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Describing Python Keywords and Identifiers

by Scarlett Watson

Python, like every programming language, has its own rules and peculiarities. This post examines identifiers in python and naming standards.

Python is a popular high-level, object-oriented programming language. Since the Python Software Foundation released its first version in 1991, it has become the third most popular programming language worldwide.

Almost 48.24% of developers use Python to acquire data science outcomes, according to Statista.

Python online courses have proliferated in recent months. Online education has made Python classes available to students of all ages by following these rules.

Each programming language has its own collection of “keywords,” like spoken languages. Most modern programming languages employ keywords. If, else, while, for, break, etc. are common programming keywords. Python reserves these keywords.

Programming languages contain predefined keywords. Keywords are worthless. We store values in variables. Identifiers name classes, methods, and variables. Here, we’ll investigate python keywords and identifiers in python.

Identifiers Definition

Identifying and naming program components helps differentiate them. These are “identifiers in python.” User choices and needs determine label meanings. Class, function, variable, method, etc.

Except for naming constraints, python identifiers function similarly to those in other languages.

Variables, classes, and functions have unique names in Python, called “identifiers in python.” Therefore, using keywords as identifiers causes a software problem. Python identifiers respect rules. They are:

  1. Only alphanumeric characters, including _, are allowed. Name1 is a valid identifier.
  2. Python is case-sensitive; capitalization matters. Name and NAME are independent personas.
  3. Without spaces, enter the identification. “Student name” isn’t a valid variable name. Name the student instead.
  4. Names start with a letter or underscore. A number can’t start an ID. Python variable names can be name1 or _name1, but not 1name.

Keywords’ meaning.

Keywords can’t be used as function or variable names in Python. They clarify Python’s syntax and structure. Python 3.7 has 33 keywords. This sum may change over time. All other keywords appear in lowercase and must be used with case sensitivity.

Python’s reserved phrases are case-sensitive. Python keywords are reserved because they serve a specific purpose. Reserved words can’t be reinterpreted. Consider the context before using a protected word.

Case changes the reserved terms’ meaning. This word won’t be prohibited. Diagram showing Python’s restricted keywords. Python reserves 33 words. Int, float, import, if/else, True/False/None, etc. None, True, and False are capitalized. 

  1. True and False are Python Booleans. Any value is the logical operation’s result.
  2. And, or, and not are Python’s logical operators. These operators always yield a Boolean.
  3. If, elif, and else are decision control phrases.
  4. While and for control loops.
  5. The break and continue keywords are used to interrupt and resume loop iterations.
  6. The class keyword creates custom classes.
  7. The user-defined function construction keyword def Exception handling uses try, except, raise, and finally to handle unforeseen software difficulties.
  8. You can import any previous Python module using the form.
  9. Use global: this is to use an internal function variable outside of its scope.

Here’s an example of how to use keywords: if, otherwise, for, in, def False

What are Python’s Identifier naming conventions?

identifiers in python use unique naming conventions. Let’s see:

  1. Python variable and class names can include digits, characters, and underscores.
  2. Never start a name with a number; use a letter or underscore.
  3. Identifier names shouldn’t be all digits.
  4. Python is case-sensitive, like many other languages. Ash and ASH are different.
  5. Users won’t get an error if they enter an identification that begins with an underscore.
  6. PEP-8 suggests limiting identifier names to 79 characters.
  7. Identifiers and keywords shouldn’t share names. Typing help() followed by “keywords” can help users avoid typos.
  8. Class names that begin with a double underscore (__$) are not allowed. Here are private derived and base class data.

Python object naming (Examples)

identifiers in python can include digits and underscore as long as they meet the rules. Examples:

  1. You can use an underscore for an identifier’s first letter.
  2. Even if it looks weird, a single underscore (_) can be an identifier.
  3. Identifier names can be lowercase (alpha123).
  4. DoGs: naming conventions aren’t case-sensitive.
  5. Due to case variance, DRE, dre, and Dre are all considered different names.

Python name errors (Examples)

  1. Python doesn’t support many identifier names from other languages. Examples:
  2. 999 is used for non-numerical names. Identifiers only allow underscores ( ).
  3. Identifiers can’t be language-specific keywords.
  4. 123alpha isn’t a valid identifier.


Python is a popular programming language in the 2010s. It’s easy to use and less difficult than other recent programming languages.

Naming variables and constants is a fundamental Python notion. Identifiers are application-specific because they’re based on user input. To enhance productivity within a given time window, it’s best to follow commonly accepted naming practices. Hopefully, this essay helped you understand identifiers in python.

We comprehend python keywords and IDs. Python’s keyword and identifier constructions are different. Python’s keywords are also case-sensitive. Python keywords have a defined function. Classes, variables, and methods have identifiers. Keyword identification isn’t possible. Python developers must follow specific rules for creating valid IDs. We’ve covered Python IDs and keywords.

We hope you enjoy reading the magazine. Ask questions in the comments section.


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