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===Statements and control flow=== | ===Statements and control flow=== | ||
Python's | Python's Statement include (among others): | ||
* The | * The Assignment (computer science)|assignment statement, using a single equals sign <code>=</code>. | ||
* The <code> | * The <code>if-then-else|if</code> statement, which conditionally executes a block of code, along with <code>else</code> and <code>elif</code> (a contraction of else-if). | ||
* The <code> | |||
* The <code> | * The <code>Foreach#Python|for]]</code> statement, which iterates over an iterable object, capturing each element to a local variable for use by the attached block. | ||
* The <code> | |||
* The <code>While loop#Python|while]]</code> statement, which executes a block of code as long as its condition is true. | |||
* The <code>Exception handling syntax#Python|try]]</code> statement, which allows exceptions raised in its attached code block to be caught and handled by <code>except</code> clauses; it also ensures that clean-up code in a <code>finally</code> block will always be run regardless of how the block exits. | |||
* The <code>raise</code> statement, used to raise a specified exception or re-raise a caught exception. | * The <code>raise</code> statement, used to raise a specified exception or re-raise a caught exception. | ||
* The <code>class</code> statement, which executes a block of code and attaches its local namespace to a | |||
* The <code>class</code> statement, which executes a block of code and attaches its local namespace to a class (computer science)|class, for use in object-oriented programming. | |||
* The <code>def</code> statement, which defines a [[function (computing)|function]] or [[method (computing)|method]]. | * The <code>def</code> statement, which defines a [[function (computing)|function]] or [[method (computing)|method]]. | ||
* The <code> | |||
* The <code>dispose pattern#Language constructs|with</code> statement, which encloses a code block within a context manager (for example, acquiring a [[lock (computer science)|lock]] before the block of code is run and releasing the lock afterwards, or opening a [[Computer file|file]] and then closing it), allowing [[resource acquisition is initialization|resource-acquisition-is-initialization]] (RAII)-like behavior and replaces a common try/finally idiom.<ref>{{cite web|url=https://www.python.org/download/releases/2.5/highlights/|title=Highlights: Python 2.5|website=Python.org|access-date=20 March 2018|archive-date=4 August 2019|archive-url=https://web.archive.org/web/20190804120408/https://www.python.org/download/releases/2.5/highlights/|url-status=live}}</ref> | |||
* The [[break statement|<code>break</code>]] statement, exits from a loop. | * The [[break statement|<code>break</code>]] statement, exits from a loop. | ||
* The <code>continue</code> statement, skips this iteration and continues with the next item. | * The <code>continue</code> statement, skips this iteration and continues with the next item. | ||
* The <code>del</code> statement, removes a variable, which means the reference from the name to the value is deleted and trying to use that variable will cause an error. A deleted variable can be reassigned. | * The <code>del</code> statement, removes a variable, which means the reference from the name to the value is deleted and trying to use that variable will cause an error. A deleted variable can be reassigned. | ||
* The <code>pass</code> statement, which serves as a [[NOP (code)|NOP]]. It is syntactically needed to create an empty code block. | * The <code>pass</code> statement, which serves as a [[NOP (code)|NOP]]. It is syntactically needed to create an empty code block. | ||
* The <code> | * The <code>assertion (programming)|assert</code> statement, used during debugging to check for conditions that should apply. | ||
* The <code>yield</code> statement, which returns a value from a | * The <code>yield</code> statement, which returns a value from a generator (computer programming)#Python|generator function and <code>yield</code> is also an operator. This form is used to implement coroutines. | ||
* The <code>return</code> statement, used to return a value from a function. | * The <code>return</code> statement, used to return a value from a function. | ||
* The <code> | * The <code>include directive|import</code> statement, which is used to import modules whose functions or variables can be used in the current program. | ||
Revision as of 21:02, 25 August 2021
Python is an interpreted high-level general-purpose programming language. Its design philosophy emphasizes code readability with its use of significant indentation. Its language constructs as well as its object-oriented approach aim to help programmers write clear, logical code for small and large-scale projects.
The standard prrogramming language for data science and for us especially:
- machine learning, deep-learning using tensorflow or pytorch)
- audio analysis and manipulation using librosa
Also used to interface with 3d software such as poser 3d/blender and audacity and Libre Office.
Statements and control flow[edit]
Python's Statement include (among others):
- The Assignment (computer science)|assignment statement, using a single equals sign
=
. - The
if-then-else|if
statement, which conditionally executes a block of code, along withelse
andelif
(a contraction of else-if).
- The
Foreach#Python|for]]
statement, which iterates over an iterable object, capturing each element to a local variable for use by the attached block.
- The
While loop#Python|while]]
statement, which executes a block of code as long as its condition is true.
- The
Exception handling syntax#Python|try]]
statement, which allows exceptions raised in its attached code block to be caught and handled byexcept
clauses; it also ensures that clean-up code in afinally
block will always be run regardless of how the block exits.
- The
raise
statement, used to raise a specified exception or re-raise a caught exception.
- The
class
statement, which executes a block of code and attaches its local namespace to a class (computer science)|class, for use in object-oriented programming. - The
def
statement, which defines a function or method.
- The
dispose pattern#Language constructs|with
statement, which encloses a code block within a context manager (for example, acquiring a lock before the block of code is run and releasing the lock afterwards, or opening a file and then closing it), allowing resource-acquisition-is-initialization (RAII)-like behavior and replaces a common try/finally idiom.[1] - The
break
statement, exits from a loop. - The
continue
statement, skips this iteration and continues with the next item. - The
del
statement, removes a variable, which means the reference from the name to the value is deleted and trying to use that variable will cause an error. A deleted variable can be reassigned. - The
pass
statement, which serves as a NOP. It is syntactically needed to create an empty code block. - The
assertion (programming)|assert
statement, used during debugging to check for conditions that should apply. - The
yield
statement, which returns a value from a generator (computer programming)#Python|generator function andyield
is also an operator. This form is used to implement coroutines. - The
return
statement, used to return a value from a function. - The
include directive|import
statement, which is used to import modules whose functions or variables can be used in the current program.
- ↑ "Highlights: Python 2.5". Python.org. Archived from the original on 4 August 2019. Retrieved 20 March 2018.