﻿ Python: Find the common values that appear in two given strings - w3resource

Python: Find the common values that appear in two given strings

Python String: Exercise-87 with Solution

Write a Python program find the common values that appear in two given strings.

Sample Solution:-

Python Code:

``````def intersection_of_two_string(str1, str2):
result = ""
for ch in str1:
if ch in str2 and not ch in result:
result += ch
return result

str1 = 'Python3'
str2 = 'Python2.7'
print("Original strings:")
print(str1)
print(str2)
print("\nIntersection of two said String:")
print(intersection_of_two_string(str1, str2))
```
```

Sample Output:

```Original strings:
Python3
Python2.7

Intersection of two said String:
Python
```

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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