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...	...	@@ -91,6 +91,12 @@
91	91	\\(% style="color:#000000" %)python3 -m venv pynn_env
92	92	)))
93	93
	94	+(% class="box warningmessage" %)
	95	+(((
	96	+**Note:**
	97	+\\Observe that this command is as 'python3' and not simply 'python'. This is because Ubuntu 20, as default, understands only the former. You can find on the Internet various ways to have 'python' also refer to 'python3', but for the purposes of this tutorial we shall keep things simple and try to work with the bare minimum changes to the system.
	98	+)))
	99	+
94	94	This will create a sub-directory named 'pynn_env' within our project directory, with several files and sub-directories. Let us take a look at the 'site-packages' directory.
95	95
96	96	(% class="box infomessage" %)
...	...	@@ -111,6 +111,12 @@
111	111
112	112	Notice how this changes the command prompt to show the name of your virtual environment. In our case, we had named it 'pynn_env', and this is now reflected as a prefix to the command prompt. This confirms that we are now in our new virtual environment.
113	113
	120	+(% class="box warningmessage" %)
	121	+(((
	122	+**Note:**
	123	+\\You might be required to run the above command every time you open a new terminal window. Do verify that the terminal command prompt indicates the name of your virtual environment to confirm that you have indeed activated it.
	124	+)))
	125	+
114	114	Now that we have our project's virtual environment setup, we are now ready to install PyNN and other simulators. In general, it is advisable to install the various simulators (especially NEURON and NEST) prior to installing PyNN, because PyNN will then auto compile NEURON's NMODL fles and NEST's extensions during installation. Alternatively, this would need to be done manually as described on the PyNN website. In this tutorial, we will adopt the easier approach and begin by installing the simulators. For the purposes of this tutorial, we shall demonstrate the installation of Brian2, NEURON and NEST simulators.
115	115
116	116	We start here with the installation of Brian 2. Brian 2 can be installed simply using the pip command.
...	...	@@ -134,11 +134,17 @@
134	134	(% class="box infomessage" %)
135	135	(((
136	136	**Screencast** - terminal
137		-\\(% style="color:#000000" %)python3
	149	+\\(% style="color:#000000" %)python
138	138	\\import brian2
139	139	\\exit()
140	140	)))
141	141
	154	+(% class="box warningmessage" %)
	155	+(((
	156	+**Note: **
	157	+\\You might remember that earlier in this tutorial we had to use the term 'python3' to run Python on our system. But here, as in the rest of this tutorial, we shall simply write 'python'. This is possible because once we have activated our virtual environment, this environment understands that both 'python' and 'python3' are equivalent.
	158	+)))
	159	+
142	142	If there are no error messages here, and the import is successful, then we have completed installing Brian 2.
143	143
144	144	We shall now move on to install the NEST simulator. Unlike Brian 2, NEST is not a Python package and therefore it cannot be installed via the 'pip' command.
...	...	@@ -166,17 +166,47 @@
166	166	(% class="box infomessage" %)
167	167	(((
168	168	**Screencast** - terminal
169		-\\(% style="color:#000000" %)python3
	187	+\\(% style="color:#000000" %)python
170	170	\\import nest
171	171	\\exit()
172	172	)))
173	173
	192	+(% class="box warningmessage" %)
	193	+(((
	194	+**Note:**
	195	+\\I find that I receive a "no module named nest" error, when trying this right after installing NEST. But it succeeds after a restart. So if you do observe an error, close all programs and restart your computer, and try again. This time it should execute as expected.
	196	+)))
	197	+
174	174	If there are no error messages here, and the import is successful, then we have completed installing NEST simulator, and are able to load it on Python.
175	175
176		-We next move on to the third simulation, NEURON. The installation for NEURON is a bit more involved.
	200	+We next move on to the third simulator, NEURON. The installation for NEURON used to be more involved previously, but can now be easily completed using the 'pip' command:
177	177
178		-<< add more >>
	202	+(% class="box infomessage" %)
	203	+(((
	204	+**Screencast** - terminal
	205	+\\(% style="color:#000000" %)pip install neuron
	206	+)))
179	179
	208	+This installs the NEURON simulator on your system. To confirm that we have properly installed NEURON, we can test as follows:
	209	+
	210	+(% class="box infomessage" %)
	211	+(((
	212	+**Screencast** - terminal
	213	+\\(% style="color:#000000" %)nrngui
	214	+)))
	215	+
	216	+This will display the NEURON banner, which mentions the version amongst other info. Here, as we can see, we have now installed NEURON v8.0.0 on our system. Let us next verify that this is indeed accessible via Python.
	217	+
	218	+(% class="box infomessage" %)
	219	+(((
	220	+**Screencast** - terminal
	221	+\\(% style="color:#000000" %)python
	222	+\\from neuron import h
	223	+\\exit()
	224	+)))
	225	+
	226	+
	227	+
180	180	(% class="box successmessage" %)
181	181	(((
182	182	**Slide** recap of learning objectives