How To Split A String Using Regex In Python

In python, we can split a string using regular expression. Let us see how to split a string using regex in python.

We can use re.split() for the same. re is the module and split() is the inbuilt method in that module.

For example

import re
myvar = 'sky1cloud3blue333red'

print(re.split('\d+', myvar))

Note: Make sure to import the re module or else it will not work.

The output will be

['sky', 'cloud', 'blue', 'red']

See the output here

How to split a string using regex in python — split a string using regex in python

How to split a string by comma in python

We can split the string using comma as a separator in python.

Let’s see an example and see how it,s working

Example:

mystring = "Hey, I love Python, Python is easy"

x = mystring.split(",")

print(x)

The output will be

['Hey', ' I love Python', ' Python is easy']

See the output here

How to split a string using comma in python — split a string using comma in python

How to split a string by space in python

You can also split a string by using space as a separator in python.

By default the split() method uses space as a separator while splitting the string.

For example:

mystring = "sky blue red cloud"

x = mystring.split()

print(x)

The output will be

['sky', 'blue', 'red', 'cloud']

Example:

Split the string into a list

mystring = "sky blue red cloud"

x = mystring.split()

for temp in mystring:
    print(temp)

The output will be

s
k
y
 
b
l
u
e
 
r
e
d
 
c
l
o
u
d

See here the output

how to split the string using space as a separator — split the string using space as a separator

Check out Python string formatting.

How to split a string by delimiter in python

We can split the string by delimiter

Example:

myvar = 'I love python'

# This splits at space
print(myvar.split())

nature = 'sky, cloud, blue'

# This splits at ','
print(nature.split(','))

nature = 'sky:cloud:blue'

# This splits at ':'
print(nature.split(':'))

The output will be

['I', 'love', 'python']
['sky', ' cloud', ' blue']
['sky', 'cloud', 'blue']

See below for the output

How to split string using delimiter in Python — split string using delimiter in Python

How to split a string by every character in python

Let’s discuss here, how to split the string with array of character or list of character.

1- How to split a string into array of characters using for loop

We can split a string into array of characters using for loop.

Example:

def charactersplit(str):
  return [ch for ch in str]

mystr = 'I love python'

print(charactersplit(mystr))

Output will be

['I', ' ', 'l', 'o', 'v', 'e', ' ', 'p', 'y', 't', 'h', 'o', 'n']

See output here

How to split string into array of characters using for loop — split a string by every character in python

2- How to split string into array of characters by typecasting string to list

We can split a string into array of characters by typecasting string to list.

Example:

def charactersplit(str):
  return list(str)

mystr = 'I love python'

print(charactersplit(mystr))

Output will be

['I', ' ', 'l', 'o', 'v', 'e', ' ', 'p', 'y', 't', 'h', 'o', 'n']

See output here

How to split string into array of characters by typecasting string to list — split string into array of characters by typecasting string to list in Python

How to split a string by split function in python

We can split a string by split function in python.

For example:

mystring = "sky cloud  blue red"

x = mystring.split()

print(x)

Output will be

['sky', 'cloud', 'blue', 'red']

See output here

How to split a string by split function in python — split a string by split function in python

How to split a string by the last element in python

We can split the last element of a string in python. Let’s discuss on the same

1- How to split a string by the last element using rsplit()

We can use rsplit() function to split the last element of a string in python.

Example:

# initializing string
mystring = "sky, cloud,  blue, red"

# rsplit() to split the string
result = mystring.rsplit(', ', 1)

print(str(result))

The output will be

['sky, cloud,  blue', 'red']

See the output here

split a string by the last element in python

2- How to split a string by the last element using rpartition()

We can use rpartition() function to split the last element of a string in python.

Example:

# initializing string
mystring = "sky, cloud,  blue, red"

# rsplit() to split the string
result = mystring.rpartition(', ')

print(str(result))

Note: rpartition() will take only one argument or else it will show you an exception “TypeError: rpartition() takes exactly one argument (2 given)”

The output will be

('sky, cloud,  blue', ', ', 'red')

See the output here

How to split a string by the last element using partition() in python — Python split a string by the last element using rpartition()

How to split a string by multiple separators in python

We can use split() to split the string with one separator at a time in python.

If you want to use multiple separator to split the string we can use re.split() instead of split().

For Example

import re
myvar = 'sky,cloud;blue,   red'

print(re.split(r'[;,\s]\s*', myvar))

The output will be

['sky', 'cloud', 'blue', 'red']

See the output here

How to split a string by multiple separators in python — split a string by multiple separators in python

How to split a string by index in python

We can also split a string by index in python.

Example 1:

mystring = 'I love python It is easy to learn'
indices = [0,6,13]
x = [mystring[index:] for index in indices]
for mystring in x:
    print (mystring)

The output will be

I love python It is easy to learn
 python It is easy to learn
 It is easy to learn

How to split a string by indices in python — split a string by index in python

See the above output

Example 2:

mystring = 'I love python It is easy to learn'
indices = [0,6,13]
x = [mystring[i:j] for i,j in zip(indices, indices[1:]+[None])]
for mystring in x:
    print (mystring)

Output will be