Added sys module (partly)

Author: dbrattli

src/Fable.Python.fsproj

@@ -12,10 +12,11 @@
     <Compile Include="stdlib/Ast.fs" />
     <Compile Include="stdlib/Builtins.fs" />
     <Compile Include="stdlib/Json.fs" />
+    <Compile Include="stdlib/Math.fs" />
     <Compile Include="stdlib/Os.fs" />
-    <Compile Include="stdlib/TkInter.fs" />
     <Compile Include="stdlib/Queue.fs" />
-    <Compile Include="stdlib/Math.fs" />
+    <Compile Include="stdlib/Sys.fs" />
+    <Compile Include="stdlib/TkInter.fs" />
 
     <Compile Include="cognite-sdk/CogniteSdk.fs" />
     <Compile Include="flask/Flask.fs" />

src/stdlib/Os.fs

@@ -1,14 +1,17 @@
 module Fable.Python.Os
 
+open System.Collections.Generic
 open Fable.Core
 
 // fsharplint:disable MemberNames
 
 type IExports =
+    abstract environ : Dictionary<string, string>
     abstract getenv : key: string -> string option
     abstract getenv : key: string * ``default``: string -> string
     abstract putenv : key: string * value: string -> unit
 
 
+/// Miscellaneous operating system interfaces
 [<ImportAll("os")>]
 let os: IExports = nativeOnly

src/stdlib/Sys.fs

@@ -0,0 +1,33 @@
+module Fable.Python.Sys
+
+open Fable.Core
+
+// fsharplint:disable MemberNames
+
+[<StringEnum>]
+type ByteOrder =
+    | Little
+    | Big
+
+type VersionInfo =
+    abstract major : int
+    abstract minor: int
+    abstract micro: int
+    abstract releaselevel: string
+    abstract serial: int
+
+type IExports =
+    abstract argv : string array
+    abstract byteorder: ByteOrder
+    abstract hexversion: int
+    abstract maxsize: int
+    abstract maxunicode: int
+    abstract path : string array
+    abstract platform : string
+    abstract prefix: string
+    abstract version: string
+    abstract version_info: VersionInfo
+
+/// System-specific parameters and functions
+[<ImportAll("sys")>]
+let sys: IExports = nativeOnly