exercise in json

group.py

@@ -1,5 +1,90 @@
 """An example of how to represent a group of acquaintances in Python."""
+import json
 
-# Your code to go here...
+my_group = {
+    "Jill": {
+        "age": 26,
+        "job": "biologist",
+        "relations": {
+            "Zalika": "friend",
+            "John": "partner"
+        }
+    },
+    "Zalika": {
+        "age": 28,
+        "job": "artist",
+        "relations": {
+            "Jill": "friend"
+        }
+    },
+    "John": {
+        "age": 27,
+        "job": "writer",
+        "relations": {
+            "Jill": "partner"
+        }
+    },
+    "Nash": {
+        "age": 34,
+        "job": "chef",
+        "relations": {
+            "John": "cousin",
+            "Zalika": "landlord"
+        }
+    }
+}
 
-my_group =
+#the maximum age of people in the group
+
+max_age_group = []
+
+for groupname,groupinfo in my_group.items():
+    max_age_group.append(groupinfo['age'])
+
+print('1- Maximum age of people in group is: ', end="")
+print(max(max_age_group))
+
+#the average (mean) number of relations among members of the group
+
+ave_relation_group = []
+
+for groupname,groupinfo in my_group.items():
+    relation_nb = len(groupinfo['relations'].values())
+    ave_relation_group.append(relation_nb)
+
+print('2- Average (mean) number of relations among members of the group is: ', end="")
+print(max(ave_relation_group))
+
+# the maximum age of people in the group that have at least one relation
+
+max_age_one_relation = []
+
+for groupname,groupinfo in my_group.items():
+    if len(groupinfo['relations'].values()) >= 1:
+        max_age_one_relation.append(groupinfo['age'])
+
+print('3- Maximum age of people in the group that have at least one relation is: ', end="")
+print(max(max_age_one_relation))
+
+
+# [more advanced] the maximum age of people in the group that have at least one friend
+
+max_age_one_friend = []
+
+for groupname,groupinfo in my_group.items():
+    for relation in groupinfo['relations'].values() :
+        if relation == 'friend':
+            max_age_one_friend.append(groupinfo['age'])
+
+print('4- Maximum age of people in the group that have at least one friend is: ', end="")
+print(max(max_age_one_friend))
+
+#Reading and writing structured data files
+filename = 'my_group.json'
+with open(filename,'w') as f:
+    json.dump(my_group, f)
+
+with open(filename) as f:
+    group_info = json.load(f)
+
+print(group_info)

my_group.json

@@ -0,0 +1 @@
+{"Jill": {"age": 26, "job": "biologist", "relations": {"Zalika": "friend", "John": "partner"}}, "Zalika": {"age": 28, "job": "artist", "relations": {"Jill": "friend"}}, "John": {"age": 27, "job": "writer", "relations": {"Jill": "partner"}}, "Nash": {"age": 34, "job": "chef", "relations": {"John": "cousin", "Zalika": "landlord"}}}