Level 1 : What happens if we call __next__() manually?


class SimpleIter:
    def __init__(self):
        self.count = 0

    def __iter__(self):
        return self

    def __next__(self):
        self.count += 1
        if self.count > 3:
            raise StopIteration
        return self.count

it = SimpleIter()
print(it.__next__())
print(it.__next__())
print(it.__next__())
print(it.__next__())

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