Python compiled files

For this, you have to compile Python py file without executing it. We import modules in our program. If you are importing module first time, Python compiles the module code and create. It is nothing but the bytecode file. In another scenario, if there is any change in code, python compiles the code and save it as bytecode.

In this case, if you are running Python code, it may run existing old. This is the worst behavior to trace. I still remember when I faced this issue. I was updating my code in a python script, but when I run the code, I was amazed not to see any changes in output even after doing changes in the Python script. There is a function called compile. Pass the Python file name that you want to compile as an argument. It will convert Python script into the bytecode file with the file extension pyc.

This will compile the abc. Python stores bytecode in the same directory where the abc. Compile a source file to byte-code and write out the byte-code cache file. The source code is loaded from the file named file. If dfile is specified, it is used as the name of the source file in error messages instead of file. If doraise is true, a PyCompileError is raised when an error is encountered while compiling file.

If doraise is false the default , an error string is written to sys. This function returns the path to byte-compiled file, i. The doraise and quiet arguments determine how errors are handled while compiling file. If quiet is 0 or 1, and doraise is false, the default behaviour is enabled: an error string is written to sys. If doraise is true, a PyCompileError is raised instead.

Basically interpreted languages simply means you have a set of instructions and the interpreter will read each and every line one by one then it will start executing everything line by line.

Now your bytecode is interpreted. I heard you asked; the answer is only for one reason we use a concept of bytecode to achieve portability. Let me explain: this term; portability; simply means independence that you can write code once and you can run on different platform. To solve this problem, we have a concept of virtual machine.

In this virtual machine what you run is a bytecode then this bytecode will run on that virtual machine and that will convert into native code. When I say virtual machine, are you thinking about VMware or something. Basically you write a Python code which gets compiled which is the bytecode. That bytecode will be interpreted on your PVM to give you the actual output then the question that arises is: when you are running Python you never did that?

We simply say Python then we mention the filename. You simply say Python and the file name I will compile it and I will give you the bytecode and then that bytecode will run on your PVM. What about interactive shell? The answer is: yes Behind the scene whatever you do and Python, it creates a bytecode first and that byte code gets run on PVM. Another Python code to demonstrate working of compile. Note eval is used for single statement. Another Python code to demonstrate. Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.

Next Python All possible permutations of N lists. Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert.