python-tutorial

* This tutorial was written by referring to opentutorials.org.

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Ch 1. Basic Principles of Python

python language - Shell/File - Interpreter - OS

• Shell: interacts directly with python, Interactive mode
• File: multiple instructions stored in advance

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Ch 2. Data types

List

ex) students = ["egoing", "sori", "maru"]

String

ex) print('Hello world')

Numeric

ex) print(1)

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Ch 3. How to Read Manuals / Variables

How to read manuals

1. You can find the manual here

   • Pay attention to Tutorial, Library Reference, Language Reference

   • Language Reference is not for beginners

2. Use Google

Variables

ex) name = "egoing"

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Ch 4. Debugging

1. print()
2. debugger
   • Python built-in debugger isn't useful
   • Use the debugger provided by editors
     • VSCode debugger
   • Red circles are break point
   • Yellow Pentagon indicates the line of code to be executed

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Ch 5. input & output

ex) name = input('name : ')

Values for the variables can be entered directly from the user.

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Ch 6. PyPi

standard library: python built-in module
package: Software made available to other developers
pypi.org: Python package index, a database that allows you to store and search packages made of Python.
Pandas: One of the packages used for data analysis, type "pip install pandas" to install.

• pip: Software that helps you easily install packages stored on your computer at pypi.org site using pip.

how to install pandas in VSCode

python3 -m pip install pandas

• Beware of the path setting

CSV: Comma Separated Value

• head shows the first ( ) lines
• describe analyze by columns