﻿ Python Math: Find the next previous palindrome of a specified number - w3resource # Python Math: Find the next previous palindrome of a specified number

## Python Math: Exercise-23 with Solution

Write a python program to find the next previous palindrome of a specified number.

A palindromic number or numeral palindrome is a number that remains the same when its digits are reversed. Like 15951, for example, it is "symmetrical". The term palindromic is derived from palindrome, which refers to a word (such as " REDIVIDER" or even "LIVE EVIL") whose spelling is unchanged when its letters are reversed.

Sample Solution:-

Python Code:

``````def Previous_Palindrome(num):
for x in range(num-1,0,-1):
if str(x) == str(x)[::-1]:
return x
print(Previous_Palindrome(99));
print(Previous_Palindrome(1221));
```
```

Sample Output:

```88
1111
```

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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'
```