Important Python code snippets and concepts that you should know as a beginner:

1.  Print statement - for printing output to the console.
2. Variables - for storing values, e.g. x = 10.
3. Data types - including integers, floats, strings, and more.
4. Lists - for storing multiple values in a single variable, e.g. list = [1, 2, 3].
5. For loops - for repeating actions a set number of times.
6. If-else statements - for making decisions based on conditions.
7. Functions - for organizing code into reusable blocks.
8. Classes and objects - for creating and using object-oriented programming.
9. Dictionaries - for storing key-value pairs, e.g. dict = {'key': 'value'}.
10. Modules and packages - for organizing code into reusable modules and packages.

Additionally, here are some important Python libraries and modules that you should know about:

1. NumPy - for numerical computing in Python.
2. Pandas - for data analysis and manipulation.
3. Matplotlib - for data visualization.
4. SciPy - for scientific computing in Python.
5. Scikit-learn - for machine learning in Python.
6. TensorFlow - for deep learning and artificial intelligence.
7. Pygame - for game development in Python.
8. Django - for web development in Python.
9. Flask - for lightweight web development in Python.

These are just a few examples, but there are many more concepts and libraries in Python that are worth exploring. To truly master the language, it's best to start by learning the basics and gradually expanding your knowledge.