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Break up String Empty Separator – Finxter

Abstract: You possibly can break up a string utilizing an empty separator utilizing –
(i) listing constructor
(ii) map+lambda
(iii) regex
(iv) listing comprehension

Minimal Instance:

textual content="12345"

# Utilizing listing()
print(listing(textual content))

# Utilizing map+lambda
print(listing(map(lambda c: c, textual content)))

# Utilizing listing comprehension
print([x for x in text])

# Utilizing regex
import re
# Strategy 1
print([x for x in re.split('', text) if x != ''])
# Strategy 2
print(re.findall('.', textual content))

Drawback Formulation

📜Drawback: Find out how to break up a string utilizing an empty string as a separator?

Instance: Think about the next snippet –

print(a.break up(''))


Traceback (most up-to-date name final):
  File "C:UsersSHUBHAM", line 2, in <module>
    a.break up('')
ValueError: empty separator

Anticipated Output:

['a', 'b', 'c', 'd']

So, this basically signifies that once you attempt to break up a string through the use of an empty string because the separator, you’ll get a ValueError. Thus, your process is to learn how to get rid of this error and break up the string in a method such that every character of the string is individually saved as an merchandise in a listing.

Now that we’ve a transparent image of the issue allow us to dive into the options to resolve the issue.

Methodology 1: Use listing()

Strategy: Use the listing() constructor and go the given string as an argument inside it because the enter, which is able to break up the string into separate characters.

Notice: listing() creates a brand new listing object that incorporates objects obtained by iterating over the enter iterable. Since a string is an iterable shaped by combining a gaggle of characters, therefore, iterating over it utilizing the listing constructor yields a single character at every iteration which represents particular person objects within the newly shaped listing.



# ['a', 'b', 'c', 'd']

🌎Associated Learn: Python listing() — A Easy Information with Video

Strategy: Use the map() to execute a sure lambda perform on the given string. All you want to do is to create a lambda perform that merely returns the character handed to it because the enter to the map object. That’s it! Nevertheless, the map methodology will return a map object, so you should convert it to a listing utilizing the listing() perform.


print(listing(map(lambda c: c, a)))

# ['a', 'b', 'c', 'd']

Strategy: Use a listing comprehension that returns a brand new listing containing every character of the given string as particular person objects.


print([x for x in a])
# ['a', 'b', 'c', 'd']

🌎Associated Learn: Listing Comprehension in Python — A Useful Illustrated Information

Methodology 4: Utilizing regex

The re.findall(sample, string) methodology scans string from left to proper, trying to find all non-overlapping matches of the sample. It returns a listing of strings within the matching order when scanning the string from left to proper.

🌎Associated Learn: Python re.findall() – All the pieces You Must Know

Strategy: Use the common expression re.findall('.',a) that finds all characters within the given string ‘a‘ and stires them in a listing as particular person objects.


import re

# ['a', 'b', 'c', 'd']

Alternatively, it’s also possible to use the break up methodology of the regex library in a listing comprehension which returns every character of the string and eliminates empty strings.


import re
print([x for x in re.split('',a) if x!=''])

# ['a', 'b', 'c', 'd']

🌎Associated Learn: Python Regex Break up

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Hurrah! We now have efficiently solved the given drawback utilizing as many as 4 (5, to be trustworthy) alternative ways. I hope this article helped you and answered your queries. Please subscribe and keep tuned for extra fascinating articles and options sooner or later.

Joyful coding! 🙂

Regex Humor

Wait, forgot to flee an area. Wheeeeee[taptaptap]eeeeee. (supply)



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