[IronPython] Importing System in IronPython 2 beta 5

[Michael Foord]

Ronnie Maor wrote:
> I get the same problem.
>
> Another symptom is that "import System" fails if you don't 
> AddReference first. never needed to do that for IPy 1.1 and don't need 
> to either when running ipy 2.0.
>

When embedding IronPython you need to add references to both 
'System.dll' and 'mscorlib.dll'. This is done for you in the console, 
but not when embedding IronPython.

You can do this using the 'LoadAssembly' method of the ScriptRuntime:

_runtime.LoadAssembly(typeof(String).Assembly);
_runtime.LoadAssembly(typeof(Uri).Assembly);

Michael

> It fails with my hosting code, and also reproduces with the "hello 
> world" hosting sample:
> http://blogs.msdn.com/seshadripv/archive/2008/09/11/dlr-hosting-sample-simple-dlr-host-using-the-new-app-config-based-scriptruntime-creation.aspx
>
> The only changes I made to the sample were
> 1) delete ruby configuration from App.config and the line of code that 
> builds a ruby engine (I don't have the assemblies for ruby)
> 2) change the line defining the source code to:
>             ScriptSource source = 
> pyEng.CreateScriptSourceFromString(@"import System", 
> SourceCodeKind.Statements);
> 3) remove the code that gets the "output" variable from pyEng (since 
> we don't produce it)
>
> like I said, this fails with "No module named System".
> If you add a clr.AddReference("System"), then import works, but dir() 
> seems to only show namespaces and not types, so import System.DateTime 
> will fail.
>
> I'm now looking at sources for IronPythonConsole to see what the 
> difference is, but if someone knows what I'm doing wrong, please tell...
>
> thanks
> Ronnie
>
> On Sun, Sep 21, 2008 at 8:31 AM, Serge R <deus.verus at gmail.com 
> <mailto:deus.verus at gmail.com>> wrote:
>
>     I am migrating from 1.1 and have been unable to import System.Math
>     class. I took a look at what's actually been imported
>
>     clr.AddReference("System")
>     import System
>     print dir(System)
>
>     On IP2 I got a small list that didn't contain Math or many other
>     classes. Am I referencing something wrong?
>
>     IP2 List:
>     ['CodeDom', 'Collections', 'ComponentModel', 'Configuration',
>     'Diagnostics', 'FileStyleUriParser', 'FtpStyleUriParser',
>     'GenericUriParser', 'GenericUriParserOptions',
>     'GopherStyleUriParser', 'HttpStyleUriParser', 'IO',
>     'LdapStyleUriParser', 'Media', 'Net', 'NetPipeStyleUriParser',
>     'NetTcpStyleUriParser', 'NewsStyleUriParser', 'Runtime',
>     'Security', 'Text', 'Threading', 'Timers', 'Uri', 'UriBuilder',
>     'UriComponents', 'UriFormat', 'UriFormatException',
>     'UriHostNameType', 'UriIdnScope', 'UriKind', 'UriParser',
>     'UriPartial', 'UriTypeConverter', 'Web']
>
>     IP1 List:
>     ['AccessViolationException', 'Action', 'ActivationContext',
>     'Activator', 'AppDomain', 'AppDomainInitializer',
>     'AppDomainManager', 'AppDomainManagerInitializationOptions',
>     'AppDomainSetup', 'AppDomainUnloadedException',
>     'ApplicationException', 'ApplicationId', 'ApplicationIdentity',
>     'ArgIterator', 'ArgumentException', 'ArgumentNullException',
>     'ArgumentOutOfRangeException', 'ArithmeticException', 'Array',
>     'ArraySegment', 'ArrayTypeMismatchException',
>     'AssemblyLoadEventArgs', 'AssemblyLoadEventHandler',
>     'AsyncCallback', 'Attribute', 'AttributeTargets',
>     'AttributeUsageAttribute', 'BadImageFormatException',
>     'Base64FormattingOptions', 'BitConverter', 'Boolean', 'Buffer',
>     'Byte', 'CLSCompliantAttribute', 'CannotUnloadAppDomainException',
>     'Char', 'CharEnumerator', 'CodeDom', 'Collections', 'Comparison',
>     'ComponentModel', 'Configuration', 'Console',
>     'ConsoleCancelEventArgs', 'ConsoleCancelEventHandler',
>     'ConsoleColor', 'ConsoleKey', 'ConsoleKeyInfo',
>     'ConsoleModifiers', 'ConsoleSpecialKey', 'ContextBoundObject',
>     'ContextMarshalException', 'ContextStaticAttribute', 'Convert',
>     'Converter', 'CrossAppDomainDelegate', 'DBNull',
>     'DataMisalignedException', 'DateTime', 'DateTimeKind',
>     'DateTimeOffset', 'DayOfWeek', 'Decimal', 'Delegate',
>     'Deployment', 'Diagnostics', 'DivideByZeroException',
>     'DllNotFoundException', 'Double', 'DuplicateWaitObjectException',
>     'EntryPointNotFoundException', 'Enum', 'Environment',
>     'EnvironmentVariableTarget', 'EventArgs', 'EventHandler',
>     'Exception', 'ExecutionEngineException', 'FieldAccessException',
>     'FileStyleUriParser', 'FlagsAttribute', 'FormatException',
>     'FtpStyleUriParser', 'GC', 'GCCollectionMode', 'GenericUriParser',
>     'GenericUriParserOptions', 'Globalization',
>     'GopherStyleUriParser', 'Guid', 'HttpStyleUriParser',
>     'IAppDomainSetup', 'IAsyncResult', 'ICloneable', 'IComparable',
>     'IConvertible', 'ICustomFormatter', 'IDisposable', 'IEquatable',
>     'IFormatProvider', 'IFormattable', 'IO', 'IServiceProvider',
>     'IndexOutOfRangeException', 'InsufficientMemoryException',
>     'Int16', 'Int32', 'Int64', 'IntPtr', 'InvalidCastException',
>     'InvalidOperationException', 'InvalidProgramException',
>     'LdapStyleUriParser', 'LoaderOptimization',
>     'LoaderOptimizationAttribute', 'LocalDataStoreSlot',
>     'MTAThreadAttribute', 'MarshalByRefObject', 'Math', 'Media',
>     'MemberAccessException', 'MethodAccessException',
>     'MidpointRounding', 'MissingFieldException',
>     'MissingMemberException', 'MissingMethodException',
>     'ModuleHandle', 'MulticastDelegate',
>     'MulticastNotSupportedException', 'Net', 'NetPipeStyleUriParser',
>     'NetTcpStyleUriParser', 'NewsStyleUriParser',
>     'NonSerializedAttribute', 'NotFiniteNumberException',
>     'NotImplementedException', 'NotSupportedException',
>     'NullReferenceException', 'Nullable', 'Object',
>     'ObjectDisposedException', 'ObsoleteAttribute', 'OperatingSystem',
>     'OperationCanceledException', 'OutOfMemoryException',
>     'OverflowException', 'ParamArrayAttribute', 'PlatformID',
>     'PlatformNotSupportedException', 'Predicate', 'Random',
>     'RankException', 'Reflection', 'ResolveEventArgs',
>     'ResolveEventHandler', 'Resources', 'Runtime',
>     'RuntimeArgumentHandle', 'RuntimeFieldHandle',
>     'RuntimeMethodHandle', 'RuntimeTypeHandle', 'SByte',
>     'STAThreadAttribute', 'Security', 'SerializableAttribute',
>     'Single', 'StackOverflowException', 'String', 'StringComparer',
>     'StringComparison', 'StringSplitOptions', 'SystemException',
>     'Text', 'ThreadStaticAttribute', 'Threading', 'TimeSpan',
>     'TimeZone', 'TimeoutException', 'Timers', 'Type', 'TypeCode',
>     'TypeInitializationException', 'TypeLoadException',
>     'TypeUnloadedException', 'TypedReference', 'UInt16', 'UInt32',
>     'UInt64', 'UIntPtr', 'UnauthorizedAccessException',
>     'UnhandledExceptionEventArgs', 'UnhandledExceptionEventHandler',
>     'Uri', 'UriBuilder', 'UriComponents', 'UriFormat',
>     'UriFormatException', 'UriHostNameType', 'UriIdnScope', 'UriKind',
>     'UriParser', 'UriPartial', 'UriTypeConverter', 'ValueType',
>     'Version', 'Void', 'WeakReference', 'Web', '_AppDomain',
>     '__builtins__', '__dict__', '__name__']
>
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