Popular Programming language created by Guido Van Rossum, released in 1991.
Web development (server-side)
software development
API
Machine Learning Models
Device Software
system scripts
can perform complex mathematics and handle big-data.
Cross platform support.
simple syntax similar to English language
Can develop with fewer lines
Procedural way, object-oriented way or functional way
Python runs on python virtual machine interpreter to execute its bytecodes. Unlike other languages python doesnt generate machine code. it generates bytecode after compilation and we need interpreter to execute the bytecodes.
if you have a file called "prog.py"
step 1 - compiler reads the source file and check for any syntax errors, if found any stops the execution and displays the error message.
step 2 - if no error found compiler translates source code to bytecode.
step 3 - byte code will be executed through python virtual machine (interpreter) this pvm takes care of the conversion of bytecode to machine code.
sourcecode: (Human understandable code) Code which is in high-level language.
bytecode : Code which results from compilation of source code. Virtual machines processes bytecodes. Interpreter translates bytecode to machine code.
Any system which has virtualmachines irrespective of OS
can run the byte code thus makes it independent of OS.
Machinecode: (binary formatted code) Code that Machine (CPU) can read and understand directly and process it. We get to this machinecode stage after interpretation or compilation.
what is garbage collection ?
Other languages such as C, the memory allocation
can happen manually. Where as in Python user dont have access to
the Python Heap space.
All those unsed or unreferenced objects in python
will get deleted by this garbage collector by using
reference counting mechanism
When number of object references goes to zero, then it deletes the object.