Using the compile() function we can convert a source to a runnable code object.
compile (source, file_name, mode, flags=0, d optimize=-1)#where source can be String,a byte string,or abstract syntax tree
The compile function takes a source as the main input. The other parameters are the source code’s filename, mode to indicate the type of the source, flags, and dont_inherit for indications to the compiler and optimize to specify the level of optimization
| Parameter | Description | Required / Optional |
|---|---|---|
| source | String, a byte string, or abstract syntax tree(AST) | Required |
| file_name | File which is having the source, if source not from a file any name can be given | Required |
| mode | 3 possible values - eval: If the source is a single expression single: If the source is a single interactive statement exec: If the source is a block of statement |
Required |
| flags | Default zero indicates which future statement affects compilation | Optional |
| dont_inherit | Default False, indicates which future statement affects compilation | Optional |
| optimize | Optimization level of compiler, default -1 | Optional |
Depending on the parameters passed the source will be converted to a python code object.
| Input | Return Value |
|---|---|
| Python Source | Python Code object |
pythonSource = 'n1 = 10\n n2=20\nsum=n1 + n2 \n print("sum =",sum)' pyth pythonSource,'randomName','exec')
exec(pythonCodeObj)
Output:
sum = 30
pythonSource = 'print("Hi , I am a single statement)' pyth pythonSource,'randomName','eval')
exec(pythonCodeObj)
Output:
Hi I am a single statement
