René's URL Explorer Experiment


Title: 2.1. Weakref — Python - from None to AI

direct link

Domain: www.python3.info

authorMatt Harasymczuk
published2025-01-01
updated2025-11-05
readtime20 minutes
tagspython, oop

Links:

Python - from None to AI https://www.python3.info/index.html
Licensehttps://www.python3.info/LICENSE.html
Installhttps://www.python3.info/install.html
Python Versionshttps://www.python3.info/about/versions.html
Python Historyhttps://www.python3.info/about/history.html
Linkshttps://www.python3.info/about/links.html
Referenceshttps://www.python3.info/about/references.html
1. Abouthttps://www.python3.info/basics/index.html
2. Introductionhttps://www.python3.info/basics/index.html#introduction
3. Syntaxhttps://www.python3.info/basics/index.html#syntax
4. Numerichttps://www.python3.info/basics/index.html#numeric
5. Logichttps://www.python3.info/basics/index.html#logic
6. Stringshttps://www.python3.info/basics/index.html#strings
7. Iterableshttps://www.python3.info/basics/index.html#iterables
8. Mappingshttps://www.python3.info/basics/index.html#mappings
9. Nestedhttps://www.python3.info/basics/index.html#nested
10. Unpackhttps://www.python3.info/basics/index.html#unpack
11. Conditionalhttps://www.python3.info/basics/index.html#conditional
12. Whilehttps://www.python3.info/basics/index.html#while
13. Forhttps://www.python3.info/basics/index.html#for
14. Comprehensionshttps://www.python3.info/basics/index.html#comprehensions
15. Fileshttps://www.python3.info/basics/index.html#files
16. Functionshttps://www.python3.info/basics/index.html#functions
17. Exceptionshttps://www.python3.info/basics/index.html#exceptions
18. Idiomhttps://www.python3.info/basics/index.html#idiom
19. OOPhttps://www.python3.info/basics/index.html#oop
20. Moduleshttps://www.python3.info/basics/index.html#modules
21. Recaphttps://www.python3.info/basics/index.html#recap
1. Abouthttps://www.python3.info/intermediate/index.html
2. Stringhttps://www.python3.info/intermediate/index.html#string
3. Syntaxhttps://www.python3.info/intermediate/index.html#syntax
4. Starhttps://www.python3.info/intermediate/index.html#star
5. Enumhttps://www.python3.info/intermediate/index.html#enum
6. Matchhttps://www.python3.info/intermediate/index.html#match
7. Regexhttps://www.python3.info/intermediate/index.html#regex
8. Datetimehttps://www.python3.info/intermediate/index.html#datetime
9. Generatorshttps://www.python3.info/intermediate/index.html#generators
10. Iteratorhttps://www.python3.info/intermediate/index.html#iterator
11. Serializationhttps://www.python3.info/intermediate/index.html#serialization
12. Picklehttps://www.python3.info/intermediate/index.html#pickle
13. TOMLhttps://www.python3.info/intermediate/index.html#toml
14. CSVhttps://www.python3.info/intermediate/index.html#csv
15. JSONhttps://www.python3.info/intermediate/index.html#json
16. Pathlibhttps://www.python3.info/intermediate/index.html#pathlib
17. Logginghttps://www.python3.info/intermediate/index.html#logging
18. Moduleshttps://www.python3.info/intermediate/index.html#modules
19. Typinghttps://www.python3.info/intermediate/index.html#typing
20. OOP Dataclasshttps://www.python3.info/intermediate/index.html#oop-dataclass
1. Abouthttps://www.python3.info/advanced/index.html
2. Syntaxhttps://www.python3.info/advanced/index.html#syntax
3. OOP Paradigmhttps://www.python3.info/advanced/index.html#oop-paradigm
4. OOP Inheritancehttps://www.python3.info/advanced/index.html#oop-inheritance
5. OOP Polymorphismhttps://www.python3.info/advanced/index.html#oop-polymorphism
6. OOP Encapsulationhttps://www.python3.info/advanced/index.html#oop-encapsulation
7. OOP Metaprogramminghttps://www.python3.info/advanced/index.html#oop-metaprogramming
8. OOP Operatorhttps://www.python3.info/advanced/index.html#oop-operator
9. FP Paradigmhttps://www.python3.info/advanced/index.html#fp-paradigm
10. FP Applyhttps://www.python3.info/advanced/index.html#fp-apply
11. Decoratorshttps://www.python3.info/advanced/index.html#decorators
12. Async Paradigmhttps://www.python3.info/advanced/index.html#async-paradigm
13. Async AsyncIOhttps://www.python3.info/advanced/index.html#async-asyncio
1. Abouthttps://www.python3.info/performance/index.html
2. Introductionhttps://www.python3.info/performance/index.html#introduction
3. Transpilationhttps://www.python3.info/performance/index.html#transpilation
4. Optimizationhttps://www.python3.info/performance/index.html#optimization
5. Profilinghttps://www.python3.info/performance/index.html#profiling
6. Case Studyhttps://www.python3.info/performance/index.html#case-study
7. Threadinghttps://www.python3.info/performance/index.html#threading
8. Multiprocessinghttps://www.python3.info/performance/index.html#multiprocessing
9. Extensionshttps://www.python3.info/performance/index.html#extensions
1. Abouthttps://www.python3.info/testing/index.html
2. Introductionhttps://www.python3.info/testing/index.html#introduction
3. Randomhttps://www.python3.info/testing/index.html#random
4. Syntaxhttps://www.python3.info/testing/index.html#syntax
5. Doctesthttps://www.python3.info/testing/index.html#doctest
6. Unittesthttps://www.python3.info/testing/index.html#unittest
7. Recaphttps://www.python3.info/testing/index.html#recap
1. Abouthttps://www.python3.info/ci-cd/index.html
2. DevToolshttps://www.python3.info/ci-cd/index.html#devtools
3. Distributehttps://www.python3.info/ci-cd/index.html#distribute
4. Linthttps://www.python3.info/ci-cd/index.html#lint
5. Qualityhttps://www.python3.info/ci-cd/index.html#quality
6. Securityhttps://www.python3.info/ci-cd/index.html#security
1. Abouthttps://www.python3.info/devops/index.html
2. Qualityhttps://www.python3.info/devops/index.html#quality
3. Testshttps://www.python3.info/devops/index.html#tests
4. Debugginghttps://www.python3.info/devops/index.html#debugging
1. Abouthttps://www.python3.info/database/index.html
2. Theoryhttps://www.python3.info/database/index.html#theory
3. ORMhttps://www.python3.info/database/index.html#orm
4. Normalizationhttps://www.python3.info/database/index.html#normalization
5. NoSQLhttps://www.python3.info/database/index.html#nosql
6. SQLhttps://www.python3.info/database/index.html#sql
7. SQLite3https://www.python3.info/database/index.html#sqlite3
8. SQLAlchemyhttps://www.python3.info/database/index.html#sqlalchemy
9. Case Studyhttps://www.python3.info/database/index.html#case-study
1. Abouthttps://www.python3.info/design-patterns/index.html
2. Introductionhttps://www.python3.info/design-patterns/index.html#introduction
3. UMLhttps://www.python3.info/design-patterns/index.html#uml
4. Creationalhttps://www.python3.info/design-patterns/index.html#creational
5. Behavioralhttps://www.python3.info/design-patterns/index.html#behavioral
6. Structuralhttps://www.python3.info/design-patterns/index.html#structural
7. Functionalhttps://www.python3.info/design-patterns/index.html#functional
1. Abouthttps://www.python3.info/numpy/index.html
2. Introductionhttps://www.python3.info/numpy/index.html#introduction
3. Arrayhttps://www.python3.info/numpy/index.html#array
4. Attributeshttps://www.python3.info/numpy/index.html#attributes
5. Randomhttps://www.python3.info/numpy/index.html#random
6. Indexinghttps://www.python3.info/numpy/index.html#indexing
7. Operationshttps://www.python3.info/numpy/index.html#operations
8. Methodshttps://www.python3.info/numpy/index.html#methods
9. Statisticshttps://www.python3.info/numpy/index.html#statistics
10. Mathhttps://www.python3.info/numpy/index.html#math
11. Polynomialhttps://www.python3.info/numpy/index.html#polynomial
1. Abouthttps://www.python3.info/pandas/index.html
2. Introductionhttps://www.python3.info/pandas/index.html#introduction
3. Readhttps://www.python3.info/pandas/index.html#read
4. Tohttps://www.python3.info/pandas/index.html#to
5. Serieshttps://www.python3.info/pandas/index.html#series
6. DataFramehttps://www.python3.info/pandas/index.html#dataframe
7. Datehttps://www.python3.info/pandas/index.html#date
8. Case Studyhttps://www.python3.info/pandas/index.html#case-study
1. Abouthttps://www.python3.info/matplotlib/index.html
2. Introductionhttps://www.python3.info/matplotlib/index.html#introduction
3. Figurehttps://www.python3.info/matplotlib/index.html#figure
4. Stylehttps://www.python3.info/matplotlib/index.html#style
5. Charthttps://www.python3.info/matplotlib/index.html#chart
6. Case Studyhttps://www.python3.info/matplotlib/index.html#case-study
1. Moduleshttps://www.python3.info/stdlib/index.html
2. Collectionshttps://www.python3.info/stdlib/index.html#collections
3. Mathhttps://www.python3.info/stdlib/index.html#math
4. Localehttps://www.python3.info/stdlib/index.html#locale
5. XMLhttps://www.python3.info/stdlib/index.html#xml
6. Operating Systemhttps://www.python3.info/stdlib/index.html#operating-system
7. Stringhttps://www.python3.info/stdlib/index.html#string
8. Builtinhttps://www.python3.info/stdlib/index.html#builtin
9. Typehttps://www.python3.info/stdlib/index.html#type
10. Loophttps://www.python3.info/stdlib/index.html#loop
11. TkInterhttps://www.python3.info/stdlib/index.html#tkinter
1. Abouthttps://www.python3.info/network/index.html
2. Protocolhttps://www.python3.info/network/index.html#protocol
3. Webhttps://www.python3.info/network/index.html#web
4. Transporthttps://www.python3.info/network/index.html#transport
5. Case Studyhttps://www.python3.info/network/index.html#case-study
1. Abouthttps://www.python3.info/webapp/index.html
2. HTTPhttps://www.python3.info/webapp/index.html#http
3. RESThttps://www.python3.info/webapp/index.html#rest
4. Architecturehttps://www.python3.info/webapp/index.html#architecture
5. Authhttps://www.python3.info/webapp/index.html#auth
1. Abouthttps://www.python3.info/django/index.html
2. Introductionhttps://www.python3.info/django/index.html#introduction
3. Setuphttps://www.python3.info/django/index.html#setup
4. Settingshttps://www.python3.info/django/index.html#settings
5. Modelshttps://www.python3.info/django/index.html#models
6. Datahttps://www.python3.info/django/index.html#data
7. Adminhttps://www.python3.info/django/index.html#admin
8. ORMhttps://www.python3.info/django/index.html#orm
9. Viewshttps://www.python3.info/django/index.html#views
10. Templateshttps://www.python3.info/django/index.html#templates
11. Templatetagshttps://www.python3.info/django/index.html#templatetags
12. Formshttps://www.python3.info/django/index.html#forms
13. Managehttps://www.python3.info/django/index.html#manage
14. Middlewarehttps://www.python3.info/django/index.html#middleware
15. Localehttps://www.python3.info/django/index.html#locale
16. Utilshttps://www.python3.info/django/index.html#utils
17. Authhttps://www.python3.info/django/index.html#auth
18. APIhttps://www.python3.info/django/index.html#api
19. Ninjahttps://www.python3.info/django/index.html#ninja
20. Testshttps://www.python3.info/django/index.html#tests
21. Appshttps://www.python3.info/django/index.html#apps
22. Deployhttps://www.python3.info/django/index.html#deploy
1. Abouthttps://www.python3.info/fastapi/index.html
2. Introductionhttps://www.python3.info/fastapi/index.html#introduction
3. FastAPIhttps://www.python3.info/fastapi/index.html#fastapi
4. Pydantichttps://www.python3.info/fastapi/index.html#pydantic
5. Databasehttps://www.python3.info/fastapi/index.html#database
6. Authhttps://www.python3.info/fastapi/index.html#auth
7. DevOpshttps://www.python3.info/fastapi/index.html#devops
8. Case Studyhttps://www.python3.info/fastapi/index.html#case-study
1. Abouthttps://www.python3.info/data-science/index.html
2. Jupyterhttps://www.python3.info/data-science/index.html#jupyter
3. Pythonhttps://www.python3.info/data-science/index.html#python
4. Visualizationhttps://www.python3.info/data-science/index.html#visualization
5. Scipyhttps://www.python3.info/data-science/index.html#scipy
6. Geopandashttps://www.python3.info/data-science/index.html#geopandas
1. Abouthttps://www.python3.info/machine-learning/index.html
2. Introductionhttps://www.python3.info/machine-learning/index.html#introduction
3. Sklearnhttps://www.python3.info/machine-learning/index.html#sklearn
4. Model Qualityhttps://www.python3.info/machine-learning/index.html#model-quality
5. Decision Treeshttps://www.python3.info/machine-learning/index.html#decision-trees
6. Regressionshttps://www.python3.info/machine-learning/index.html#regressions
7. K-Nearest Neighborshttps://www.python3.info/machine-learning/index.html#k-nearest-neighbors
8. Bayeshttps://www.python3.info/machine-learning/index.html#bayes
9. Support Vector Machineshttps://www.python3.info/machine-learning/index.html#support-vector-machines
10. Clusteringhttps://www.python3.info/machine-learning/index.html#clustering
11. Neural Networkshttps://www.python3.info/machine-learning/index.html#neural-networks
12. Referenceshttps://www.python3.info/machine-learning/index.html#references
13. Articleshttps://www.python3.info/machine-learning/index.html#articles
1. Abouthttps://www.python3.info/ai/index.html
2. Introductionhttps://www.python3.info/ai/index.html#introduction
1. Paradigmhttps://www.python3.info/oop/index.html
2. Pythonhttps://www.python3.info/oop/index.html#python
2.1. Weakrefhttps://www.python3.info/oop/python/weakref.html
2.1.1. Referenceshttps://www.python3.info/oop/python/weakref.html#references
2.2. OOP Hashhttps://www.python3.info/oop/python/hash.html
2.3. OOP Comparisonhttps://www.python3.info/oop/python/id-vs-eq.html
2.4. OOP Name Manglinghttps://www.python3.info/oop/python/name-mangling.html
2.5. OOP Interninghttps://www.python3.info/oop/python/interning.html
2.6. Namespacehttps://www.python3.info/oop/python/namespace.html
2.7. New and Old Style Classhttps://www.python3.info/oop/python/new-style-classes.html
2.8. Dynamic Typinghttps://www.python3.info/oop/python/dynamic-typing.html
2.9. Monkey Patchinghttps://www.python3.info/oop/python/monkey-patching.html
1. Englishhttps://www.python3.info/dragon/index.html
2. Polishhttps://www.python3.info/dragon/index.html#polish
3. ADRhttps://www.python3.info/dragon/index.html#adr
Python - from None to AIhttps://www.python3.info/index.html
https://www.python3.info/index.html
1. Paradigmhttps://www.python3.info/oop/index.html
https://www.python3.info/oop/python/weakref.html#weakref
[4]https://www.python3.info/oop/python/weakref.html#pydocweakref
[1]https://www.python3.info/oop/python/weakref.html#dunes2016
[2]https://www.python3.info/oop/python/weakref.html#pydocdatamodelobjectvalues
[3]https://www.python3.info/oop/python/weakref.html#mazdak2016
https://www.python3.info/oop/python/weakref.html#references
1https://www.python3.info/oop/python/weakref.html#id2
https://stackoverflow.com/a/36789779https://stackoverflow.com/a/36789779
2https://www.python3.info/oop/python/weakref.html#id3
https://docs.python.org/3/reference/datamodel.html#objects-values-and-typeshttps://docs.python.org/3/reference/datamodel.html#objects-values-and-types
3https://www.python3.info/oop/python/weakref.html#id4
https://stackoverflow.com/a/36788031https://stackoverflow.com/a/36788031
4https://www.python3.info/oop/python/weakref.html#id1
https://docs.python.org/3/library/weakref.htmlhttps://docs.python.org/3/library/weakref.html
Previoushttps://www.python3.info/oop/paradigm/solid-principles.html
Next https://www.python3.info/oop/python/hash.html

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