Keyword argument enable you to specify an argument for a particular argument by associating the argument with the argument's name rather than with the argument's position in the argument list.
Keyword arguments are a synonym for named-parameters
Questions tagged [keyword-argument]
1010 questions
1542
votes
11 answers
Use of *args and **kwargs
So I have difficulty with the concept of *args and **kwargs.
So far I have learned that:
*args = list of arguments - as positional arguments
**kwargs = dictionary - whose keys become separate keyword arguments and the values become values of these…
MacPython
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846
votes
13 answers
What is the purpose and use of **kwargs?
What are the uses for **kwargs in Python?
I know you can do an objects.filter on a table and pass in a **kwargs argument.
Can I also do this for specifying time deltas i.e. timedelta(hours = time1)?
How exactly does it work? Is it classified as…
Federer
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595
votes
14 answers
Proper way to use **kwargs in Python
What is the proper way to use **kwargs in Python when it comes to default values?
kwargs returns a dictionary, but what is the best way to set default values, or is there one? Should I just access it as a dictionary? Use get function?
class…
Kekoa
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458
votes
3 answers
Converting Python dict to kwargs?
I want to build a query for sunburnt (solr interface) using class inheritance and therefore adding key-value pairs together. The sunburnt interface takes keyword arguments. How can I transform a dict ({'type':'Event'}) into keyword arguments…
teaforthecat
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166
votes
6 answers
How To Check If A Key in **kwargs Exists?
Python 3.2.3. There were some ideas listed here, which work on regular var's, but it seems **kwargs play by different rules... so why doesn't this work and how can I check to see if a key in **kwargs exists?
if kwargs['errormessage']:
print("It…
Zamphatta
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121
votes
4 answers
Passing a list of kwargs?
Can I pass a list of kwargs to a method for brevity? This is what i'm attempting to do:
def method(**kwargs):
#do something
keywords = (keyword1 = 'foo', keyword2 = 'bar')
method(keywords)
jwanga
- 4,166
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84
votes
8 answers
Why use **kwargs in python? What are some real world advantages over using named arguments?
I come from a background in static languages. Can someone explain (ideally through example) the real world advantages of using **kwargs over named arguments?
To me it only seems to make the function call more ambiguous. Thanks.
user178884
78
votes
4 answers
Calling a Python function with *args,**kwargs and optional / default arguments
In Python I can define a function as follows:
def func(kw1=None,kw2=None,**kwargs):
...
In this case, I can call func as:
func(kw1=3,kw2=4,who_knows_if_this_will_be_used=7,more_kwargs=Ellipsis)
I can also define a function as:
def…
mgilson
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78
votes
3 answers
Pass keyword arguments to target function in Python threading.Thread
I want to pass named arguments to the target function, while creating a Thread object.
Following is the code that I have written:
import threading
def f(x=None, y=None):
print x,y
t = threading.Thread(target=f, args=(x=1,y=2,))
t.start()
I…
xennygrimmato
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49
votes
4 answers
How to increase/reduce the fontsize of x and y tick labels
I seem to have a problem in figuring out how to increase or decrease the fontsize of both the x and y tick labels while using matplotlib.
I am aware that there is the set_xticklabels(labels, fontdict=None, minor=False, **kwargs) function, but I…
FaCoffee
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46
votes
4 answers
Python: Difference between kwargs.pop() and kwargs.get()
I have seen both ways but I do not understand what the difference is and what I should use as "best practice":
def custom_function(**kwargs):
foo = kwargs.pop('foo')
bar = kwargs.pop('bar')
...
def custom_function2(**kwargs):
foo =…
Aliquis
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46
votes
3 answers
python pass different **kwargs to multiple functions
From python doc and stackoverflow, I understand how to use the **kwargs in my def function. However, I have a case need two sets of **kwargs for two sub functions. Can someone show me how to separate the **kwargs properly?
Here is my goal: to plot…
user3287545
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45
votes
2 answers
How to make "keyword-only" fields with dataclasses?
Since 3.0 there is support to make an argument keyword only:
class S3Obj:
def __init__(self, bucket, key, *, storage_class='Standard'):
self.bucket = bucket
self.key = key
self.storage_class = storage_class
How to get…
wim
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42
votes
3 answers
How do I loop through **kwargs in Python?
In the code below, I want to read obj.subject and place it into var subject, also read obj.body and place it into body. First I want to read the kwargs variables and search for keywords within the string to replace, if none exists then move on.
How…
Mo J. Mughrabi
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40
votes
3 answers
Python: Passing parameters by name along with kwargs
In python we can do this:
def myFun1(one = '1', two = '2'):
...
Then we can call the function and pass the arguments by their name:
myFun1(two = 'two', one = 'one')
Also, we can do this:
def myFun2(**kwargs):
print kwargs.get('one',…
CodeArtist
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