What Is Operation

This section provides a quick introduction operations. An operation is a sequence of lexical tokens in Python source code that invokes a predefined action on one or two data objects.

What Is Operation? An operation is a sequence of lexical tokens in Python source code that invokes a predefined action on one or two data objects.

A typical operation has 3 components which are written in this syntax:

operand_1 operator operand_2

where:
  operand_1 is the first object involved in this operation
  operand_2 is the second object involved in this operation
  operator is the symbolic name of this operation

Notes on the above operation syntax:

1. The action of the operation is determined based on the operand object type and the operator symbolic name. For example:

# an "add" operation generating a new "int" object
# by adding two "int" objects
>>> 10 + 5
15

# a "concatenation" operation generating a new "str" object
# by concatenating two "str" objects
>>> "pine" + "apple"
'pineapple'

2. If an operation only requires one operand object, it is called a unary operation, which is written in this syntax:

operator operand

where:
  operand is the object involved in this operation
  operator is the symbolic name of this operation

For example:

>>> x = 9.8
# "-" is the negation operator on "float" objects
>>> - x
-9.8

# "not" is the NOT operator on "bool" objects
>>> not True
False

# "~" is the Bitwise NOT operator  on "int" objects
>>> ~ 10
-11

3. Whitespaces between operator and operands are optional. For example:

>>> 10 + 5
15

>>> 10+ 5
15

>>> 10     +5
15

To know what operations are supported for a given data type, you need to read the data type reference document. Visit "Built-in Types" document Website at https://docs.python.org/3/library/stdtypes.html to see all operations supported for each built-in data type.

Table of Contents

 About This Book

 Running Python Code Online

 Python on macOS Computers

 Python on Linux Computers

 Built-in Data Types

Variables, Operations and Expressions

 What Is Variable

What Is Operation

 What Is Expression

 Conditional Expression - Ternary Operation

 Assignment Expression - Walrus Operation

 Statements - Execution Units

 Function Statement and Function Call

 Iterators and Generators

 List, Set and Dictionary Comprehensions

 Classes and Instances

 Modules and Module Files

 Packages and Package Directories

 "sys" and "os" Modules

 "pathlib" - Object-Oriented Filesystem Paths

 "pip" - Package Installer for Python

 SciPy.org - Python Libraries for Science

 pandas - Data Analysis and Manipulation

 Anaconda - Python Environment Manager

 Jupyter Notebook and JupyterLab

 References

 Full Version in PDF/EPUB