# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r'''
(?:^|(?<=\s)) # delimitador inicial
(?:[+-]?\d+e[+-]?\d+| # exponenciales puros
[+-]?\d+\.\d+|[+-]?\d+\.|[+-]?\.\d+) # punto flotante
(?:e[+-]?\d+)? # exponenciales de fracción
(?=\s) # delimitador de finalización
'''
test_str = ("Hace coincidir números decimales y exponenciales aislados para el sistema de numeración decimal. '\n"
"test: 22e22 22e+22 +22e22 +22e+22\n"
"22.22 22. .22\n"
"22.e22 22.e+22 22.22e22 22.22e+22 .22e22 .22e+22\n"
"88e 88e+ e88 e+88 88e88.")
matches = re.finditer(regex, test_str, re.VERBOSE | re.IGNORECASE)
for matchNum, match in enumerate(matches, start=1):
print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))
for groupNum in range(0, len(match.groups())):
groupNum = groupNum + 1
print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
# Note: for Python 2.7 compatibility, use ur'' to prefix the regex and u"" to prefix the test string and substitution.
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html