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=== Some Python vocabulary ===

* A string or string object is a MODULE in Python 

* '''A MODULE''' is a file, which contains Python statements.

Normally among these there are:
** definition statements - the execution of the module defines some functions 
** class statements - the execution of the module defines some classes. 

A module may also contain names (variables) and other directly executable Python statements.
** you can write your own definitions/functions and save them I a file that you can import into another python-file
** such a document is an external module, called at the beginning of a script using 'import name_module'


* '''CLASSES''' contain '''METHODS''', a series of FUNCTIONS that are part of a class

The string-module contains classes with functions that allow you to calculate the length of the sting, slice etc

* Anything in Python can be an '''OBJECT''', because it can be assigned to a variable or can be an argument (input) for a function - see also OBJECT ORIENTED PROGRAMMING 

* An '''ATTRIBUTE''' is is a way to move from one object to the other

“Apply the power of the almighty dot” - objectname.attributename – and magic! 

Note: to know the attributes of an object: dir() 

This means the object has a method  called __dir__() 

dir() calls this method and prints the list of attributes

>>> sentence = "This is so exciting!" 

>>> dir(sentence) 

>>> suffix = "ing!" 

>>> print(sentence.endswith(suffix)) 

>>> len(sentence)

>>> print(sentence.endswith(suffix,20))

>>> print(sentence.endswith(suffix,16))

>>> print(sentence.endswith(suffix,16,20))


** Exercise: think of formula that gives TRUE for suffix 'is' 

Note: a long string can be annotated using 3 """ a lot of words """

If you have a very long string, you better use:

very_long_string = ( 

    "For a long time I used to go to bed early." 
  
    "There was no one in the house. Etc etc …."

   )