﻿ Python: Check whether any word in a given sting contains duplicate characrters or not - w3resource

# Python: Check whether any word in a given sting contains duplicate characrters or not

## Python String: Exercise-100 with Solution

Write a Python program to check whether any word in a given sting contains duplicate characrters or not. Return True or False.

Sample Solution-1:

Python Code:

``````def duplicate_letters(text):
word_list = text.split()
for word in word_list:
if len(word) > len(set(word)):
return False
return True
text = "Filter out the factorials of the said list."
print("Original text:")
print(text)
print("Check whether any word in the said sting contains duplicate characrters or not!")
print(duplicate_letters(text))
text = "Python Exercise."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characrters or not!")
print(duplicate_letters(text))
text = "The wait is over."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characrters or not!")
print(duplicate_letters(text))
```
```

Sample Output:

```Original text:
Filter out the factorials of the said list.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
Python Exercise.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
The wait is over.
Check whether any word in the said sting contains duplicate characrters or not!
True
```

Flowchart:

## Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Sample Solution-2:

Python Code:

``````def duplicate_letters(text):
return all(len(word) == len(set(word)) for word in text.split())

text = "Filter out the factorials of the said list."
print("Original text:")
print(text)
print("Check whether any word in the said sting contains duplicate characrters or not!")
print(duplicate_letters(text))
text = "Python Exercise."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characrters or not!")
print(duplicate_letters(text))
text = "The wait is over."
print("\nOriginal text:")
print(text)
print("Check whether any word in the said sting contains duplicate characrters or not!")
print(duplicate_letters(text))
```
```

Sample Output:

```Original text:
Filter out the factorials of the said list.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
Python Exercise.
Check whether any word in the said sting contains duplicate characrters or not!
False

Original text:
The wait is over.
Check whether any word in the said sting contains duplicate characrters or not!
True
```

Flowchart:

## Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

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