In Python, what is the difference between a keyword and an identifier?

In Python, what is the difference between a keyword and an identifier?
8 min read

Python, like many other languages, has its guidelines for creating applications. identifiers in python and naming conventions are discussed in this article.

Python is widely used because of its high-level and object-oriented nature. Since its original release by the Python Software Foundation in 1991, Python has risen to become the world's third most popular language for creating software.

According to Statista, 48.24% of developers use Python to achieve effective outcomes, making it one of the most sought-after data science talents alongside R and SQL.

There has been a recent explosion of Python training materials available online. Because of the accessibility of online learning, many Python courses are now available to students of any age who meet the prerequisites.

Computer languages, like spoken languages, contain vocabulary terms known as "keywords." As a rule, you'll use keywords in your code. The if/else/while/for/break construct is used in nearly all modern high-level programming languages. These terms are protected in Python.

It is usual practice in computer programming to define each keyword used in the language. Empty search terms. Typically, values are stored as variables. The names of variables, methods, and classes are all identifiers in python. We'll examine Python IDs and keywords here.

An Explanation of What an Identifier Is

Names are required for software components to be easily distinguished. These are labeled as "identifiers in python" The significance of these terms is determined by the preferences and requirements of the user. Concepts like classes, functions, variables, and methods.

Except for the language's naming conventions, Python identifiers function similarly to their counterparts in other languages.

Variables, classes, and functions all have unique names, or "identifiers in python." So, using keywords as identifiers results in flawed code. There are conventions for using identifiers in Python. List:

  1. Characters other than letters, numbers, and underscores (_) are not allowed in the ID. Label the first student in this class.
  2. A case of the Pythons. There will be no confusion between name and NAME.
  3. Make sure there are no gaps between the identifier and the input. Student name is not a field that can be changed. Cite the student by name.
  4. Names should begin with a letter or an underscore. No numeric identifiers are allowed as the primary identifier. Name1 and _name1 are acceptable names for Python variables, however, 1name is not.

Meaning of a Keyword

Keywords are not allowed in Python's variable or function names. Their explanations make Python's syntax and architecture clear. There are 33 keywords in Py3.7. This sum may go up or down. Case sensitivity is required for all keywords save the three aforementioned truncated phrases: true, false, and none.

Python's case sensitivity extends to its reserved phrases. The reserved keywords in Python have a very specific purpose. Restricted words cannot have their meaning altered. When to use a taboo word is situational.

The reserved sentences lose all of their significance when their case is changed. This word will once again be in vogue. Python's special words are displayed graphically here. Python saves 33 characters for reserved text. Numbers, strings, and logical operators such as True, False, None, and if/else/else if are also supported. Except for None, True, and False, all other keywords are lowercase.

  1. The only two possible values for a Python Boolean are True and False. This is the range of results that can be expected from logical operations.
  2. Python supports and, or, and not. Every result from these operations is a Boolean.
  3. If, if, and else are the building blocks of the decision control architecture.
  4. While and for are used in loops.
  5. Combining a pause with a continuation In a control system using a loop, you can pause and resume iterations as needed.
  6. If you want to make your class, you can do so with the class keyword.
  7. define Make your custom functions.
  8. Exception handling is the process of responding to software faults with the use of the keywords try, except, raise, and finally.
  9. Using the form and the importing keywords, you can incorporate any Python module into your namespace.
  10. The use of global allows a variable defined within a function to be accessed outside of that function's context. 

The use of these Python-reserved keywords is widespread. Some common terms and their contexts are listed below. because, since, if, nevertheless, unless, otherwise Yes, No

Why are Python identifiers named the way they are?

Follow Python's naming conventions for variables and other identifiers in python. Let's have a look at that:

  1. Any string of digits, letters, and underscores can be used as a name for a Python variable or class.
  2. Names should always begin with a letter or underscore.
  3. Names for identifiers should not be numerals.
  4. Like many other programming languages, Python is case-sensitive. It's important to note that Ash is not ASH.
  5. There will be no issue if you begin an identifier with an underscore.
  6. As per PEP-8's recommendations, identifier names should be no longer than 79 characters.
  7. Both identifiers in python and keywords should have unique names. To see a complete list of all Python keywords (and so prevent making any errors), enter help() followed by "keywords."
  8. No double-underscore ($) can be used as the first character in a class name. Private information for both derived and base classes can be found here.

If these instructions are not followed, the program may become unresponsive or show error messages.

Names of PyObjects (Examples)

identifiers in python are case-insensitive and can include letters, numbers, and underscores. Examples:

  1. can be used as the first letter of an identifier.
  2. Although it may look strange, a single underscore (_) can serve as a valid name for a unique identifier.
  3. Names may begin with lowercase characters (alpha123).
  4. When referring to canines, it is not necessary to capitalize names.
  5. DRE, dre, and Dre will be treated as three separate names because of the case differences between them.

Names that aren't in Python (Examples)

  1. For some reason, Python rejects some potential names for identifiers. Examples: \sx+iy: Utterly restricted to using only underscores in identifiers ( ).
  2. Language keywords cannot be used as identifier names.
  3. The ID "123alpha" does not exist.


Even in the present day, Python is still widely used. In comparison to other modern programming languages, it is much easier to learn and work with.

Naming variables and constants is an important part of learning Python. Because they are derived from input, identifiers are highly application-dependent. You can use names, but only if they conform to the established naming conventions. Yet, using consistent nomenclature across disciplines may increase output in a given period. Hopefully, you've gained a foundational understanding of identifiers in python from this essay.

Identifying terms and keywords in Python are familiar to us. We also talked about the distinctions between Python's keyword and identifier constructs. Furthermore, Python is case-sensitive when it comes to keywords. Many uses for Python keywords are hard-wired into the language. Names for classes, variables, and procedures are called identifiers. It is not possible to identify keywords. The rules for creating valid IDs in Python are strict. The discussion on identifiers in python and keywords is now over.

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Scarlett Watson 1.2K
I am a professional writer and blogger. I’m researching and writing about innovation, Blockchain, technology, business, and the latest Blockchain marketing tren...

I am a professional writer and blogger. I’m researching and writing about innovation, Health, technology, business, and the latest digital marketing trends. 

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