Regex pattern starting with capital letters and ending in optional '#'followed by digits-CodePudding

I've been trying to get a regex that matches a string starting with Capital letters [A-Z], optionally including zero or more of these characters(''#', '-', '/' or ' ') and optionally ending with '#' followed by digits:

Example of string: GRAND-CONCOURSE S/T #95

CodePudding user response：

How about this?

r"^[A-Z][-A-Z#/ ]*(?:#\d )?$"

CodePudding user response：

I provided a code with sample examples. I used re to check if the input is matched with a pattern or not, as follows:

import re

examples = [
    'GRAND-CONCOURSE S/T #95',
    'GRAND-CONCOURSE S/T',
    'GrandCONCOURSES/T',
    'GrandCONCOURSES/T#95',
    'G',
    'g',
    'grand-CONCOURSE S/T #95',
    'grand-CONCOURSE S/T',
]

# starts with capital letter(s) and several characters can be located after the capital letter(s) (or not).
p = re.compile('^[A-Z] [0-9#-/ ]*')
for example in examples:
    matched = p.match(example)
    if matched:
        print(True, example)
    else:
        print(False, example)

# RESULT
True 'GRAND-CONCOURSE S/T #95'
True 'GRAND-CONCOURSE S/T'
True 'GrandCONCOURSES/T'
True 'GrandCONCOURSES/T#95'
True 'G'
False 'g'
False 'grand-CONCOURSE S/T #95'
False 'grand-CONCOURSE S/T'

My code might be missing some patterns, so it would be helpful if you provide more examples.