NamespaceCollision issue / unable to load project

[trentmc]

From vikram in tokenspice discord:

I tried running 
pytest sol057/contracts/simpletoken/test/test_Simpletoken.py::test_transfer
 and I get an 
ERROR: Unable to load project
 and 
NamespaceCollision: Multiple contracts or interfaces with the same name

Full trace:

(venv) witwiki@v:~/Documents/GitHub/tokenspice$ pytest sol057/contracts/simpletoken/test/test_Simpletoken.py::test_transfer
  File "brownie/test/plugin.py", line 87, in pytest_load_initial_conftests
    active_project = project.load(project_path)
  File "brownie/project/main.py", line 751, in load
    return Project(name, project_path)
  File "brownie/project/main.py", line 183, in __init__
    self.load()
  File "brownie/project/main.py", line 193, in load
    self._sources = Sources(contract_sources, interface_sources)
  File "brownie/project/sources.py", line 58, in __init__
    raise NamespaceCollision(
NamespaceCollision: Multiple contracts or interfaces with the same name
  c: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol, contracts/node_modules/solparse/test/doc_examples.sol
  test: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol, contracts/node_modules/solparse/test/doc_examples.sol
  A: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/BlankLines.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/FunctionDeclaration.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/accept/function.sol, contracts/node_modules/solparse/test/doc_examples.sol
  derived: contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol
  test2: contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol
  bar: contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol
  C: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/BlankLines.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/FunctionDeclaration.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol, contracts/node_modules/solparse/test/doc_examples.sol
  Lib: contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol
  D: contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/FunctionDeclaration.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol
  B: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/BlankLines.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/FunctionDeclaration.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/accept/function.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/function.sol, contracts/node_modules/solparse/test/doc_examples.sol
  FunctionCalls: contracts/node_modules/prettier-plugin-solidity/tests/format/FunctionCalls/FunctionCalls.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StyleGuide/MaximumLineLength.sol
  Contract: contracts/node_modules/prettier-plugin-solidity/tests/format/Etc/Etc.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/StateVariableDeclarations/StateVariableDeclarations.sol, contracts/node_modules/truffle/test/sources/contract_names/contracts/contract.sol, contracts/node_modules/truffle/test/sources/db_enabled/contracts/contract.sol, contracts/node_modules/truffle/test/sources/develop/contracts/contract.sol
  Comments8: contracts/node_modules/prettier-plugin-solidity/tests/format/Comments/Comments.sol
  Sharer: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol, contracts/node_modules/solparse/test/doc_examples.sol
  Foo: contracts/node_modules/prettier-plugin-solidity/tests/format/quotes/Quotes.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/one-line-array.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/one-line-function-call.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/one-line-struct.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/struct.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/chars-before-top-level.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/config-default.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/indented-top-level-closing-brace.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/struct.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/top-level-indent.sol, contracts/node_modules/solium/test/lib/rules/quotes/double-full.sol, contracts/node_modules/solium/test/lib/rules/quotes/single-full.sol, contracts/node_modules/solparse/test/doc_examples.sol
  ModifierDefinitions: contracts/node_modules/prettier-plugin-solidity/tests/format/ModifierDefinitions/ModifierDefinitions.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/ModifierInvocations/ModifierInvocations.sol
  Example: contracts/node_modules/prettier-plugin-solidity/tests/format/Issues/Issue205.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/PrettierIgnore/PrettierIgnore.sol, contracts/node_modules/truffle/build/templates/Example.sol, contracts/node_modules/truffle/test/sources/migrations/error/contracts/Example.sol, contracts/node_modules/truffle/test/sources/migrations/fabric-evm/contracts/Example.sol, contracts/node_modules/truffle/test/sources/migrations/production/contracts/Example.sol, contracts/node_modules/truffle/test/sources/migrations/quorum/contracts/Example.sol, contracts/node_modules/truffle/test/sources/migrations/success/contracts/Example.sol
  FeedConsumer: contracts/node_modules/prettier-plugin-solidity/tests/format/TryCatch/TryCatch.sol, contracts/node_modules/solidity-coverage/node_modules/@solidity-parser/parser/antlr/test.sol
  ArithmeticOperators: contracts/node_modules/prettier-plugin-solidity/tests/format/BinaryOperators/BinaryOperators.sol
  Base: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  Derived: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  child: contracts/node_modules/solparse/test/doc_examples.sol
  IntegerSet: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  User: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  DualIndex: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  TestPrivate: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  TestInternal: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  FromSolparse: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  CommentedOutFunction: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  VarHasBrackets: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  UsingExampleLibrary: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  UsingExampleContract: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  NewStuff: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  MyContract: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  GetCode: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  assemblyLocalBinding: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  assemblyReturn: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  usesConst: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  memoryArrays: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  DeclarativeExpressions: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  VariableDeclarationTuple: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  TypeIndexSpacing: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  Ballot: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  multilineReturn: contracts/node_modules/prettier-plugin-solidity/tests/format/AllSolidityFeatures/AllSolidityFeatures.sol, contracts/node_modules/solparse/test/doc_examples.sol
  UsesNewConstructor: contracts/node_modules/solparse/test/doc_examples.sol
  TestWithBalance: contracts/node_modules/truffle/test/scenarios/solidity_testing/ImportEverything.sol, contracts/node_modules/truffle/test/scenarios/solidity_testing/TestWithBalance.sol
  Migrations: contracts/contracts/Migrations.sol, contracts/node_modules/@ensdomains/ens/contracts/Migrations.sol, contracts/node_modules/@ensdomains/resolver/contracts/Migrations.sol, contracts/node_modules/truffle/build/initSource/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/contract_names/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/db_enabled/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/develop/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/ethpm/installed_contracts/tokens/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/external_compile/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/inheritance/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/install/init/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/migrations/error/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/migrations/fabric-evm/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/migrations/init/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/migrations/production/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/migrations/quorum/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/migrations/success/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/migrations/unhandled-rejection/contracts/Migrations.sol, contracts/node_modules/truffle/test/sources/networks/metacoin/contracts/Migrations.sol
  Importer: contracts/node_modules/truffle/test/sources/monorepo/errorproject/contracts/Importer.sol, contracts/node_modules/truffle/test/sources/monorepo/truffleproject/contracts/Importer.sol
  LeafB: contracts/node_modules/truffle/test/sources/inheritance/contracts/LeafB.sol, contracts/node_modules/truffle/test/sources/vyper-imports/contracts/LeafB.vy
  Root: contracts/node_modules/truffle/test/sources/inheritance/contracts/Root.sol, contracts/node_modules/truffle/test/sources/vyper-imports/contracts/Root.vy
  LeafC: contracts/node_modules/truffle/test/sources/inheritance/contracts/LeafC.sol, contracts/node_modules/truffle/test/sources/vyper-imports/contracts/LeafC.vy
  LeafA: contracts/node_modules/truffle/test/sources/inheritance/contracts/LeafA.sol, contracts/node_modules/truffle/test/sources/vyper-imports/contracts/LeafA.vy
  Branch: contracts/node_modules/truffle/test/sources/inheritance/contracts/Branch.sol, contracts/node_modules/truffle/test/sources/vyper-imports/contracts/Branch.vy
  InnerLibrary: contracts/node_modules/truffle/test/sources/contract_names/contracts/contract.sol, contracts/node_modules/truffle/test/sources/db_enabled/contracts/contract.sol
  RelativeImport: contracts/node_modules/truffle/test/sources/contract_names/contracts/relative_import.sol, contracts/node_modules/truffle/test/sources/db_enabled/contracts/relative_import.sol
  ConvertLib: contracts/node_modules/truffle/test/sources/external_compile/contracts/ConvertLib.sol, contracts/node_modules/truffle/test/sources/networks/metacoin/contracts/ConvertLib.sol
  MetaCoin: contracts/node_modules/truffle/test/sources/external_compile/contracts/MetaCoin.sol, contracts/node_modules/truffle/test/sources/networks/metacoin/contracts/MetaCoin.sol
  UsesLibrary: contracts/node_modules/truffle/test/sources/migrations/fabric-evm/contracts/UsesLibrary.sol, contracts/node_modules/truffle/test/sources/migrations/quorum/contracts/UsesLibrary.sol, contracts/node_modules/truffle/test/sources/migrations/success/contracts/UsesLibrary.sol
  Loops: contracts/node_modules/truffle/test/sources/migrations/error/contracts/Loops.sol, contracts/node_modules/truffle/test/sources/migrations/fabric-evm/contracts/Loop.sol, contracts/node_modules/truffle/test/sources/migrations/quorum/contracts/Loop.sol, contracts/node_modules/truffle/test/sources/migrations/success/contracts/Loop.sol
  PayableExample: contracts/node_modules/truffle/test/sources/migrations/fabric-evm/contracts/PayableExample.sol, contracts/node_modules/truffle/test/sources/migrations/quorum/contracts/PayableExample.sol, contracts/node_modules/truffle/test/sources/migrations/success/contracts/PayableExample.sol
  IsLibrary: contracts/node_modules/truffle/test/sources/migrations/fabric-evm/contracts/IsLibrary.sol, contracts/node_modules/truffle/test/sources/migrations/quorum/contracts/IsLibrary.sol, contracts/node_modules/truffle/test/sources/migrations/success/contracts/IsLibrary.sol
  UsesExample: contracts/node_modules/truffle/test/sources/migrations/error/contracts/UsesExample.sol, contracts/node_modules/truffle/test/sources/migrations/fabric-evm/contracts/UsesExample.sol, contracts/node_modules/truffle/test/sources/migrations/quorum/contracts/UsesExample.sol, contracts/node_modules/truffle/test/sources/migrations/success/contracts/UsesExample.sol
  AssertAddress: contracts/node_modules/@truffle/resolver/solidity/AssertAddress.sol, contracts/node_modules/truffle/build/AssertAddress.sol
  SafeSend: contracts/node_modules/@truffle/resolver/solidity/SafeSend.sol, contracts/node_modules/truffle/build/SafeSend.sol
  AssertBool: contracts/node_modules/@truffle/resolver/solidity/AssertBool.sol, contracts/node_modules/truffle/build/AssertBool.sol
  AssertBytes32: contracts/node_modules/@truffle/resolver/solidity/AssertBytes32.sol, contracts/node_modules/truffle/build/AssertBytes32.sol
  AssertInt: contracts/node_modules/@truffle/resolver/solidity/AssertInt.sol, contracts/node_modules/truffle/build/AssertInt.sol
  AssertAddressArray: contracts/node_modules/@truffle/resolver/solidity/AssertAddressArray.sol, contracts/node_modules/truffle/build/AssertAddressArray.sol
  AssertUint: contracts/node_modules/@truffle/resolver/solidity/AssertUint.sol, contracts/node_modules/truffle/build/AssertUint.sol
  Assert: contracts/node_modules/@truffle/resolver/solidity/Assert.sol, contracts/node_modules/truffle/build/Assert.sol
  AssertGeneral: contracts/node_modules/@truffle/resolver/solidity/AssertGeneral.sol, contracts/node_modules/truffle/build/AssertGeneral.sol
  AssertBalance: contracts/node_modules/@truffle/resolver/solidity/AssertBalance.sol, contracts/node_modules/truffle/build/AssertBalance.sol
  AssertString: contracts/node_modules/@truffle/resolver/solidity/AssertString.sol, contracts/node_modules/truffle/build/AssertString.sol
  AssertUintArray: contracts/node_modules/@truffle/resolver/solidity/AssertUintArray.sol, contracts/node_modules/truffle/build/AssertUintArray.sol
  AssertIntArray: contracts/node_modules/@truffle/resolver/solidity/AssertIntArray.sol, contracts/node_modules/truffle/build/AssertIntArray.sol
  AssertBytes32Array: contracts/node_modules/@truffle/resolver/solidity/AssertBytes32Array.sol, contracts/node_modules/truffle/build/AssertBytes32Array.sol
  Dodo: contracts/node_modules/solium/test/lib/rules/array-declarations/fixed/ws-btw-op-clos.sol, contracts/node_modules/solium/test/lib/rules/array-declarations/unfixed/mixed.sol, contracts/node_modules/solium/test/lib/rules/array-declarations/unfixed/ws-btw-lit-op.sol, contracts/node_modules/solium/test/lib/rules/array-declarations/unfixed/ws-btw-op-clos.sol
  Abc: contracts/node_modules/solium/test/lib/rules/blank-lines/accept/contract-single.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/accept/contract.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/accept/library-single.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/accept/library.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/contract.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/library.sol
  Bcd: contracts/node_modules/solium/test/lib/rules/blank-lines/accept/contract.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/accept/library.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/contract.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/library.sol
  Cde: contracts/node_modules/solium/test/lib/rules/blank-lines/accept/contract.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/accept/library.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/contract.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/library.sol
  Def: contracts/node_modules/solium/test/lib/rules/blank-lines/reject/contract.sol, contracts/node_modules/solium/test/lib/rules/blank-lines/reject/library.sol
  Counter: contracts/node_modules/solium/test/lib/rules/indentation/accept/config-default.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/config-tabs.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/config-two-spaces.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/multiline-array.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/multiline-call-declaration.sol, contracts/node_modules/solium/test/lib/rules/indentation/accept/multiline-call-expression.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/config-tabs.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/config-two-spaces.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/mixed-tabs-spaces.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/multiline-array.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/multiline-call-declaration.sol, contracts/node_modules/solium/test/lib/rules/indentation/reject/multiline-call-expression.sol
  Ownable: contracts/node_modules/openzeppelin-solidity/contracts/ownership/Ownable.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/Ownable/Ownable.sol
  Arrays: contracts/node_modules/openzeppelin-solidity/contracts/utils/Arrays.sol, contracts/node_modules/prettier-plugin-solidity/tests/format/Arrays/Arrays.sol
  NameResolver: contracts/node_modules/@ensdomains/ens/contracts/ReverseRegistrar.sol, contracts/node_modules/@ensdomains/resolver/contracts/profiles/NameResolver.sol

ERROR: Unable to load project

[trentmc]

Easiest fix is to rename or move the directory.

I just updated the README with this, so people know.

bf36bd2