python venv tutorial

Programming/Python/Useful_codes/Python_enviroment/README.md

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+# How to create a new python environment:
+
+These are the basic commands to add and install some packages:
+
+1. `python3 -m venv science`
+2. `. science/bin/activate`
+3. `pip install -r science_requirements.txt` 
+
+** Note, **science** is just a name example, and **science_requirements** is just an example of commonly used python packages.
+
+I usually add an alias to `.bashrc` (or whatever you use) to activate the python env:
+
+```
+# Python venv
+alias science='source /home/user/.virtualenvs/science/bin/activate'
+```
+
+Reference: [Creating-virtual-environments](https://docs.python.org/3.3/library/venv.html#creating-virtual-environments)

Programming/Python/Useful_codes/Python_enviroment/science_requirements.txt

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+h5py
+numpy
+matplotlib
+pandas
+pydicom
+scikit-image
+scipy
+spyder
+opencv-python
+tqdm
+tensorboard