Python variable naming conventions and examples

Python variable naming conventions and examples

As a commonly used programming language, Python has a strict set of variable naming conventions, which is to increase the readability of the code. stability, maintainability and standardization. In this article, we will introduce the specifications of Python variable naming in detail and provide some specific code examples for reference.

1. Variable naming convention
   In Python, variable names should follow the following specifications:

1.1 Variable names consist of letters, numbers, and underscores, and cannot start with numbers. .
1.2 Variable names are case-sensitive.
1.3 Variable names cannot conflict with Python keywords, such as if, for, while, etc.
1.4 Variable names should be as concise and clear as possible, and can accurately describe the meaning of the variable.
1.5 Variable names should use English words or abbreviations of words, and avoid using Chinese or Pinyin.

2. Variable naming examples
   The following are some common variable naming examples to help readers better understand Python variable naming conventions.

2.1 Ordinary variables
count = 0 # Counter
total_amount = 100 # Total amount
is_valid = True # Is it valid
user_name = "John" # Username

2.2 List variable
students = ["Jack", "Mary", "Tom"] # Student list
scores = [80, 90, 85] # Score list

2.3 Tuple variable
point = (3, 5) # Coordinates of point

2.4 Dictionary variable
student = {"name": "Tom", "age": 18, "gender" : "male"} # Student information

2.5 Class variable
class Student:

def __init__(self, name, age):
    self.name = name
    self.age = age

stu1 = Student("Alice", 20)
stu2 = Student("Bob" , 21)

2.6 Constant variable
PI = 3.14159 # Pi
MAX_SCORE = 100 #Highest score

2.7 Function variable
def calculate_area(radius):

return PI * radius * radius

3. Variable Naming Tips
   In addition to following naming conventions, there are also some variable naming techniques that can improve the readability and understandability of the code.

3.1 Use meaningful names
Variable names should be representative and be able to clearly express the meaning of the variable. Avoid using meaningless names.

3.2 Use camel case naming method
For variable names of compound words, you can use camel case naming method and capitalize or lowercase the first letter to distinguish the words.

3.3 Use underscore naming method
For variable names composed of multiple words, underscores can be used to separate the words to improve readability.

4. Summary
   Python variable naming convention is an important coding convention, which not only improves the readability and maintainability of the code, but also unifies the code specifications. When naming, we should follow unified specifications and choose meaningful names to better understand and manage the code.

Through the introduction of this article, we have learned about the specifications of Python variable naming, as well as some common naming examples. I hope these examples can help readers better understand the methods and techniques of Python variable naming. In the actual programming process, we should comply with these specifications as much as possible and name variables according to specific application scenarios to improve the readability and maintainability of the code.

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