Level 9 : Which one is not a correct variable name?

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