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-2

I need a Python method to have access to self for instance variables and also be able to take any number of arguments. I basically want a method foo that can be called via

foo(a, b, c)

or

foo()

In the class, I think the constructor would be

def foo(self, *args):

Is this correct? Also, fyi, I am new to Python (if you can't tell).

python args

share|improve this question

asked Mar 8 at 4:42

Intrastellar ExplorerIntrastellar Explorer

717

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Possible duplicate of What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
  
  – alec935
  Mar 8 at 4:57
  

  
  
  
  

add a comment | 

-2

I need a Python method to have access to self for instance variables and also be able to take any number of arguments. I basically want a method foo that can be called via

foo(a, b, c)

or

foo()

In the class, I think the constructor would be

def foo(self, *args):

Is this correct? Also, fyi, I am new to Python (if you can't tell).

python args

share|improve this question

asked Mar 8 at 4:42

Intrastellar ExplorerIntrastellar Explorer

717

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Possible duplicate of What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
  
  – alec935
  Mar 8 at 4:57
  

  
  
  
  

add a comment | 

I need a Python method to have access to self for instance variables and also be able to take any number of arguments. I basically want a method foo that can be called via

foo(a, b, c)

or

foo()

In the class, I think the constructor would be

def foo(self, *args):

Is this correct? Also, fyi, I am new to Python (if you can't tell).

python args

share|improve this question

asked Mar 8 at 4:42

Intrastellar ExplorerIntrastellar Explorer

717

foo(a, b, c)

foo()

def foo(self, *args):

share|improve this question

asked Mar 8 at 4:42

Intrastellar ExplorerIntrastellar Explorer

717

share|improve this question

asked Mar 8 at 4:42

Intrastellar ExplorerIntrastellar Explorer

717

asked Mar 8 at 4:42

Intrastellar ExplorerIntrastellar Explorer

717

asked Mar 8 at 4:42

Intrastellar ExplorerIntrastellar Explorer

717

3 Answers
3

active

oldest

votes

1

You just have to add it after the self parameter:

class YourClass:
 def foo(self, *args):
 print(args)
 def bar(self, *args, **kwargs):
 print(args)
 print(kwargs)
 def baz(self, **kwargs):
 print(kwargs)

I have also added a method in which you also add **kwargs, and the case in which you add both *args and **kwargs.

Examples

>>> o = YourClass()
>>> o.foo()
()
>>> o.foo(1)
(1,)
>>> o.foo(1, 2)
(1, 2)

share|improve this answer

edited Mar 8 at 4:52

answered Mar 8 at 4:46

lmiguelvargasflmiguelvargasf

12.9k1388112

add a comment | 

1

def foo(self, *args):

Yes, that is correct.

share|improve this answer

answered Mar 8 at 4:43

community wiki

John Kugelman

add a comment | 

1

You declared the method correctly. You can also use double asterisks to accept keyword arguments.
Reference: Expressions

A double asterisk ** denotes dictionary unpacking. Its operand must be a mapping. Each mapping item is added to the new dictionary. Later values replace values already set by earlier key/datum pairs and earlier dictionary unpackings.

....

An asterisk * denotes iterable unpacking. Its operand must be an iterable. The iterable is expanded into a sequence of items, which are included in the new tuple, list, or set, at the site of the unpacking.

Args will be a tuple. To access the values you will have to iterate or use positional arguments, ie: args[0]

share|improve this answer

answered Mar 8 at 4:57

ap288ap288

365

add a comment | 

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1

You just have to add it after the self parameter:

class YourClass:
 def foo(self, *args):
 print(args)
 def bar(self, *args, **kwargs):
 print(args)
 print(kwargs)
 def baz(self, **kwargs):
 print(kwargs)

I have also added a method in which you also add **kwargs, and the case in which you add both *args and **kwargs.

Examples

>>> o = YourClass()
>>> o.foo()
()
>>> o.foo(1)
(1,)
>>> o.foo(1, 2)
(1, 2)

share|improve this answer

edited Mar 8 at 4:52

answered Mar 8 at 4:46

lmiguelvargasflmiguelvargasf

12.9k1388112

add a comment | 

1

You just have to add it after the self parameter:

class YourClass:
 def foo(self, *args):
 print(args)
 def bar(self, *args, **kwargs):
 print(args)
 print(kwargs)
 def baz(self, **kwargs):
 print(kwargs)

I have also added a method in which you also add **kwargs, and the case in which you add both *args and **kwargs.

Examples

>>> o = YourClass()
>>> o.foo()
()
>>> o.foo(1)
(1,)
>>> o.foo(1, 2)
(1, 2)

share|improve this answer

edited Mar 8 at 4:52

answered Mar 8 at 4:46

lmiguelvargasflmiguelvargasf

12.9k1388112

add a comment | 

You just have to add it after the self parameter:

class YourClass:
 def foo(self, *args):
 print(args)
 def bar(self, *args, **kwargs):
 print(args)
 print(kwargs)
 def baz(self, **kwargs):
 print(kwargs)

I have also added a method in which you also add **kwargs, and the case in which you add both *args and **kwargs.

Examples

>>> o = YourClass()
>>> o.foo()
()
>>> o.foo(1)
(1,)
>>> o.foo(1, 2)
(1, 2)

share|improve this answer

edited Mar 8 at 4:52

answered Mar 8 at 4:46

lmiguelvargasflmiguelvargasf

12.9k1388112

class YourClass:
 def foo(self, *args):
 print(args)
 def bar(self, *args, **kwargs):
 print(args)
 print(kwargs)
 def baz(self, **kwargs):
 print(kwargs)

>>> o = YourClass()
>>> o.foo()
()
>>> o.foo(1)
(1,)
>>> o.foo(1, 2)
(1, 2)

share|improve this answer

edited Mar 8 at 4:52

answered Mar 8 at 4:46

lmiguelvargasflmiguelvargasf

12.9k1388112

answered Mar 8 at 4:46

lmiguelvargasflmiguelvargasf

12.9k1388112

answered Mar 8 at 4:46

lmiguelvargasflmiguelvargasf

12.9k1388112

def foo(self, *args):

def foo(self, *args):

def foo(self, *args):

def foo(self, *args):

1

You declared the method correctly. You can also use double asterisks to accept keyword arguments.
Reference: Expressions

A double asterisk ** denotes dictionary unpacking. Its operand must be a mapping. Each mapping item is added to the new dictionary. Later values replace values already set by earlier key/datum pairs and earlier dictionary unpackings.

....

An asterisk * denotes iterable unpacking. Its operand must be an iterable. The iterable is expanded into a sequence of items, which are included in the new tuple, list, or set, at the site of the unpacking.

Args will be a tuple. To access the values you will have to iterate or use positional arguments, ie: args[0]

share|improve this answer

answered Mar 8 at 4:57

ap288ap288

365

add a comment | 

1

You declared the method correctly. You can also use double asterisks to accept keyword arguments.
Reference: Expressions

A double asterisk ** denotes dictionary unpacking. Its operand must be a mapping. Each mapping item is added to the new dictionary. Later values replace values already set by earlier key/datum pairs and earlier dictionary unpackings.

....

An asterisk * denotes iterable unpacking. Its operand must be an iterable. The iterable is expanded into a sequence of items, which are included in the new tuple, list, or set, at the site of the unpacking.

Args will be a tuple. To access the values you will have to iterate or use positional arguments, ie: args[0]

share|improve this answer

answered Mar 8 at 4:57

ap288ap288

365

add a comment | 

You declared the method correctly. You can also use double asterisks to accept keyword arguments.
Reference: Expressions

A double asterisk ** denotes dictionary unpacking. Its operand must be a mapping. Each mapping item is added to the new dictionary. Later values replace values already set by earlier key/datum pairs and earlier dictionary unpackings.

....

An asterisk * denotes iterable unpacking. Its operand must be an iterable. The iterable is expanded into a sequence of items, which are included in the new tuple, list, or set, at the site of the unpacking.

Args will be a tuple. To access the values you will have to iterate or use positional arguments, ie: args[0]

share|improve this answer

answered Mar 8 at 4:57

ap288ap288

365

share|improve this answer

answered Mar 8 at 4:57

ap288ap288

365

answered Mar 8 at 4:57

ap288ap288

365

answered Mar 8 at 4:57

ap288ap288

365