ARGUMENT NUANCES SETUP In Python function invocations, copies of - - PowerPoint PPT Presentation

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ARGUMENT NUANCES SETUP In Python function invocations, copies of - - PowerPoint PPT Presentation

Jan 02, 2023 145 likes •504 views

ARGUMENT NUANCES SETUP In Python function invocations, copies of the values of arguments are used to initialize the parameters. This style of parameter passing is known as pass by value . Because copies are used, the values of the arguments

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ARGUMENT NUANCES

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  • In Python function invocations, copies of the values of arguments are used to

initialize the parameters. This style of parameter passing is known as pass by value.

  • Because copies are used, the values of the arguments cannot be modified within the

function being invoked.

SETUP

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x x = y y = rmbr

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x x = y y = rmbr main main city1 city2 ’London' 'Paris'

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : def f( x, y ) : rmbr = x x = y y = rmbr main main city1 city2 ’London' 'Paris' f() f() rmbr x y

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x rmbr = x x = y y = rmbr main main city1 city2 ’London' 'Paris' f() f() rmbr x y

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x rmbr = x x = y y = rmbr main main city1 city2 ’London' 'Paris' f() f() rmbr x y

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x x = y x = y y = rmbr main main city1 city2 ’London' 'Paris' f() f() rmbr x y

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f() f() rmbr x y Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x x = y x = y y = rmbr main main city1 city2 ’London' 'Paris'

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x x = y y = rmbr y = rmbr main main city1 city2 ’London' 'Paris' f() f() rmbr x y

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x x = y y = rmbr y = rmbr main main city1 city2 ’London' 'Paris' f() f() rmbr x y

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Program Program cautionary.py cautionary.py import tale city1 = 'London' city2 = 'Paris’ tale.f tale.f( city1, city2 ) ( city1, city2 ) print( city1, city2 )

PYTHON FILES

Module Module tale.py tale.py def f( x, y ) : rmbr = x x = y y = rmbr main main city1 city2 ’London' 'Paris' f() f() rmbr x y main main city1 city2

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Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def zero( x) : n = len( x ) for i in range( 0, n ) : x[ i ] = 0

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Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : n = len( x ) for i in range( 0, n ) : x[ i ] = 0 main main nbrs 3 1 4

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Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ i ] = 0 main main nbrs 3 1 4

  • ut()
  • ut()

x i n

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  • ut()
  • ut()

x i n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ i ] = 0 main main nbrs 3 1 4

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  • ut()
  • ut()

x i n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = n = len len( x ) ( x ) for i in range( 0, n ) : x[ i ] = 0 main main nbrs 3 1 4

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  • ut()
  • ut()

x i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = n = len len( x ) ( x ) for i in range( 0, n ) : x[ i ] = 0 main main nbrs 3 1 4

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  • ut()
  • ut()

x i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for for i in range( 0, n ) : in range( 0, n ) : x[ i ] = 0 main main nbrs 3 1 4

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  • ut()
  • ut()

x i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for for i in range( 0, n ) : in range( 0, n ) : x[ i ] = 0 main main nbrs 3 1 4

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  • ut()
  • ut()

x i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ x[ i ] = 0 ] = 0 main main nbrs 3 1 4

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  • ut()
  • ut()

x i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ x[ i ] = 0 ] = 0 main main nbrs 1 4

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  • ut()
  • ut()

x i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for for i in range( 0, n ) : in range( 0, n ) : x[ i ] = 0 main main nbrs 1 4

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  • ut()
  • ut()

x 1 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for for i in range( 0, n ) : in range( 0, n ) : x[ i ] = 0 main main nbrs 1 4

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  • ut()
  • ut()

x 1 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ x[ i ] = 0 ] = 0 main main nbrs 1 4

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  • ut()
  • ut()

x 1 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ x[ i ] = 0 ] = 0 main main nbrs 4

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  • ut()
  • ut()

x 1 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for for i in range( 0, n ) : in range( 0, n ) : x[ i ] = 0 main main nbrs 4

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  • ut()
  • ut()

x 2 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for for i in range( 0, n ) : in range( 0, n ) : x[ i ] = 0 main main nbrs 4

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  • ut()
  • ut()

x 2 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ x[ i ] = 0 ] = 0 main main nbrs 4

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  • ut()
  • ut()

x 2 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ x[ i ] = 0 ] = 0 main main nbrs

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  • ut()
  • ut()

x 2 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for for i in range( 0, n ) : in range( 0, n ) : x[ i ] = 0 main main nbrs

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  • ut()
  • ut()

x 2 i 3 n Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out zero.out( nbrs ) ( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ i ] = 0 main main nbrs main main nbrs

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Program Program wipe.py wipe.py import zero nbrs = [ 3, 1, 4 ] zero.out( nbrs ) print( nbrs ) print( nbrs )

PYTHON FILES

Module Module zero.py zero.py def out( x) : def out( x) : n = len( x ) for i in range( 0, n ) : x[ i ] = 0 main main nbrs main main nbrs