Is the argparse package still needed for the Python 3.5 version?

[ShuaiHuang]

When I deploy the gcForest in the Anaconda environment with Python 3.5 using the following command

conda create -n gcForest python=3.5 argparse

and the error message is displayed as following:

Solving environment: failed

UnsatisfiableError: The following specifications were found to be in conflict:
  - argparse -> python=2.6
  - python=3.5
Use "conda info <package>" to see the dependencies for each package.

It seems that there is a confliction between Python 3.5 environment and the argparse package. So I am wondering whether the argparse is still required for the code in Python 3.5 version?