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Python: Create a string from two given strings concatenating uncommon characters of the said strings

Python String: Exercise-70 with Solution

Write a Python program to create a string from two given strings concatenating uncommon characters of the said strings.

Sample Solution:-

Python Code:

def uncommon_chars_concat(s1, s2):   
     
     set1 = set(s1) 
     set2 = set(s2) 
  
     common_chars = list(set1 & set2) 
     result = [ch for ch in s1 if ch not in common_chars] + [ch for ch in s2 if ch not in common_chars] 
     return(''.join(result))

s1 = 'abcdpqr'
s2 = 'xyzabcd'
print("Original Substrings:\n",s1+"\n",s2)
print("\nAfter concatenating uncommon characters:")
print(uncommon_chars_concat(s1, s2))

Sample Output:

Original Substrings:
 abcdpqr
 xyzabcd

After concatenating uncommon characters:
pqrxyz

Pictorial Presentation:

Python String: Create a string from two given strings concatenating uncommon characters of the said strings.

Flowchart:

Flowchart: Create a string from two given strings concatenating uncommon characters of the said strings

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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