﻿ Python: Check whether a given string is number or not using Lambda - w3resource

# Python: Check whether a given string is number or not using Lambda

## Python Lambda: Exercise-9 with Solution

Write a Python program to check whether a given string is number or not using Lambda.

Sample Solution:

Python Code :

``````is_num = lambda q: q.replace('.','',1).isdigit()
print(is_num('26587'))
print(is_num('4.2365'))
print(is_num('-12547'))
print(is_num('00'))
print(is_num('A001'))
print(is_num('001'))
print("\nPrint checking numbers:")
is_num1 = lambda r: is_num(r[1:]) if r[0]=='-' else is_num(r)
print(is_num1('-16.4'))
print(is_num1('-24587.11'))
``````

Sample Output:

```True
True
False
True
False
True

Print checking numbers:
True
True
```

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## Python: Tips of the Day

Returns a flat list of all the keys in a flat dictionary

Example:

```def tips_keys(flat_dict):
return list(flat_dict.keys())

ages = {
"Jack": 15,
"Owen": 21,
"Wyatt": 11,
}
print(tips_keys(ages))
```

Output:

```['Jack', 'Owen', 'Wyatt']
```