adding yaml file parsing for config load with cache and util get method

Author: mpinner

ansible/example/yml-parse/config.yml

@@ -0,0 +1,16 @@
+# YAML config for Laika feature seg notebooks and training environment
+# setup default values for developers as working starting point to execute training scripts
+# provide human readable and machine diffable explaination of what are a training's parameters
+
+input:
+  root_media: "/data/GDrive/featureseg"
+
+training:
+  img_width: 224
+  img_height: 224
+  num_points: 24
+
+
+
+output:
+  model_folder: "/data/GDrive/featureseg/models"

ansible/example/yml-parse/load_config.py

@@ -0,0 +1,32 @@
+# yaml test script to load and verify our configs
+# todo arg parse
+import yaml
+from functools import reduce
+
+
+class Config:
+    def __init__(self, filename="config.yml"):
+        self.filename = filename
+        self.config = self.load_config()
+
+    def load_config(self, filename=None):
+        if not filename:
+            filename = self.filename
+        with open(filename) as f:
+            config = yaml.load(f, Loader=yaml.SafeLoader)
+            return config
+
+    def get(self, key, config=None):
+        if not config:
+            config = self.config
+        return reduce(lambda c, k: c[k], key.split('.'), config)
+
+
+if __name__ == "__main__":
+    cfg = Config()
+    config = cfg.load_config("config.yml")
+    print(config)
+    print(config['input']['root_media'])
+    print(cfg.get('input.root_media', config))
+    print(cfg.get('input.root_media'))
+

ansible/example/yml-parse/requirements.txt

@@ -0,0 +1 @@
+pyyaml