﻿ Python Math: Round a specified number upwards towards infinity and down towards negative infinity - w3resource # Python Math: Round a specified number upwards towards infinity and down towards negative infinity

## Python Math: Exercise-41 with Solution

Write a Python program to round a specified number upwards towards infinity and down towards negative infinity of precision 4.

Sample Solution:-

Python Code:

``````import decimal
context = decimal.getcontext()
value = decimal.Decimal(1) / decimal.Decimal(17)
print("1/17 = ",value)
context.prec = 4
print("Precision: ",4)

context.rounding = getattr(decimal, 'ROUND_CEILING')
value = decimal.Decimal(1) / decimal.Decimal(17)
print("Round upwards towards infinity: ",value)

context.rounding = getattr(decimal, 'ROUND_FLOOR')
value = decimal.Decimal(1) / decimal.Decimal(17)
print("Round down towards negative infinity: ",value)
```
```

Sample Output:

```1/17 =  0.05882352941176470588235294118
Precision:  4
Round upwards towards infinity:  0.05883
Round down towards negative infinity:  0.05882
```

Flowchart: Python Code Editor:

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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'
```