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Python: Get a single string from two given strings, separated by a space and swap the first two characters of each string

Python String: Exercise-5 with Solution

Write a Python program to get a single string from two given strings, separated by a space and swap the first two characters of each string.

Python String Exercises: Get a single string from two given strings, separated by a space and swap the first two characters of each string

Sample Solution:-

Python Code:

def chars_mix_up(a, b):
  new_a = b[:2] + a[2:]
  new_b = a[:2] + b[2:]

  return new_a + ' ' + new_b
print(chars_mix_up('abc', 'xyz'))

Sample Output:

xyc abz

Flowchart:

Flowchart: Program to get a single string from two given strings, separated by a space and swap the first two characters of each string

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Python Code Editor:

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Previous: Write a Python program to get a string from a given string where all occurrences of its first char have been changed to '$', except the first char itself.
Next: Write a Python program to add 'ing' at the end of a given string (length should be at least 3). If the given string already ends with 'ing' then add 'ly' instead. If the string length of the given string is less than 3, leave it unchanged.

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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