Небольшой трик с регулярными выражениями который редко вижу в чужом коде.
Допустим, вам нужно распарсить простой текст и вытащить оттуда пары имя+телефон. Вернуть всё это надо в виде списка словарей. Возьмем очень простой пример текста.
>>> text = '''
>>> Alex:8999123456
>>> Mike:+799987654
>>> Oleg:+344456789
>>> '''
Соответственно, для выделения нужных элементов будем использовать группы. Получится такой паттерн:
(\w+):([\d+]+)
Как мы будем формировать словарь из найденных групп?
>>> import re
>>> results = []
>>> for match in re.finditer(r"(\w+):([\d+]+)", text):
>>> results.append({
>>> "name": match.group(1),
>>> "phone": match.group(2)
>>> })
>>> print(results)
[{'name': 'Alex', 'phone': '8999123456'}, ...]
Можно немного сократить запись используя zip
>>> results = []
>>> for match in re.finditer(r"(\w+):([\d+]+)", text):
>>> results.append(dict(zip(['name', 'phone'], match.groups())))
Но есть способ лучше! Это именованные группы в regex. Можно в паттерне указать имя группы и результат сразу забрать в виде словаря.
>>> for match in re.finditer(r"(?P<name>\w+):(?P<phone>[\d+]+)", text):
>>> results.append(match.groupdict())
То есть всё что я сделал, это добавил в начале группы (внутри сбокочек) такую запись:
(?P<group-name>...)
Теперь найденная группа имеет имя и можно обратиться к ней как к элементу списка
>>> name = match['name']
Либо забрать сразу весь словарь методом groupdict()
>>> match.groupdict()
#tricks#regex
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The US government has revealed a list of items Americans should keep on hand in case of an emergency.
Officials warned that households should be prepared to survive on their own for several days if disaster strikes, with no immediate access to outside help.
The Department of Homeland Security recommends storing enough water, food, and medical supplies to sustain every person in a household during an extended emergency.
At the top of the list is water, at least one gallon per person per day, along with several days' worth of non-perishable food. Americans are also urged to keep critical safety items such as flashlights, radios, batteries, and first-aid kits readily available in a portable emergency supply kit.
Officials said the supplies should be stored in airtight containers and kept in easy-to-carry bins or bags in case families need to evacuate quickly.
The checklist also includes tools to signal for help, sanitation supplies, and equipment to shelter safely indoors if conditions outside become dangerous.
While the Trump administration has not urged Americans to stockpile large quantities of supplies, federal officials and preparedness experts recommend keeping essential items on hand in case of an emergency.
#Security#Emergency
👂More on Trump's Ear ⚠️
On January 19, 1966, Indira Gandhi became India’s first female Prime Minister after Lal Bahadur Shastri died. She led the Green Revolution to increase food production and imposed the Emergency in 1975, limiting freedoms. Her time in office had major changes and controversies.
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@googlefactss#IndiraGandhi#India#History#GreenRevolution#Emergency