adds test function

src/main.py

@@ -0,0 +1,47 @@
+import os, json, requests
+from getpass import getpass
+from classes import Header
+
+def get_sample_layers_data(elabid):
+    '''
+    Return the following data from every eLabFTW experiment linked
+    to a certain sample, identified by elabid.
+
+    - Title of the experiment
+    - Category (should check it's "PLD Deposition")
+    - Layer number - if present (PLD depositions)
+    - Deposition time - returns error if not present
+    - Repetition rate - returns error if not present
+    '''
+    # header = {
+    #     "Authorization": apikey,
+    #     "Content-Type": "application/json"
+    # }
+    sample_data = requests.get(
+        headers = header,
+        url = f"https://elabftw.fisica.unina.it/api/v2/items/{elabid}",
+        verify=True
+    ).json()
+    related_experiments = sample_data["related_experiments_links"]
+    result = []
+    for exp in related_experiments:
+        experiment_data = requests.get(
+            headers = header,
+            url = f"https://elabftw.fisica.unina.it/api/v2/experiments/{exp.get("entityid")}",
+            verify=True
+        ).json()
+        extra = experiment_data["metadata_decoded"]["extra_fields"]
+        result.append(
+            {"title": exp.get("title"),
+             "layer_number": extra.get("Layer Progressive Number").get("value"),
+             "category": exp.get("category_title"),
+             "deposition_time": extra.get("Duration").get("value"),
+             "repetition_rate": extra.get("Repetition rate").get("value")}
+        )
+    return result
+
+apikey = getpass("Paste API key here: ") # consider replacing with .env file
+header = Header(apikey)
+header = header.dump()
+result = get_sample_layers_data(1108) # edit id at will in case of deletion of remote source
+print(json.dumps(result))