Check whether package X is installed

Method 1: In the shell

If you are using the environment as I introduced, all your third-party python packages are installed under the environment directory. And the python interpreter (i.e. the python command) already know where they locates, and allow you to import them, just like other built-in python packages.

To check this, just use python interpreter in the shell

# go into the environment

# hq @ Hanqings-iMac in ~ [19:58:58]
$ conda activate genome_book
(genome_book)


# you should see you are using the python interpreter
# from your environment directory

# hq @ Hanqings-iMac in ~ [19:59:14]
$ which python
/Users/hq/miniconda3/envs/genome_book/bin/python
(genome_book)


# Now start the python interpreter

# hq @ Hanqings-iMac in ~ [19:59:21]
$ python
Python 3.7.6 | packaged by conda-forge | (default, Mar 23 2020, 22:45:16)
[Clang 9.0.1 ] on darwin
Type "help", "copyright", "credits" or "license" for more information.


>>> import pandas as pd  # import package X, pd is just a temporary alias for pandas, you can name it whatever you want
>>> pd.__version__  # the above command already confirmed pandas is installed. But this command tell you the exact version
'1.0.3'

Method 2: In Jupyter Notebook

Here I explained how to start Jupyter Notebook server under the genome_book environment.

If you can go into Jupyter, check out this Jupyter Notebook. (It's in the GitHub Repo as well)