Level 10 : What happens when trying to access a missing key with d.setdefault(k, v)?


d = {'a': 1, 'b': 2}
print(d.setdefault('c', 3))
print(d)

Author: SandhyaR | Tags: dictionary | 1859+ Python FAQs | Share
list-mutation | name-mangling | matplotlib | list-comprehension | matrix-list-comprehension | invalid-list | built-in-function | literal-characters-and-special-characters | complex | loop-control | mysql | list,-set,-and-dictionary-comprehensions | multiple-inheritance | logical-operator | math-copysign | math | mutable | compute | logical-operation | arithmetic-expression | debugging | using-lists-as-stacks | boolean-masking | static-method | data-structures | namedtuple | list | indentation | introduction-to-threads | lambda | default-mutable-argument | logical-operators | tuples | matrix | attribute | multiprocessing | string | dictionary-methods | loops | method-overloading | string-concatenation | introduction-to-python | creating-and-starting-threads | sys | access-modifier | working-with-dates-and-times | head-and-tail | key-value-pairs | input | anchors-(^,-$) | boolean-and-non-boolean | with-statement | arithmetic-operation | method | string-manipulation | string-slicing | interpreter | magic-method | overflow | context-manager | application | sorting-and-ranking | namespace | zfill-function | version | identifier | handling-missing-values-(fillna,-dropna) | list-vs-tuple | operations | list-slicing | using-join()-and-is_alive()-methods | defining-functions | postfix | shallow-copy | assignment-operator | descriptors | inheritance | input-function | list-operation | string-formatting | exponentiation | class-and-object | floating-point-precision | directory-operations | min-max-function | test-discovery | control-statement | lambdas | asyncio | error | assignment-operators | fabs-function | functions | identity-operators-(is,-is-not) | stack | tuple | strings | lists | zip-function | overriding-methods | indexing | syntax-error | list-methods-and-slicing | string-method | mapping-function | syntax-error | min-function | exception-handling | sorting | identity-operator | recursion | threading | file_handling | filter-function | using-else-and-finally | version-check | conditional-statements | integers | loop | python-operators | why-use-multiprocessing-over-threading?-(gil) | exception | pandas | control-flow | filter | reading:-read(),-readline(),-readlines() | object-attribute | data-type | command-line-parsing | generator | precedence-and-associativity | datetime | virtual-environment | booleans | regular-expressions | goto-function | benefit | python-repl | import-method | basic | constructor | escape-operator | operators | function | mathematics | sets | library | list-comprehension | numpy | iterable | operator-and | expression | single-inheritance | dictionaries | docstring | binary | set | enumerate() | multiple-inheritance | inherit | python-module | round-function | class-decorators | walking-through-directories-using-os.walk() | class-and-inheritance | global | complex-number | list-method | data-structures-in-python | format | data-type | virtual-environment | python-history | counter | difference-between-threads-and-processes | membership-operators-(in,-not-in) | int | deep-copy | managing-directories-with-os-and-shutil | datatype | implementation | data-type-conversions | python-syntax-and-structure | functional-programming | working-with-temporary-files-using-tempfile | multithreading | operator-or | join | factorial-function | nested-loop | generators-in-python | error-handling | append | comprehension | touples | intering | python | map-function | lambda-function | immutable-data-type | numeric | operator-overloading | control-flow | conversion | logical-operator | regular-expression | scientific-notation | polymorphism | comment | global-variable | type_conversion | file-handling | pseudocode | quantifiers-(*,-+,-?,-{}) | input-function | functional-programming | raise | memory | arbitrary-arguments-(*args,-**kwargs) | thread-synchronization | typeerror | default-arguments | generators | swapping | counter-function | def | yield | condition | multiple-except-blocks | datetime.date,-datetime.time,-datetime.datetime | set-operation | else-statement | regex | max-min | installation | identity-operator | __all__-attribute | loop-control-statements | list-join | memory-management | operator | statement | mathematical-function | async | python-django | module | dicts | match | decimal | dataframe-and-series-objects | pep | tuple-methods | introduction-to-multiprocessing | oop | round | error-handling | creating-custom-modules | while-loops | using-os-and-pathlib-modules | pass | tuple-unpacking | frozenset | decorator | objects | raise-statement | dictionary-comprehensions | reading-and-writing-files | unit-testing | random | file | range | exception-handling | opening-files-(open()) | global-keyword | list-comprehensions | data_structure | keyword | thread | data-structure | working-with-binary-files-(rb,-wb) | pickling--unpickling | destructor | iterator | python_version | sorted | binary-operation | collection | copy | oops | classes | time-series-with-pandas | else | while-else-loop | type-conversion | package-management | precedence | id-function | init | parameter | parsing-with-strptime | staticmethod | operand | global-variable | print | random-function | string-slicing | conditional-statement | data-types | rollback | design-principle | joining-and-merging-dataframes | odd-number | print-statement | lambda-functions | methods | sys-module | boolean | recurssion | dictionary | update | call | indexing:-loc-vs-iloc | using-map()-for-transformations | collections | comparison | aggregating-data-with-functools.reduce() | feature | using-yield-in-functions | __init_subclass__ | conditional-statement | while-and-for-loop | encapsulation | thread-safe-data-structures-(queue.queue) | turtle | heap-memory | bitwise | slicing | data-structure | software-design | syntax | array | zip | advanced-file-operations | built-in | encoding | gil | sum-function | bitwise-operator | syntaxerror | return-statement | expand-tab | writing:-write(),-writelines() | choice | using-the-threading-module | file-handling | higher-order-function | built-in-function | class-and-instance-variable | slice | type-conversion-and-casting | for | split | variable | immutability | asyncio-module | filtering-and-indexing | assert | string-method | iterators | string-methods | bitwise-operator | function-and-scope | floats | class | type-conversion | string-iteration | using-assertions-(assertequal,-assertraises) | while-loop | built-in-modules | formatting-with-strftime | center | string-formatting | formal-and-actual-parameter | reading-and-writing-large-files-efficiently | __future__ | list-indexing | function-argument | working-with-file-paths | sum() | integer ...