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
#HawkerHeritage📢 Originally the Seng Poh Road Market in 1951, Tiong Bahru Market served as a bustling centre for the community. Next time you’re there for a meal, don’t forget to soak up the history & nostalgia!
#OurHawkerCulture#OurHawkerCentres
#HawkerHeritage Fancy A Feast in a Garden 🌴? Since 1971, Newton Food Centre hawker has been serving up Singapore’s culinary diversity with its unique 'garden city' charm. Forward this post to someone who’ll appreciate this picturesque setting!
#OurHawkerCulture#OurHawkerCentres#HawkerHeritage
#HawkerHeritage📜 Tekka Centre: Let’s time-travel back to 1915, where 'Kandang Kerbau' and ‘Tekka’ tell tales of cattle and wild bamboo. What a journey for the senses!
#OurHawkerCulture#OurHawkerCentres
#HawkerHeritage🌟 People’s Park Food Centre: A Culinary Heritage Site 🌟 Starting as a hawker shelter in 1923 and evolving into the largest market by 1940, it's a place where history and cuisine meet. Share this with someone that you’ll like to explore this iconic food haven with!
#OurHawkerCulture#OurHawkerCentres
#HawkerHeritage🍲✨ Experience a rich blend of history and culinary excellence at Singapore's largest hawker centre: Chinatown Complex Market! Established in 1981 for the last of Chinatown’s street hawkers, it's now a vibrant gastronomic haven with around 700 stalls. Share this with your favourite foodies!
#OurHawkerCulture#OurHawkerCentres
#HawkerHeritage Changi Village Hawker Centre: From a military past to a seaside food haunt 🌴#DidYouKnow This dining spot was part of Changi's transformation into a resort? An idyllic memory to savour with your favourite hawker delights!
#OurHawkerCulture#OurHawkerCentres
#HawkerHeritage Architectural elegance meets culinary delight at Old Airport Road Food Centre 🍴🏛️#DidYouKnow that its modern structure was designed in '73 to match the housing estates in the area?
#OurHawkerCulture#OurHawkerCentres
#HawkerHeritage#DidYouKnow Adam Road Food Centre is nine-sided and almost circular? This popular spot is famous for its nasi lemak and a variety of delightful treats! This is your sign to organise that makan trip🍴
#OurHawkerCulture#OurHawkerCentres
❤️#HawkerHeritage❤️#DidYouKnow that Maxwell Food Centre was once a wet market? It was also one of the places where the poor and displaced could find cheap meals after WWII. Today, it’s a treasure trove of local delights!
#OurHawkerCulture#OurHawkerCentres