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====== Python ======
===== Data Types and Data Structures =====
==== Variables and Objects ====
  * Dynamic Typing
  * ''variables'' are //Object references// 

<note important>
 ''function'' subroutine executed independandly\\
''method'' function bound to an instance of an object\\
''operator'' function bound or not to instance, do not use parenthesis and part
</note>

  * comparison opérator ''=='' , ''<'' ... => **Value** comparison
  * ''is'' operator => identity comparison (identify of an object can be retriece by ''object.**id()**'')
  * ''**//None//**'' special //null// object (singleton)

<note tip>
Python keywords\\
''and class elif finally if lambda print while as continue else for import not raise with
assert def except from in or return yield break del exec global is pass try''
</note>

==== Numbers and Strings ====
  * all basic types are //immutable//

=== Integers and Long Integers ===
  * ''bool'' : boolean with two values ''**False**'' and ''**True**''
    * In integer context ''False'' is evaluated to **0** , ''True'' is evaluted to **1**
  * ''int'' : //classical// machine related integer
    * operation with ''int'' exceeding the ''int'' range is converted into ''long'
  * ''long'' : integer which size is the machine memory
    * use suffix ''**L**'' to signify a ''long'' value 
  * numbers are by default written in **base 10**
  * Python assume that any value with prefix ''0x'' is written in hexadecimal, octol for value starting with **0**
  * classical operators ''+ - / % += -= /= %='' , '**' for power , '//' for truncated division
  * '//'' is 
=== Float and Decimal ==
  * float: double-precision floating-point numbers whose range depends on the C (or Java) compiler computed in base 2
  * Decimal
  * complex
=== String TYpes ===