I want to know the structure of a python program and how you connect it to outside world

Question

I have worked with compiled programming languages where you compile your final code to an *.exe file and it includes all the runtime libraries etc.

But obviously this is not the case with an interpreted language like Python. So I'm absolutely in dark. I want someone to show me a diagram or schematic of a Python code and how you put things together in a program.

Answer 1

This quote explains Python better than I could:

Often, programmers fall in love with Python because of the increased productivity it provides. Since there is no compilation step, the edit-test-debug cycle is incredibly fast. Debugging Python programs is easy: a bug or bad input will never cause a segmentation fault. Instead, when the interpreter discovers an error, it raises an exception. When the program doesn't catch the exception, the interpreter prints a stack trace. A source level debugger allows inspection of local and global variables, evaluation of arbitrary expressions, setting breakpoints, stepping through the code a line at a time, and so on. The debugger is written in Python itself, testifying to Python's introspective power. On the other hand, often the quickest way to debug a program is to add a few print statements to the source: the fast edit-test-debug cycle makes this simple approach very effective.

https://www.python.org/doc/essays/blurb/

These are typed in this textbox, not tested, but they should give you an idea of how easy Python is to jump in to and how advanced it can get. If you have any questions or concerns, please, feel free to ask.

# Python v3.7 is fantastic! These are comments.

print("This is me printing to the console.")

# This is me creating an integer variable.

var1 = 1

# This is me assigning a different value to that same variable with

# a different type.

var1 = "1"

# Now it is a string.

# A simple function adding two numbers.

def add(num1, num2):

return num1 + num2

# Here's a class that inherits `Object`.

class Cls1(Object):

# __init__ is the constructor, `self` is not a parameter per se but

# itself, the actual instance of the object (in this case the class).

def __init__(self):

self.initialized = True

obj = Cls1() # Creates an instance of Cls1, almost like a function.

print(obj.initialized) # Prints `True`