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smac89/fpr.py

Last active May 10, 2020
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Floating point regex: A regular expression to match any valid python floating point value.
# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
# See it in action https://regex101.com/r/ObowxD/5
import re
regex = r"""
(?xm)
(?:\s|^)
([-+]*(?:\d+\.\d*|\.?\d+)(?:[eE][-+]?\d+)?)
(?=\s|$)
"""
test_str = ("0.2 2.1 3.1 ab 3 c abc23\n"
"4534.34534345\n"
".456456\n"
"1.\n"
"1e545\n"
"1.1e435ff\n"
".1e232\n"
"1.e343\n"
"1231ggg\n"
"112E+12\n"
"4\n"
"5545ggg\n"
"dfgdf.5444\n"
"12312.1231\n"
".1231\n"
"1231\n"
"1.wrr\n"
"1 34345 234 -121\n"
"177\n"
"-1e+ -1e+0 1e-1")
matches = re.finditer(regex, test_str)
for matchNum, match in enumerate(matches):
matchNum = matchNum + 1
print ("Match {matchNum} was found at {start}-{end}: {match}".format(
matchNum=matchNum,
start=match.start(),
end=match.end(),
match=repr(match.group())))
for groupNum in range(0, len(match.groups())):
groupNum = groupNum + 1
print ("\tGroup {groupNum} found at {start}-{end}: {group}".format(
groupNum=groupNum, start=match.start(groupNum), end=match.end(groupNum),
group=match.group(groupNum)))
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