Level 1 : Which of the following is an invalid variable?

Author: Pavan | Tags: variable | 1736+ Python FAQs | Share
for | python-module | lambda-function | while-else-loop | magic-method | class-and-inheritance | conditional-statement | while-loop | feature | exception-handling | encapsulation | function | zip | collections | data-structure | string-iteration | while-and-for-loop | input-function | matplotlib | bitwise-operator | file-handling | keyword | data-structures | bitwise-operator | expression | software-design | copy | min-function | static-method | logical-operation | arithmetic-operation | type-conversion | error | decimal | debugging | threading | inherit | precedence | else-statement | dictionaries | tuple | data-structure | overflow | function-argument | type-conversion | classes | string-manipulation | pep | dictionary | list-method | sorting | complex-number | global-keyword | function-and-scope | loop-control | regex | odd-number | split | oop | return-statement | operator | conversion | python | mapping-function | shallow-copy | encoding | postfix | dicts | operator-or | format | sum-function | statement | enumerate() | docstring | sys | list-join | min-max-function | python_version | memory-management | asyncio-module | __future__ | complex | string-method | update | conditional-statement | python-repl | lambdas | data-type | class-and-instance-variable | descriptors | command-line-parsing | numpy | heap-memory | indexing | recurssion | id-function | iterator | datatype | iterable | default-mutable-argument | def | math | lists | built-in-function | gil | comment | generator | method | file-handling | range | multiprocessing | identity-operator | operator-and | memory | fabs-function | random-function | array | immutable-data-type | int | generators | decorator | compute | binary | recursion | append | regular-expression | control-flow | file | sorted | identifier | thread | data-type | filter-function | class | boolean-and-non-boolean | counter-function | round | pandas | binary-operation | file_handling | constructor | string-concatenation | assert | choice | string | __all__-attribute | installation | type_conversion | version | data_structure | library | call | matrix-list-comprehension | class-and-object | center | condition | package-management | comparison | list-mutation | namespace | oops | exception-handling | print | arithmetic-expression | exponentiation | turtle | design-principle | typeerror | basic | mysql | python-django | staticmethod | deep-copy | map-function | namedtuple | datetime | mathematics | counter | multiple-inheritance | list-slicing | indentation | attribute | parameter | objects | name-mangling | functions | version-check | yield | immutability | goto-function | stack | list-comprehension | integer | interpreter | operations | lambda | loops | factorial-function | numeric | assignment-operator | scientific-notation | rollback | benefit | filter | matrix | implementation | loop | context-manager | precedence-and-associativity | string-slicing | with-statement | built-in-function | zip-function | async | module | string-formatting | operator-overloading | set-operation | import-method | global-variable | access-modifier | string-slicing | multithreading | floating-point-precision | set | global-variable | higher-order-function | logical-operator | error-handling | bitwise | generators-in-python | python-history | __init_subclass__ | max-min | variable | sum() | string-formatting | syntax | pseudocode | list | built-in | zfill-function | logical-operator | head-and-tail | application | mutable | object-attribute | control-statement | round-function | join | random | methods | frozenset | init | match | syntax-error | nested-loop | syntaxerror | input-function | list-indexing | touples | string-method | slice | operand | polymorphism | virtual-environment | list-vs-tuple | identity-operator | operators | raise | functional-programming | exception | syntax-error | input | swapping | escape-operator | asyncio | formal-and-actual-parameter | mathematical-function | math-copysign | control-flow | boolean | pickling-&-unpickling | list-operation | destructor | invalid-list | list-comprehension | print-statement | slicing | virtual-environment | expand-tab | inheritance | comprehension | tuple-unpacking | collection | global | sys-module ...