Issue10 - comprehension expressions

group.py

@@ -2,4 +2,77 @@
 
 # Your code to go here...
 
-my_group =
+import json
+
+my_group = {
+
+"Jill" : 
+
+{'job': 'Biologist' ,
+'age': '26', 
+'relations': {'Zalika': 'friend', 'John': 'Partner'}},
+
+"Zalika" : 
+
+{'job': 'artist' ,
+'age': '28', 
+'relations': {'Jill': 'friend'}},
+
+"John" : 
+
+{'job': 'writer' ,
+'age': '27', 
+'relations': {'Jill': 'Partner'}},
+
+"Nash" : 
+
+{'job': 'chef' ,
+'age': '34', 
+'relations': {'Zalika': 'landlord', 'John': 'cousin'}},
+
+"Richard" :
+
+{'job': 'writer' ,
+'age': '53', 
+'relations': {}}
+
+
+}
+
+
+#some examples of how to retreive info from dict
+print(f"Zalika's age is: {my_group['Zalika']['age']}")
+print(f"Nash's job is: {my_group['Nash']['job']}")
+print(f"Relationship between Jill and John is: {my_group['Jill']['relations']['John']}")
+
+#return max age of group
+ages = [my_group[i]['age'] for i in my_group.keys()]
+print(f"The maximum age of this group of people is: {max(ages)}") 
+
+#return mean number of relations in group
+rels = [len(my_group[i]['relations']) for i in my_group.keys()]
+print(f"The mean number of relations in this group of people is: {sum(rels)/len(rels)}")
+
+#return max age of group that have at least one relation
+ages_rels = [my_group[i]['age'] for i in my_group.keys() if len(my_group[i]['relations']) >= 1]
+print(f"The maximum age of people in this group that have at lease one relation is: {max(ages_rels)}") 
+
+#return max age of group that have at least one friend
+ages_friends = [my_group[i]['age'] for i in my_group.keys() if 'friend' in my_group[i]['relations'].values()]
+print(f"The maximum age of people in this group that have at lease one friend is: {max(ages_friends)}")
+
+
+
+#JSON
+
+#write
+with open('groupdata.json' ,'w') as jsonfile:
+    json.dump(my_group, jsonfile, indent=3)
+
+#load
+with open('groupdata.json' ,'r') as loadedjsonfile:
+    json.load(loadedjsonfile)
+print(loadedjsonfile)
+
+
+

groupdata.json

@@ -0,0 +1,37 @@
+{
+   "Jill": {
+      "job": "Biologist",
+      "age": "26",
+      "relations": {
+         "Zalika": "friend",
+         "John": "Partner"
+      }
+   },
+   "Zalika": {
+      "job": "artist",
+      "age": "28",
+      "relations": {
+         "Jill": "friend"
+      }
+   },
+   "John": {
+      "job": "writer",
+      "age": "27",
+      "relations": {
+         "Jill": "Partner"
+      }
+   },
+   "Nash": {
+      "job": "chef",
+      "age": "34",
+      "relations": {
+         "Zalika": "landlord",
+         "John": "cousin"
+      }
+   },
+   "Richard": {
+      "job": "writer",
+      "age": "53",
+      "relations": {}
+   }
+}