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Best Python Interpreters to Use in 2023

Python is a definition for the Scripting language, which may be used in various ways. The scripting language Python employs many interpreters, each of which is different. Plenty of Python interpreters are available since it will be the programming language with the highest growth in 2023. However, because they all cater to different needs, you must first decide which is best for you.

Let's first gain a basic understanding of an interpreter before describing six of the most common Python interpreters.

What is an Interpreter?

An interpreter is a specific kind of computer software that, by definition, carries out the commands expressed in a coding or scripting language. The term "direct execution" refers to the lack of a need for the instructions first to be built into a code that is translated.

Python Interpreter

It has been said that Python is an interpreted programming language in numerous publications and websites. It has some validity. This is due to the internal workings, which are still largely abstract or, in the words of many Python developers and programmers, mysterious. Unlike other programming languages, Python does not translate its source code into machine-readable instructions so that the hardware can comprehend it. Instead, it converts the source code into a format known as byte code.

Thus, Python's compilation as an abstract form occurs, but unlike other compilers like C++ and C, Python's compilation does not reduce the entire program to the processor or assembly level. Additionally, keep in mind that opcode and assembler-level instructions are different. The fundamental difference between these two is that assembly language is developed for a CPU, whereas bytecode is generated for a VM and a virtual machine.

The Python Interpreter is simple to use and has the following features:

  • Engaging editing
  • Use variables that were initialized in the earlier prompts
  • Using a readline facility, writing the entire code in it.
  • Pressing Ctrl+P will bring up command-line editing, and a beep will sound to let you know the mode is active.

After that, let's move on to a quick description of the most widely used Python interpreters:


CPython is an interpreter that provides a foreign function interface with C and other programming languages. It was created in C and Python. It is the Python programming language's default and most popular implementation. CPython Supports Up to version Python 3.7

The maximum compatibility with Python packages and C extension modules is provided by CPython, which is the standard Python implementation. Because it turns Python code into bytecode before interpreting it, CPython may also be categorized as a compiler. It employs a Global Interpreter Lock (GIL), which has the drawback of preventing concurrent Python threads for a process. As a result, C is used to implement all Python programming versions.

Python packages that require C extensions to work correctly can only be used with CPython. To promote a Python programming language applied to the largest potential audience, they must target CPython.

Features of CPython:

  • One unique aspect of CPython is that each process uses a global interpreter lock (GIL), which prevents more than one thread from processing Python bytecode concurrently inside a single process. This is not to say that multithreading is useless; the most typical multithreading situation involves threads that spend most of their time waiting for other processes to finish. This may occur when several threads are taking care of various customers.
  • While the third thread performs Python code, the first two threads may be waiting for a client to respond, and the third might be waiting for a database query to run.
  • The GIL does, however, imply that CPython is not appropriate for processes that use Python code to implement CPU-demanding algorithms that could be dispersed over several cores.
  • Situations, where the GIL represents a severe impediment in real-world programs are extremely uncommon.
  • Python is typically not utilized for CPU-intensive or time-sensitive processes because it is a naturally sluggish language.
  • Python is frequently utilized at the top level for specialized tasks and uses functions in libraries. While a call to one of these underlying processes is being made, Python code on another thread may still be running because these libraries often need to be written in Python.
  • The non-Python library used to carry out the computationally expensive activity is not covered by the GIL and may run simultaneously.

How is CPython different from other Interpreters?

Only distinct CPython interpreter processes controlled by a multitasking operating system can enable Python code to run concurrently. This makes it more difficult for concurrent Python processes to communicate with one another. However, the multiprocessing module slightly mitigates this. As a result, applications that would benefit from concurrent Python-code execution may be developed with relatively little overhead.

The GIL makes it simpler to construct multi-threaded applications without taking advantage of concurrent Python code execution and to develop CPython. Multiprocessing programs must ensure that all common code is thread-safe without a GIL.

Although there have been several proposals to do away with the GIL, it is generally agreed upon that in most situations, the benefits exceed the drawbacks; in the few instances where the GIL acts as a bottleneck, the app should be designed around the multiprocessing framework.


IronPython is a.NET framework version of the Python programming language that makes use of both the Python and.NET framework components. It may also make Python code accessible to other.NET framework languages. IronPython Supports Up to version Python 2.7

Dynamic compilation is supported by IronPython, which also includes an interactive console. The Python interpreter enables interaction between Python scripts and.NET objects. IronPython is natively incorporated into the Visual Studio IDE using the Python Toolbox for Visual Studio.

IronPython may be of different to CPython programmers for the following reasons:

  • Corporate credibility: Adding new technologies can be quite challenging in some organizations; however, if.NET is already well-established, employing IronPython may not be necessary.
  • No GlobalInterpreterLock - Multi-threaded programming may leverage multi-core processors since IronPython lacks GIL.
  • The library for the.NET framework is enormous. The user interface library Windows Forms, in particular, is excellent.
  • Silverlight! IronPython is easier to expand than CPython (C# is fully managed and C# types may be used straight in IronPython with no encapsulation) and is straightforward to incorporate as a scripting language in.NET applications.


Jython, formerly known as JPython, is a Java platform-based Python implementation. Jython, which was created in Java and Python, transforms Python code into Java bytecode, enabling Python code to execute on any platform equipped with a JVM.

The Jython reads the whole high-level source code or instructions. The syntactic phase follows, which checks the syntax of each program line to ensure that the instructions are formatted correctly. If a problem occurs, it immediately halts translation and displays an error message.

For both static and dynamic compilation, Jython offers support. The well-known Python interpreter's ability to import and use any Java class as a Python module is a significant feature. Jython Supports Up to version Python 2.7

You may put your money on Jython if you need to interact with a pure Java codebase or build Python code for the JVM.

Usage of Jython

  • Jython scripting is supported by the command line interface of the JBoss Application Server, the Oracle Weblogic Server Scripting Tool, the IBM Rational development tools, and the IBM WebSphere Server Software tool utilizing wsadmin.
  • Ignition is a software design platform with an emphasis on HMI and SCADA.
  • Ghidra is a reverse engineering tool created by the NSA that allows plugins to be built in Java or Jython.
  • OpenHAB is home automation software.
  • ZK is a Java Ajax framework that supports glue logic written in Jython.


A quick and compliant alternative Python programming language implementation is PyPy. The restricted statically-typed subset of Python called RPython is used to implement the Python interpreter. PyPy Supports versions - Python 2.7, Python 3.5, and Python 3.6.

The co-developed language RPython is used to construct PyPy. A subset of Python called RPython (Restricted Python) limits the Python language to speed up execution. Its speed is the primary justification for using it instead of CPython. Particularly, compared to CPython, it typically runs 4.4 times quicker. PyPy implements Python 2.7.13 and 3.6.9. It supports all essential languages and completes most Python 2.7 and Python 3.6 test suites (with minor modifications). The majority of the frequently used Python header file modules are supported. This indicates that, for the most part, your Programming language will execute without needing any adjustments.

Features of PyPy:

  • PyPy supports CLI, C, and JVM back-ends and has a JIT compiler.
  • The main objective of PyPy is to maximize compatibility with the benchmark CPython implementation while boosting performance.
  • Python programmers that want to improve the performance of some particular Python programs utilize PyPy.
  • The popular Python interpreter is 4.4 times quicker than CPython, according to the PyPy website.
  • Using a meta-tracing method, PyPy executes code that includes compilations during runtime by turning an interpreter into a tracing JIT (just-in-time) compiler.
  • In addition to operating more quickly than Python, it also makes better use of memory.

Additionally, it has excellent compatibility with some of the most popular Python libraries.

Some of them are:

  • sqlalchemy
  • Lxml
  • twisted
  • ctypes
  • flask
  • pylons
  • divmod's nevow
  • Pillow
  • pyglet
  • django
  • NumPy

Disadvantages of PyPy

PyPy is unable to run every line of Python code. The Python code may need to be modified to run. Although the external C-API has been reimplemented in PyPy, some C-abstractions are occasionally leaked onto CPython and misused-possibly even without the user's knowledge. Due to the time needed to load and compile the bytecode necessitates a "Warm-up" time, which results in a very tiny to very apparent delay in the beginning execution of an application. The performance of the execution will suffer the smaller it is.

A native Python installation may be almost completely integrated with the.NET CLR using PythonNet. Its strategy is the opposite of what the IronPython does. The compilation phase is completed before any code execution for a Python coder. The Python Virtual Machine (PVM), which comprehends the underlying structure and platform (operating system), transforms this generated byte code internally so that the program may run and produce the intended results. PythonNet Supports versions ranging from Python 2.6 to Python 3.5

PythonNet enables a native Python deployment on a non-Windows operating system to function within the.NET framework in conjunction with Mono. PythonNet and IronPython may be used together without any problems.

Stackless Python

The stack of CPython and other well-known Python interpreters depends on the C call. With the Stackless Python interpreter, this is different. Stackless Python was created using C and Python, just like CPython. Stackless Python uses the C stack but is wiped in between function calls. As a result, the stack of the Python interpreter is independent of the C call.

Stackless Python supports connectivity, coroutines, precompiled files, round-robin planning, task serialization, and tasklets in addition to threads. Microthreads are arguably Stackless Python's most significant feature. The functionality aids in reducing the overhead brought on by common operating system threads. Stackless Python Supports Up to version Python 3.7


  • With Stackless Python, an executing program is divided into micro threads controlled by the python interpreter rather than the operating system kernel.
  • Since the interpreter entirely handles task scheduling and context switching, this is sometimes referred to as a type of green thread.
  • Micro threads control how several software subtasks are executed on the same CPU core.
  • Therefore, they are an alternative to the occurrence of asynchronous computing and avoid the expense of having multiple threads for single-core applications because no mode changing from user mode and operating systems needs to be done, allowing CPU utilization to be decreased.
  • Stackless Python does not eliminate CPython's Global Interpreter Lock and employs multiple threads and processes, even though micro threads make managing the execution of subtasks on a single core easier.
  • As a result, parallelism is not supported; only cooperative multitasking is (preemption was originally not available but is now in some form).
  • Building an interprocess communication mechanism on top of Stackless Python processes would require utilizing multiple CPU cores.
  • Stackless Python cannot be deployed as an extension or library on an already-existing Python installation because of the significant number of changes in the source code.
  • Instead, it functions as a full Python distribution on its own. PyPy, a self-hosting Python interpreter and JIT compiler, has also been updated to include the bulk of Stackless' functionality.


Python was created from the bottom up with large-scale programming in mind.

Transcrypt supports multiple inheritance, local classes, and hierarchical modules, enabling a flexible yet reliable overall structure. A static type validator, a linter, and a minifier are included in Transcrypt to facilitate efficient teamwork on large-scale projects. Python is employed everywhere at the back end, from web applications to scientific computing. It is now also usable on the front end. Transcrypt operates on top of Node.js and provides easy access to any JavaScript library.

Transcrypt does not require proprietary additions and has the same powerful, straightforward syntax that Python is known for. Out of the box, it supports matrix and vector operations with +, -, *, /, and more and string slicing with [i:j:k]. Your websites load as quickly as ever since the JavaScript target, and Python source codes are nearly the same size.


  • Transcrypt has Clear standard syntax.
  • It precompiles to quick, understandable JavaScript that can be debugged using source maps from the Python source code.
  • Transcrypt has Superior scalability.
  • Transcrypt supports One project, one language.


  • JavaScript that has been precompiled into a highly legible, efficient format downloads in kB rather than MB.
  • Pure Python 3.9 syntax, using Python's native parser .
  • Multiple inheritances, decorators, metaclasses, properties, hierarchical modules, optional operator overloading, async/await, etc.
  • Requires continuous with the universe of high-quality internet Plug - ins rather than the MacBook Python ones.
  • Produces JavaScript for humans similar to the Python source code line by line and optionally tagged with source line numbers. Directly debug from the Python source code using integrated sourcemaps.
  • It runs on top of node.js and has Lightning-fast Typescript 6 code: for-loop optimization, call caching, in-line JavaScript, etc.
  • Extensive documentation with lots of code examples Apache 2.0 license, Pip-install and go!

Main differences with CPython

  • Web batteries: Access to any JavaScript library that is already available has been prioritized over including several Python libraries in the installation. A few libraries that are significant in the browser are an exception to this rule, such as cmath, datetime, itertools, math, re, random, time, and turtle. However, in general, this rule is broken.
  • Transcrypt is designed to let developers create comprehensive, real-world online apps that are as professional and quick to load as their JavaScript equivalents while also being easier to maintain and offering a Pythonically clean, modular structure. No Python code is evaluated or executed. Again, this is a component of the idea. To ensure quick page loading, transcrypt code is already built, optimized, and minified. Its design objective is fundamentally distinct from tools that compile in-browser on the fly in this regard.
  • Periphery refers to all other components of Transcrypt. Even if a well-written pull request for the perimeter has a fair chance of getting granted, it is still advisable to open an issue first to allow for cooperation and reduce effort waste.

Putting in place standard libraries takes a specific position. Even though Transcrypt mostly relies on browser-specific JavaScript libraries, the availability of a few common libraries will aid in its acceptance by Python programmers. Therefore, you are more than welcome to contribute here. Better 90% complete, quick, tiny, and dependable than 100% complete, sluggish, big, and buggy is the design objective. If you provide a library, kindly donate an autotest (see documentation) and some supporting materials. The supported operating systems are Linux and Windows.

Python 2 or Python 3? Which One to Choose?

  • It has always been crucial to consider whether to continue with the more traditional Python 2 or adopt the most recent Python 3 since Python 3 in 2008.
  • For individuals who are just learning Python, the solution could be straightforward: begin with the more recent and improved Python 3. The decision may be more complex for businesses or individuals with sizable Python codebases that significantly rely on Python for their operations.
  • As of right now, Python 2.7 is used by the majority of apps. The switch to Python 3 is, nevertheless, happening more frequently now. This is mainly because Python 2.7 will get security patches within 2020.
  • You could build a new open-source Python library for both Python 2 and Python 3 if you're developing one. This is because a sizable number of Python developers still choose Python 2. You must use Python 3 to create new Python apps.
  • Because each new version of the Python 3.x interpreter provides better bug fixes, security, and standard library modules, using the most recent version is advised.
  • If you already have Python 2 code or a unique library, do you need to stick with it?

It's acceptable if you genuinely adore Python 2 and don't want to switch to Python 3. However, keep in mind that Python 2 won't be as lucrative as it is now after 2020. Therefore, it might be a good idea to use Python 3 alongside Python 2.

Quick Summary

The list of the six most widely used Python interpreters is comprehensive. Any of them will work for you. But each of them has advantages of its own. Therefore, making informed decisions is best, especially if you're working professionally. I hope this tutorial has clearly outlined what a Python interpreter is made out of. This tutorial also explains the Python interpreter's processes to achieve the overall compilation and understanding of high-level instructions utilizing PVM. It could be beneficial to have a working understanding of many Python interpreters. Therefore, it is best to attempt more.

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