CODEWITHSUNDEEP
pythonstringpython-3.xfind
XXXX
XXXX

Reputation: 247

print found characters inside a string

Straight to the point: I am wanting to print every instance of these characters in a string. For example:

#Pseudocode below
animals = 'cat dog fish goat pig'
if 'abcd' in animals,
print(instanceOfIt)

would spit out
cada
*letters in cat, dog and goat
How would I accomplish this?

Upvotes: 0

Views: 31

Answers (1)

L3viathan
L3viathan

Reputation: 27283

If I understand you correctly:

animals = 'cat dog fish goat pig'
print(''.join(filter(lambda x: x in 'abcd', animals)))

filter takes a function and an iterable, and returns a new iterable that contains only those elements for which the function returned something truthy.

A lambda expression is like an inline function, it would be equivalent to writing myfunction there and defining it earlier like this:

def myfunction(x):
    return x in 'abcd'

print(''.join(filter(myfunction, animals)))

Alternatively (thanks, Peter Wood):

print(''.join(filter('abcd'.__contains__, animals)))

Upvotes: 1

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