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Python: Create two strings from a given string

Python String: Exercise-68 with Solution

Write a Python program to create two strings from a given string. Create the first string using those character which occurs only once and create the second string which consists of multi-time occurring characters in the said string.

Sample Solution:-

Python Code:

from collections import Counter  
def generateStrings(input): 
     str_char_ctr = Counter(input) 
     part1 = [ key for (key,count) in str_char_ctr.items() if count==1] 
     part2 = [ key for (key,count) in str_char_ctr.items() if count>1] 
     part1.sort() 
     part2.sort()
     return part1,part2
input = "aabbcceffgh"
s1, s2 = generateStrings(input)
print(''.join(s1))   
print(''.join(s2))

Sample Output:

egh
abcf

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Python String: Create two strings from a given string.

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Flowchart: Create two strings from a given string

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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