Hướng dẫn split alphanumeric string python

I am trying to split and then join the first alphanumeric occurrence by space and keep other occurrences as it is, but not getting the pattern to do that. For ex: string: Johnson12 is at club39 converted_string: Jhonson 12 is at club39

Desired Output:

input = "Brijesh Tiwari810663 A14082014RGUBWA"

output = Brijesh Tiwari 810663 A14082014RGUBWA

Code:

import re
regex = re.compile["[0-9]{1,}"]
testString = "Brijesh Tiwari810663 A14082014RGUBWA" # fill this in
a = re.split['[[^a-zA-Z0-9]]', testString]
print[a]
>> ['Brijesh', ' ', 'Tiwari810663', ' ', 'A14082014RGUBWA']

asked Oct 12, 2021 at 7:16

0

Here is one way. We can use re.findall on the pattern [A-Za-z]+|[0-9]+, which will alternatively find all letter or all number words. Then, join that resulting list by space to get your output

inp = "Brijesh Tiwari810663 A14082014RGUBWA"
output = ' '.join[re.findall[r'[A-Za-z]+|[0-9]+', inp]]
print[output]  # Brijesh Tiwari 810663 A 14082014 RGUBWA

Edit: For your updated requirement, use re.sub with just one replacement:

inp = "Johnson12 is at club39"
output = re.sub[r'\b[[A-Za-z]+][[0-9]+]\b', r'\1 \2', inp, 1]
print[output]  # Johnson 12 is at club39

answered Oct 12, 2021 at 7:21

Tim BiegeleisenTim Biegeleisen

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Problem Formulation: Given a string of letters and numbers. How to split the string into substrings of either letters or numbers by using the boundary between a letter and a number and vice versa.

Nội dung chính

• Method 1: re.split[]
• Method 2: re.findall[]
• Method 3: itertools.groupby[]
• Related Video re.split[]
• Programmer Humor
• Where to Go From Here?
• How do you split a string between letters and digits?
• How do you split an alphanumeric string in Python?
• How do you split a string after a specific character in Python?
• How do I extract a string between two characters in Python?

Examples: Have a look at the following examples of what you want to accomplish.

'111A222B333C'     – ->    ['111', 'A', '222', 'B', '333', 'C']
'Finxter42'        – ->    ['Finxter', '42']
'Hello world'     – ->    ['Hello', ' world']

How to Split a String Between Numbers and Letters?

• Method 1: re.split[]
• Method 2: re.findall[]
• Method 3: itertools.groupby[]
• Related Video re.split[]
• Programmer Humor
• Where to Go From Here?

Method 1: re.split[]

The re.split[pattern, string] method matches all occurrences of the pattern in the string and divides the string along the matches resulting in a list of strings between the matches. For example, re.split['a', 'bbabbbab'] results in the list of strings ['bb', 'bbb', 'b'].

# Method 1: re.split[]
import re
s = '111A222B333C'
res = re.split['[\d+]', s]
print[res]
# ['', '111', 'A', '222', 'B', '333', ' C']

The \d special character matches any digit between 0 and 9. By using the maximal number of digits as a delimiter, you split along the digit-word boundary. Note that you don’t consume the split character by wrapping it into a matching group using the parentheses [...]. If you leave out the parentheses, it’ll consume the numbers and the result wouldn’t contain any consecutive numbers.

Method 2: re.findall[]

The re.findall[pattern, string] method scans string from left to right, searching for all non-overlapping matches of the pattern. It returns a list of strings in the matching order when scanning the string from left to right.

# Method 2: re.findall[]
import re
s = '111A222B333C'

res = re.findall['[\d+|[A-Za-z]+]', s]

print[res]
# ['111', 'A', '222', 'B', '333', 'C']

# Method 3: itertools.groupby[]
from itertools import groupby
s = '111A222B333C'

res = [''.join[g] for _, g in groupby[s, str.isalpha]]
print[res]
# ['111', 'A', '222', 'B', '333', 'C']

• The itertools.groupby[iterable, key=None] function creates an iterator that returns tuples [key, group-iterator] grouped by each value of key. We use the str.isalpha[] function as key function.
• The str.isalpha[] function returns True if the string consists only of alphabetic characters.

Python Regex Split - The Complete Guide

Programmer Humor

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There are 10 types of people in the world. Those who understand trinary, those who don’t, and those who mistake it for binary.

Where to Go From Here?

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How do you split a string between letters and digits?

Steps :.

Calculate the length of the string..

Scan every character[ch] of a string one by one. if [ch is a digit] then append it in res1 string. ... .

Print all the strings, we will have one string containing a numeric part, other non-numeric part, and the last one contains special characters..

How do you split an alphanumeric string in Python?

Split a string with delimiters in Python.

Using re. split[] function. A simple solution to split a string by the pattern's occurrences is using the built-in function re.split[] . The pattern can consist of one or more delimiters: ... .

Using re. findall[] function. Another alternative is to use the re..

How do you split a string after a specific character in Python?

Python String split[] Method Syntax separator : This is a delimiter. The string splits at this specified separator. If is not provided then any white space is a separator. maxsplit : It is a number, which tells us to split the string into maximum of provided number of times.

How do I extract a string between two characters in Python?

Extract substring between two markers using split[] method Next method that we will be using is the split[] method of Python Programming language, to extract a given substring between two markers. The split[] method in python splits the given string from a given separator and returns a list of splited substrings.