 +0530 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-myta/bin/myta.py"     from croniter import croniter
03-22-2017 16:28:30.265 +0530 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-myta/bin/myta.py"   File "/opt/splunk/etc/apps/TA-myta/bin/croniter-0.3.8-py2.7.egg/croniter/__init__.py", line 3, in <module>
03-22-2017 16:28:30.265 +0530 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-myta/bin/myta.py"     import abc
03-22-2017 16:28:30.265 +0530 ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/TA-myta/bin/myta.py"   File "/opt/splunk/etc/apps/TA-myta/bin/croniter-0.3.8-py2.7.egg/croniter/croniter.py", line 8, in <module>

[prabhasgupte · Accepted solution]

Never mind! Got it working!!

I needed to add and import eggs for python_dateutil and six - as dependencies for croniter.