Ripetizioni

Espressioni regolari in Python

Maria Eugenia Inzaugarat

Data Science

Caratteri ripetuti

Convalida la stringa seguente:

Convalida la stringa seguente:

Convalida la stringa seguente:

Convalida la stringa seguente:

import re
password = "password1234"

re.search(r"\w\w\w\w\w\w\w\w\d\d\d\d", password)

<re.Match object; span=(0, 12), match='password1234'>

Convalida la stringa seguente:

import re
password = "password1234"

re.search(r"\w{8}\d{4}", password)

<re.Match object; span=(0, 12), match='password1234'>

Quantificatori:

Un metacarattere che indica al motore regex quante volte abbinare il carattere immediatamente a sinistra.

text = "Date of start: 4-3. Date of registration: 10-04."

re.findall(r"       ", text)

text = "Date of start: 4-3. Date of registration: 10-04."

re.findall(r"\d+-   ", text)

text = "Date of start: 4-3. Date of registration: 10-04."

re.findall(r"\d+-\d+", text)

['4-3', '10-04']

my_string = "The concert was amazing! @ameli!a @joh&&n @mary90"

re.findall(r"@\w+\W*\w+", my_string)

['@ameli!a', '@joh&&n', '@mary90']

text = "The color of this image is amazing. However, the colour blue could be brighter."

re.findall(r"colou?r", text)

['color', 'colour']

phone_number = "John: 1-966-847-3131 Michelle: 54-908-42-42424"

re.findall(r"                          ", phone_number)

phone_number = "John: 1-966-847-3131 Michelle: 54-908-42-42424"

re.findall(r"\d{1,2}-                 ", phone_number)

phone_number = "John: 1-966-847-3131 Michelle: 54-908-42-42424"

re.findall(r"\d{1,2}-\d{3}-           ", phone_number)

phone_number = "John: 1-966-847-3131 Michelle: 54-908-42-42424"

re.findall(r"\d{1,2}-\d{3}-\d{2,3}-\d{4,}", phone_number)

['1-966-847-3131', '54-908-42-42424']

Espressioni regolari in Python