从 python 中给出的字符串中提取模式

Question

string_input = 'HijesProvincia:GuadalajaraUTM X:499.028CC.AA.:Comunidad Autónoma de Castilla-La ManchaUTM Y:4.567.841Huso:30Cota:1244 m.s.n.m.Tipo de punto:'

In this string I have to extract UTM X:499.028 and UTM Y:4.567.841 .

I want a generalized way to parse this format because the numbers will be of different length. But all the string inputs will be of similar structure.

Answer 1

Use regular expressions. Depending on whether the text in between is fixed or variable, you can insert it as is in your pattern, or use \.+ :

>>> import re

>>> p = re.compile('HijesProvincia:Guadalajara(UTM X:[0-9.]+).+(UTM Y:[0-9.]+)')
>>> m = p.search(string_input)
>>> m.groups()
('UTM X:499.028', 'UTM Y:4.567.841')

Note that I use [0-9.]+ instead of \d+ to match the number. I included the dot because the number of dots seems variable in your example.

Answer 2

You should detail the precise pattern that can appear and how much the string around it can change. But assuming you search for 'UTM X:' or 'UTM Y:' followed by a sequence of digits groups separated by a dot in a generic string you can use:

import re 
...
re.findall('(UTM [XY]:[\d.]+)', string_input)

that returns a list:

['UTM X:499.028', 'UTM Y:4.567.841']