diff --git a/UML.wsd b/UML.wsd
new file mode 100644
index 0000000..0d00ee3
--- /dev/null
+++ b/UML.wsd
@@ -0,0 +1,8 @@
+@startuml
+
+class Device {
+    +id: string
+    +name: string
+    +model: string
+    +getInterfaces()
+}
\ No newline at end of file
diff --git a/check_correct.py b/check_correct.py
new file mode 100644
index 0000000..ba0359e
--- /dev/null
+++ b/check_correct.py
@@ -0,0 +1,20 @@
+from parse import parse_csv_to_structure
+
+
+def check_correct(data):
+    assert isinstance(data, dict)
+
+    for key, value in data.items():
+        assert isinstance(key, str)
+        assert isinstance(value, dict)
+
+        # for subkey, subvalue in value.items():
+        #     assert isinstance(subkey, str)
+        #     assert isinstance(subvalue, str)
+
+
+if __name__ == "__main__":
+    data = parse_csv_to_structure("input.csv")
+    if check_correct(data):
+        print("yay!")
+    print(data)
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..333e23c
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1763421233,
+        "narHash": "sha256-Stk9ZYRkGrnnpyJ4eqt9eQtdFWRRIvMxpNRf4sIegnw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "89c2b2330e733d6cdb5eae7b899326930c2c0648",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..07fa9b8
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,21 @@
+{
+  description = "Python development env with venv + Jupyter";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = import nixpkgs { inherit system; };
+      in {
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            python312
+            python312Packages.virtualenv
+            python312Packages.pip
+          ];
+        };
+      });
+}
diff --git a/input.csv b/input.csv
new file mode 100644
index 0000000..21a7b21
--- /dev/null
+++ b/input.csv
@@ -0,0 +1,3 @@
+ , prop1 , prop2 , prop3 
+ob1 , val1 , , val2 
+obj2 , , val3 , val4
\ No newline at end of file
diff --git a/parse.py b/parse.py
new file mode 100644
index 0000000..ed0a1ef
--- /dev/null
+++ b/parse.py
@@ -0,0 +1,30 @@
+import csv
+
+def parse_csv_to_structure(path):
+    result = {}
+
+    with open(path, newline='') as f:
+        reader = csv.reader(f)
+        rows = list(reader)
+
+    headers = rows[0][1:]
+    
+    for row in rows[1:]:
+        obj = row[0].strip()
+        
+        if not obj:
+            continue
+        
+        result[obj] = {}
+        for header, value in zip(headers, row[1:]):
+            value = value.strip()
+            
+            if value:
+                result[obj][header] = value
+
+    return result
+
+
+if __name__ == "__main__":
+    data = parse_csv_to_structure("input.csv")
+    print(data)
diff --git a/structures copy.py b/structures copy.py
new file mode 100644
index 0000000..7b256fd
--- /dev/null
+++ b/structures copy.py	
@@ -0,0 +1,23 @@
+class Wire:
+    def __init__(self, from_device, to_device):
+        self.from_device = from_device
+        self.to_device = to_device
+
+
+class Device:
+    def __init__(self, name, model, properties):
+        self.name = name
+        self.model = model
+        self.properties = properties
+
+
+class Switch(Device):
+    pass
+
+
+class Router(Device):
+    pass
+
+
+class Host(Device):
+    pass
diff --git a/structures.py b/structures.py
new file mode 100644
index 0000000..48df349
--- /dev/null
+++ b/structures.py
@@ -0,0 +1,61 @@
+from dataclasses import dataclass, field
+from typing import Dict, Any
+
+
+@dataclass
+class Device:
+    name: str
+    model: str
+    properties: Dict[str, Any] = field(default_factory=dict)
+
+    def __post_init__(self):
+        if not self.name:
+            raise ValueError("Device name cannot be empty")
+        if not self.model:
+            raise ValueError("Device model cannot be empty")
+        if not isinstance(self.properties, dict):
+            raise TypeError("properties must be a dict")
+
+
+@dataclass
+class Switch(Device):
+    def __post_init__(self):
+        super().__post_init__()
+
+        if "ports" not in self.properties:
+            raise ValueError(f"Switch '{self.name}' must define 'ports'")
+        if (
+            not isinstance(self.properties["ports"], int)
+            or self.properties["ports"] <= 0
+        ):
+            raise ValueError("'ports' must be a positive integer")
+
+
+@dataclass
+class Router(Device):
+    def __post_init__(self):
+        super().__post_init__()
+
+        if "interfaces" not in self.properties:
+            raise ValueError(f"Router '{self.name}' must define 'interfaces'")
+        if (
+            not isinstance(self.properties["interfaces"], int)
+            or self.properties["interfaces"] <= 0
+        ):
+            raise ValueError("'interfaces' must be a positive integer")
+
+
+@dataclass
+class Host(Device):
+    def __post_init__(self):
+        super().__post_init__()
+
+        ip = self.properties.get("ip")
+        if not ip or not isinstance(ip, str):
+            raise ValueError(f"Host '{self.name}' must contain a valid 'ip' string")
+
+
+@dataclass
+class Wire:
+    from_device: Device
+    to_device: Device