(a) Write a function named getShortestPath (graph, from, to) that takes a graph as an input and estimates the shortest distance between a node "from" to a node "to". Example 1: Input Graph: Adjacency list of the following graph. 5 A B 3 10 E D 9. 8. 2 F G 10 From: A To: G Output [(А, В), (В, С), (С, G)] That is, the output shows that the shortest path to reach "G" from "A" is through the nodes B and C.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Python 3 code required. Need solutions for part (a) and (b)

Please do not use classes!

Exercise # 1: Dijkstra’s Algorithm
(a) Write a function named getShortestPath (graph, from, to) that takes a graph as
an input and estimates the shortest distance between a node "from" to a node
“to".
Example 1:
Input
Graph: Adjacency list of the following graph.
6.
6.
10
E
8
2
F
10
From: A
To: G
Output
[(A, B), (B, C), (C, G)]
That is, the output shows that the shortest path to reach “G" from "A"
is through the nodes B and C.
(b)You are given a CSV file that contains a list of different cities in northern areas of Pakistan
and their distances. Not all of the cities are directly connected which is represented by
-1 in the distance matrix.
i.Load the given dataset in the form of a graph (adjacency list)
ii.Estimate the shortest distance between Islamabad and Kaghan.
Csv file:
Islamabad Taxila Murree Nathiagali Abbottabad Mansehra Balakot Kaghan Naran Chilas
Bisham Gilgit Hunza Khunjerab Pass Malam Jabba Skardu Muzaff
Islamabad
46
49
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
Taxila
46
-1
-1
74
-1
-1
-1
-1
-1
-1
-1
-1
-1
254
-1
-1
Murree
49
-1
36
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
68
Nathiagali
36
34
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
Abbottabad
-1
74
-1
34
23
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
Mansehra
-1
-1
-1
-1
23
37
-1
-1
-1
113
-1
-1
-1
-1
-1
-1
Balakot
-1
-1
-1
-1
-1
37
59
-1
-1
136
-1
-1
-1
-1
-1
-1
Kaghan
-1
-1
-1
-1
-1
-1
59
22
-1
-1
-1
-1
-1
-1
-1
-1
Naran
-1
-1
-1
-1
-1
-1
-1
22
113
-1
-1
-1
-1
-1
-1
-1
Chilas
-1
-1
-1
-1
-1
-1
-1
-1
113
199
133
306
-1
-1
-1
-1
Bisham
-1
-1
-1
-1
-1
113
136
-1
-1
199
-1
-1
-1
61
-1
-1
Gilgit
-1
-1
-1
-1
-1
-1
-1
-1
-1
133
-1
186
-1
-1
208
-1
Hunza
-1
-1
-1
-1
-1
-1
-1
-1
-1
306
-1
186
151
-1
381
-1
Khunjerab Pass -1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
151
-1
-1
-1
Malam Jabba
-1
254
-1
-1
-1
-1
-1
-1
-1
-1
61
-1
-1
-1
-1
-1
Skardu
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
208
381
-1
-1
484
Muzaffarabad
-1
-1
68
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
484
Transcribed Image Text:Exercise # 1: Dijkstra’s Algorithm (a) Write a function named getShortestPath (graph, from, to) that takes a graph as an input and estimates the shortest distance between a node "from" to a node “to". Example 1: Input Graph: Adjacency list of the following graph. 6. 6. 10 E 8 2 F 10 From: A To: G Output [(A, B), (B, C), (C, G)] That is, the output shows that the shortest path to reach “G" from "A" is through the nodes B and C. (b)You are given a CSV file that contains a list of different cities in northern areas of Pakistan and their distances. Not all of the cities are directly connected which is represented by -1 in the distance matrix. i.Load the given dataset in the form of a graph (adjacency list) ii.Estimate the shortest distance between Islamabad and Kaghan. Csv file: Islamabad Taxila Murree Nathiagali Abbottabad Mansehra Balakot Kaghan Naran Chilas Bisham Gilgit Hunza Khunjerab Pass Malam Jabba Skardu Muzaff Islamabad 46 49 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 Taxila 46 -1 -1 74 -1 -1 -1 -1 -1 -1 -1 -1 -1 254 -1 -1 Murree 49 -1 36 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 68 Nathiagali 36 34 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 Abbottabad -1 74 -1 34 23 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 Mansehra -1 -1 -1 -1 23 37 -1 -1 -1 113 -1 -1 -1 -1 -1 -1 Balakot -1 -1 -1 -1 -1 37 59 -1 -1 136 -1 -1 -1 -1 -1 -1 Kaghan -1 -1 -1 -1 -1 -1 59 22 -1 -1 -1 -1 -1 -1 -1 -1 Naran -1 -1 -1 -1 -1 -1 -1 22 113 -1 -1 -1 -1 -1 -1 -1 Chilas -1 -1 -1 -1 -1 -1 -1 -1 113 199 133 306 -1 -1 -1 -1 Bisham -1 -1 -1 -1 -1 113 136 -1 -1 199 -1 -1 -1 61 -1 -1 Gilgit -1 -1 -1 -1 -1 -1 -1 -1 -1 133 -1 186 -1 -1 208 -1 Hunza -1 -1 -1 -1 -1 -1 -1 -1 -1 306 -1 186 151 -1 381 -1 Khunjerab Pass -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 151 -1 -1 -1 Malam Jabba -1 254 -1 -1 -1 -1 -1 -1 -1 -1 61 -1 -1 -1 -1 -1 Skardu -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 208 381 -1 -1 484 Muzaffarabad -1 -1 68 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 484
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