﻿ Python Math: Distance between two points using latitude and longitude - w3resource # Python Math: Distance between two points using latitude and longitude

## Python Math: Exercise-27 with Solution

Write a Python program to calculate distance between two points using latitude and longitude.

Sample Solution:-

Python Code:

``````from math import radians, sin, cos, acos

print("Input coordinates of two points:")

dist = 6371.01 * acos(sin(slat)*sin(elat) + cos(slat)*cos(elat)*cos(slon - elon))
print("The distance is %.2fkm." % dist)
```
```

Sample Output:

```Input coordinates of two points:
Starting latitude: 23.5
Ending longitude: 67.5
Starting latitude: 25.5
Ending longitude: 69.5
The distance is 300.67km.
```

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## Python: Tips of the Day

Python: Get the Key Whose Value Is Maximal in a Dictionary

```>>> model_scores = {'model_a': 100, 'model_z': 198, 'model_t': 150}
>>> # workaround
>>> keys, values = list(model_scores.keys()), list(model_scores.values())
>>> keys[values.index(max(values))]
'model_z'
>>> # one-line
>>> max(model_scores, key=model_scores.get)
'model_z'
```