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Python: Wrap a given string into a paragraph of given width

Python String: Exercise-82 with Solution

Write a Python program to wrap a given string into a paragraph of given width.

Sample Solution:-

Python Code:

import textwrap
s = input("Input a string: ")
w = int(input("Input the width of the paragraph: ").strip())
print("Result:")
print(textwrap.fill(s,w))

Sample Output:

Input a string:  The quick brown fox.
Input the width of the paragraph:  10
Result:
The quick
brown fox.

Flowchart:

Flowchart: Wrap a given string into a paragraph of given width.

Python Code Editor:

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Python: Tips of the Day

Check if a given key already exists in a dictionary:

In is the intended way to test for the existence of a key in a dict.

d = {"key1": 10, "key2": 23}

if "key1" in d:
    print("this will execute")

if "nonexistent key" in d:
    print("this will not")

If you wanted a default, you can always use dict.get():

d = dict()

for i in range(100):
    key = i % 10
    d[key] = d.get(key, 0) + 1

and if you wanted to always ensure a default value for any key you can either use dict.setdefault() repeatedly or defaultdict from the collections module, like so:

from collections import defaultdict

d = defaultdict(int)

for i in range(100):
    d[i % 10] += 1

but in general, the in keyword is the best way to do it.

Ref: https://bit.ly/2XPMRyz