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Python compile() Function

The python compile() function takes source code as input and returns a code object which can later be executed by exec() function.


compile(source, filename, mode, flag, dont_inherit, optimize)


  • source - normal string, a byte string, or an AST (Abstract Syntax Trees) object.
  • filename - File from which the code is read.
  • mode - mode can be either exec or eval or single.
    • eval - if the source is a single expression.
    • exec - if the source is block of statements.
    • single - if the source is single statement.
  • flags and dont_inherit - Default Value= 0. Both are optional parameters. It monitors that which future statements affect the compilation of the source.
  • optimize (optional) - Default value -1. It defines the optimization level of the compiler.


It returns a Python code object.

Let's see some examples of compile() function which are given below:

Python compile() Function Example 1

This example shows to compile a string source to the code object.


<class 'code'>
sum = 15

Python compile() Function Example 2

This example shows to read a code from the file and compile.

Let's say we have file with following content.

We can read this file content as a string ,compile it to code object and execute it.


Multiplication =200

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