id stringlengths 16 145 | text stringlengths 1 179k | title stringclasses 1
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python_data_model/python_data_model_31_0.txt | ### 3.2.13. Internal types ¶
A few types used internally by the interpreter are exposed to the user. Their
definitions may change with future versions of the interpreter, but they are
mentioned here for completeness.
| |
python_data_model/using-setattr-in-python2_125_0.txt | 189
Why is using 'eval' a bad practice? | |
python_data_model/23210_63_0.txt | Something went wrong.
Quote reply | |
python_data_model/23210_2_0.txt | * Product
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python_data_model/python_data_model_74_0.txt | ### [ Table of Contents ](../contents.html)
* 3\. Data model
* 3.1. Objects, values and types
* 3.2. The standard type hierarchy
* 3.2.1. None
* 3.2.2. NotImplemented
* 3.2.3. Ellipsis
* 3.2.4. ` numbers.Number `
* 3.2.4.1. ` numbers.Integral `
* 3.2.4.2. ` nu... | |
python_data_model/23210_93_0.txt | Unordered list
Task list | |
python_data_model/Chapter1_The_Python_Data_Model_2_0.txt | ## String Representation
The ` __repr__ ` special method is called by the ` repr ` built-in to get the
string representation of the object for inspection. If we did not implement `
__repr__ ` , vector instances would be shown in the console like ` <Vector
object at 0x10e100070> ` .
The interactive console and debugg... | |
python_data_model/using-setattr-in-python2_138_0.txt | 0
python __setattr__ attribute issue | |
python_data_model/23210_26_0.txt | Cancel Create saved search
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python_data_model/python_data_model_48_0.txt | #### 3.3.2.3. Invoking Descriptors ¶
In general, a descriptor is an object attribute with âbinding behaviorâ,
one whose attribute access has been overridden by methods in the descriptor
protocol: ` __get__() ` , ` __set__() ` , and ` __delete__() ` . If any
of those methods are defined for an object, it ... | |
python_data_model/The_import_system_2_0.txt | ## 5.2. Packages ¶
Python has only one type of module object, and all modules are of this type,
regardless of whether the module is implemented in Python, C, or something
else. To help organize modules and provide a naming hierarchy, Python has a
concept of [ packages ](../glossary.html#term-package) .
You can t... | |
python_data_model/python_data_model_7_0.txt | #### 3.2.4.2. [ ` numbers.Real ` ](../library/numbers.html#numbers.Real
"numbers.Real") ( [ ` float ` ](../library/functions.html#float "float") )
¶
These represent machine-level double precision floating point numbers. You are
at the mercy of the underlying machine architecture (and C or Java
implementation) for... | |
python_data_model/23210_76_0.txt | Author
\- | |
python_data_model/python-setattr6_33_0.txt | Join the Finxter Academy and unlock access to premium courses 👑 to certify
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python_data_model/The_import_system_1_0.txt | ## 5.1. [ ` importlib ` ](../library/importlib.html#module-importlib
"importlib: The implementation of the import machinery.") ¶
The [ ` importlib ` ](../library/importlib.html#module-importlib "importlib:
The implementation of the import machinery.") module provides a rich API for
interacting with the import sys... | |
python_data_model/python_data_model_37_0.txt | ##### 3.2.13.2.2. Special writable attributes ¶
frame. f_trace ¶
| If not ` None ` , this is a function called for various events during code
execution (this is used by debuggers). Normally an event is triggered for each
new source line (see ` f_trace_lines ` ).
---|---
frame. f_trace_lines Â... | |
python_data_model/python_data_model_15_0.txt | ### 3.2.8. Callable types ¶
These are the types to which the function call operation (see section [ Calls
](expressions.html#calls) ) can be applied:
| |
python_data_model/using-setattr-in-python2_3_0.txt | * Stack Overflow
help chat | |
python_data_model/23210_53_0.txt | ####
mejrs Apr 20, 2022 | |
python_data_model/python_data_model_47_0.txt | #### 3.3.2.2. Implementing Descriptors ¶
The following methods only apply when an instance of the class containing the
method (a so-called _descriptor_ class) appears in an _owner_ class (the
descriptor must be in either the ownerâs class dictionary or in the class
dictionary for one of its parents). In the exam... | |
python_data_model/Simple_statements_2_3.txt | pt for the last [ ` __setitem__() `
](datamodel.html#object.__setitem__ "object.__setitem__") or [ ` __setattr__()
` ](datamodel.html#object.__setattr__ "object.__setattr__") call.
See also
[ **PEP 526** ](https://peps.python.org/pep-0526/) \- Syntax for Variable
Annotations
The proposal that added syntax for... | |
python_data_model/using-setattr-in-python2_147_0.txt | ##### Stack Overflow
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### | |
python_data_model/Execution_model_3_0.txt | ## 4.3. Exceptions ¶
Exceptions are a means of breaking out of the normal flow of control of a code
block in order to handle errors or other exceptional conditions. An exception
is _raised_ at the point where the error is detected; it may be _handled_ by
the surrounding code block or by any code block that directl... | |
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python_data_model/using-setattr-in-python2_36_0.txt | @monkut: triple-quoted string, not docstring; "docstring" just refers to a
string which is the first statement in a module, class or function definition
(or the ` __doc__ ` attribute of an object).
– Chris Morgan | |
python_data_model/using-setattr-in-python2_81_0.txt | 10
To add to the other answers, a common use case I have found for ` setattr() `
is when using configs. It is common to parse configs from a file (.ini file or
whatever) into a dictionary. So you end up with something like: | |
python_data_model/using-setattr-in-python2_61_0.txt | – Chris Morgan
May 29, 2016 at 22:22 | |
python_data_model/python_data_model_69_0.txt | ## 3.4. Coroutines ¶
| |
python_data_model/using-setattr-in-python2_16_0.txt | Q&A for work
Connect and share knowledge within a single location that is structured and
easy to search. | |
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python_data_model/using-setattr-in-python2_22_0.txt | My problem arose trying to use one class method/function to return data that
is then put in another method/function. Perhaps a simpler approach would be
much better in this case, but I'm trying to understand how classes work/are
used. This problem seems to hinge on ` setattr() ` , and this is my attempt to
make a fairl... | |
python_data_model/using-setattr-in-python2_57_0.txt | – e.thompsy
May 18, 2015 at 20:16 | |
python_data_model/python_data_model_78_0.txt | ### Navigation
* [ index ](../genindex.html "General Index")
* [ modules ](../py-modindex.html "Python Module Index") |
* [ next ](executionmodel.html "4. Execution model") |
* [ previous ](lexical_analysis.html "2. Lexical analysis") |
* 
* [ Python ](https://www.pytho... | |
python_data_model/Expressions_0_1.txt | n a module is first imported, Python searches for the module and if found,
it creates a module object [ 1 ] , initializing it. If the named module
cannot be found, a [ ` ModuleNotFoundError `
](../library/exceptions.html#ModuleNotFoundError "ModuleNotFoundError") is
raised. Python implements various strategies to ... | |
python_data_model/using-setattr-in-python2_118_0.txt | * python
* setattr
or ask your own question . | |
python_data_model/using-setattr-in-python2_56_0.txt | * 7
@halfnibble: An example: ` for key in data: value = request.DATA.get(key)
setattr(obj, key, value) ` <\-- iterates through all provided POST data and
assigns to obj using key as the field. | |
python_data_model/python_data_model_0_0.txt | ## 3.1. Objects, values and types ¶
_Objects_ are Pythonâs abstraction for data. All data in a Python program is
represented by objects or by relations between objects. (In a sense, and in
conformance to Von Neumannâs model of a âstored program computerâ, code
is also represented by objects.)
Every object... | |
python_data_model/using-setattr-in-python2_134_0.txt | 15
Python: inconsistence in the way you define the function __setattr__? | |
python_data_model/using-setattr-in-python2_140_0.txt | 1
__setattr__ function in Python | |
python_data_model/23210_83_0.txt | You can get it from ` object ` itself:
let setattr = PyModule::import(py, "builtins")?
.getattr("object")?
.getattr("__setattr__")?;
---
Beta Was this translation helpful? Give feedback. | |
python_data_model/The_import_system_0_0.txt | [  ](https://www.python.org/)
Theme Auto Light Dark
### [ Table of Contents ](../contents.html)
* 5\. The import system
* 5.1. ` importlib `
* 5.2. Packages
* 5.2.1. Regular packages
* 5.2.2. Namespace packages
* 5.3. Searching
* 5.3.1. The m... | |
python_data_model/23210_78_0.txt | Comment options
* | |
python_data_model/python-setattr6_11_0.txt | If you like one-liners, you’ll LOVE the book. It’ll teach you everything there
is to know about a single line of Python code. But it’s also an
introduction to computer science , data science, machine learning, and
algorithms. The universe in a single line of Python!
The book was released in 2020 with the world-cla... | |
python_data_model/python_data_model_36_0.txt | ##### 3.2.13.2.1. Special read-only attributes ¶
frame. f_back ¶
| Points to the previous stack frame (towards the caller), or ` None ` if
this is the bottom stack frame
---|---
frame. f_code ¶
| The code object being executed in this frame. Accessing this attribute
raises an [ auditi... | |
python_data_model/python-setattr6_19_0.txt | ## Summary
Python’s built-in ` setattr(object, string, value) ` function takes three
arguments: an object , a string , and an arbitrary value . | |
python_data_model/Simple_statements_2_1.txt | ributeError "AttributeError") ).
Note: If the object is a class instance and the attribute reference occurs on
both sides of the assignment operator, the right-hand side expression, ` a.x
` can access either an instance attribute or (if no instance attribute exists)
a class attribute. The left-hand side target ` a.x ... | |
python_data_model/using-setattr-in-python2_121_0.txt | * The [connect] tag is being burninated
#### Linked | |
python_data_model/using-setattr-in-python2_42_0.txt | @Haleemur Ali Generally speaking comments are intended to provide
clarification of code actions, and are not intended as output of the program.
A commented line is not analyzed by the interpreter, so it does not affect run
time behavior. Creating strings consumes memory and processing time.
– monkut | |
python_data_model/using-setattr-in-python2_103_0.txt | answered Sep 3, 2021 at 16:03
Brakke Baviaan Brakke Baviaan | |
python_data_model/python-setattr6_14_0.txt | The idea is to be able to create a class with dynamic attributes chosen at
runtime by the user or the program. This way, you can create container classes
that hold arbitrary attributes.
class Person:
def __init__(self, attributes):
for key, value in attributes.items():
... | |
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python_data_model/Chapter1_The_Python_Data_Model_0_3.txt | ` , and so on,
the interpreter takes a shortcut: the CPython implementation of ` len() `
actually returns the value of the ` ob_size ` field in the ` PyVarObject ` C
struct that represents any variable-sized built-in object in memory. This is
much faster than calling a method.
More often than not, the special method ... | |
python_data_model/python-setattr6_0_0.txt | Skip to content
Menu | |
python_data_model/The_import_system_4_4.txt | le reprs ¶
By default, all modules have a usable repr, however depending on the
attributes set above, and in the moduleâs spec, you can more explicitly
control the repr of module objects.
If the module has a spec ( ` __spec__ ` ), the import machinery will try to
generate a repr from it. If that fails or there i... | |
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python_data_model/python_data_model_50_0.txt | ### 3.3.3. Customizing class creation ¶
Whenever a class inherits from another class, ` __init_subclass__() ` is
called on the parent class. This way, it is possible to write classes which
change the behavior of subclasses. This is closely related to class
decorators, but where class decorators only affect the s... | |
python_data_model/Simple_statements_0_0.txt | [  ](https://www.python.org/)
Theme Auto Light Dark
### [ Table of Contents ](../contents.html)
* 7\. Simple statements
* 7.1. Expression statements
* 7.2. Assignment statements
* 7.2.1. Augmented assignment statements
* 7.2.2. Annotated assignment state... | |
python_data_model/python-setattr6_23_0.txt | ## Where to Go From Here?
Enough theory. Let’s get some practice! | |
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python_data_model/using-setattr-in-python2_65_0.txt |
value_returned = self.get_thing()
Share | |
python_data_model/using-setattr-in-python2_127_0.txt | 1
Assigning attributes to class methods | |
python_data_model/using-setattr-in-python2_37_0.txt | Mar 7, 2012 at 5:46
* 2 | |
python_data_model/python_data_model_19_0.txt | #### 3.2.8.2. Instance methods ¶
An instance method object combines a class, a class instance and any callable
object (normally a user-defined function).
Special read-only attributes:
method. __self__ ¶
| Refers to the class instance object to which the method is bound
---|---
method. __func__... | |
python_data_model/Expressions_4_1.txt | rtError ` ](../library/exceptions.html#ImportError "ImportError") , although any other exception raised during [ ` exec_module() ` ](../library/importlib.html#importlib.abc.Loader.exec_module "importlib.abc.Loader.exec_module") will be propagated.
In many cases, the finder and loader can be the same object; in such... | |
python_data_model/using-setattr-in-python2_58_0.txt | * 3
@Chris Morgan, how do some objects disallow ` setattr ` ? E.g. ` x =
numpy.ones(3); setattr( x, "name", "xname" ) ` \--> AttributeError ? (I'll ask
a new question if you like) | |
python_data_model/23210_64_0.txt | ####
samuelcolvin Apr 20, 2022 | |
python_data_model/Chapter1_The_Python_Data_Model_7_0.txt | ## International
* [ Australia & New Zealand ](https://www.oreilly.com/anz/)
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python_data_model/python-setattr6_24_0.txt | Coders get paid six figures and more because they can solve problems more
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To become more successful in coding, solve more real problems for real people.
That’s how you polish the skills you really need in practice. After all,
what’s the use of learning theory that... | |
python_data_model/23210_41_0.txt | All reactions
## Replies: 2 comments · 6 replies | |
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python_data_model/python_data_model_53_0.txt | #### 3.3.3.3. Determining the appropriate metaclass ¶
The appropriate metaclass for a class definition is determined as follows:
* if no bases and no explicit metaclass are given, then [ ` type() ` ](../library/functions.html#type "type") is used;
* if an explicit metaclass is given and it is _not_ an inst... | |
python_data_model/python_data_model_6_0.txt | #### 3.2.4.1. [ ` numbers.Integral `
](../library/numbers.html#numbers.Integral "numbers.Integral") ¶
These represent elements from the mathematical set of integers (positive and
negative).
Note
The rules for integer representation are intended to give the most meaningful
interpretation of shift and mask operati... | |
python_data_model/using-setattr-in-python2_78_0.txt | Bill Tür stands with Ukraine
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#### | |
python_data_model/20_3_0.txt |
class ClassA:
pass
obj = ClassA()
obj.attr1 = 1
obj.attr2 = 'hello'
print(dir(obj)) # Get list of object's attributes.
# You may want to filter the "dunder" (double-underscore) attributes.
setattr(obj, 'attr1', 7) # Set attribute's v... | |
python_data_model/using-setattr-in-python2_31_0.txt | bounce
asked Mar 5, 2012 at 3:11 | |
python_data_model/23210_98_0.txt | 👍 1 reacted with thumbs up emoji 👎 1 reacted with thumbs down emoji 😄 1
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python_data_model/using-setattr-in-python2_34_0.txt | ` setattr ` is for situations where you can't do it directly. As a beginner,
these should be nonexistent. ` setattr(self, 'name', 'get_thing') ` means
exactly the same as ` self.name = 'get_thing' ` .
– Karl Knechtel | |
python_data_model/using-setattr-in-python2_89_0.txt | 6
Suppose you want to give attributes to an instance which was previously not
written in code. The ` setattr() ` does just that. It takes the instance of
the class ` self ` and key and value to set. | |
python_data_model/python-setattr6_16_0.txt | There are two equivalent ways to set or update the value of a new attribute
for an object:
* Use the ` setattr(object, "attribute", value) ` function.
* Use the assignment operation ` object.attribute = value ` . | |
python_data_model/23210_71_0.txt | \-
I'm weakly against adding an api for this. This use case seems pretty niche.
And I fear it would be easily confused with ` setattr ` 😐 .
---
Beta Was this translation helpful? Give feedback. | |
python_data_model/using-setattr-in-python2_84_0.txt |
for name, val in configs.items():
setattr(MyClass, name, val)
As long as your dictionary keys have the proper names, this works very well
and is nice and tidy. | |
python_data_model/using-setattr-in-python2_11_0.txt | 10. Communities for your favorite technologies. Explore all Collectives
2. Teams | |
python_data_model/The_import_system_5_3.txt | the import protocol,
many path entry finders also support the same, traditional ` find_module() `
method that meta path finders support. However path entry finder `
find_module() ` methods are never called with a ` path ` argument (they are
expected to record the appropriate path information from the initial call to... | |
python_data_model/python_data_model_76_0.txt | #### Next topic
[ 4\. Execution model ](executionmodel.html "next chapter")
| |
python_data_model/using-setattr-in-python2_20_0.txt | Modified 1 year, 11 months ago
Viewed 219k times | |
python_data_model/20_2_0.txt | vbrozik (Václav Brožík) July 7, 2022, 8:24am 2
Hello, I think you are looking for these three builtin functions: | |
python_data_model/python_data_model_35_0.txt | #### 3.2.13.2. Frame objects ¶
Frame objects represent execution frames. They may occur in traceback objects
, and are also passed to registered trace functions.
| |
python_data_model/python-setattr6_18_0.txt | ## Related Functions
* The ` getattr() ` function returns the value of an attribute.
* The ` setattr() ` function changes the value of an attribute.
* The ` hasattr() ` function checks if an attribute exists.
* The ` delattr() ` function deletes an existing attribute. |
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