use juliapkg to manage julia dependencies

Author: Christopher Doris

python/juliacall/__init__.py

@@ -1,4 +1,42 @@
 __version__ = '0.5.1'
-CONFIG = dict(embedded=False)
-from .all import *
-from . import init
+
+CONFIG = {}
+
+def newmodule(name):
+    "A new module with the given name."
+    from . import Base
+    return Base.Module(Base.Symbol(name))
+
+class As:
+    "Interpret 'value' as type 'type' when converting to Julia."
+    __slots__ = ("value", "type")
+    __module__ = "juliacall"
+    def __init__(self, value, type):
+        self.value = value
+        self.type = type
+    def __repr__(self):
+        return "juliacall.As({!r}, {!r})".format(self.value, self.type)
+
+class JuliaError(Exception):
+    "An error arising in Julia code."
+    __module__ = "juliacall"
+    def __init__(self, exception, stacktrace=None):
+        super().__init__(exception, stacktrace)
+    def __str__(self):
+        e = self.exception
+        if isinstance(e, str):
+            return e
+        else:
+            from . import Base
+            io = Base.IOBuffer()
+            Base.showerror(io, e)
+            return str(Base.String(Base.take_b(io)))
+    @property
+    def exception(self):
+        return self.args[0]
+    @property
+    def stacktrace(self):
+        return self.args[1]
+
+from .init import init
+init()