# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"""
(
(\d+|pi|\\u03C0|\\u03A0|phi|\\u03C6|\\u03A6)
|
(abs|acos|cos|atan|tan|asin|sin|ceil|floor|sqrt|log|ln)\([^)]+\)
)
(
\s*([+\-*\/^]|mod)\s*
(
(\d+|pi|\\u03C0|\\u03A0|phi|\\u03C6|\\u03A6)
|
(abs|acos|cos|atan|tan|asin|sin|ceil|floor|sqrt|log|ln)\([^)]+\)
)
)*
\s*=
"""
test_str = ("test text (1) pi=\n"
"test text (1 pi=\n"
"test text 1) pi=\n"
"test text (2) pi + 10 / 20=\n"
"test text (3) test pi ^ 10 / 20=\n"
"test text (30) 10 + 5=\n"
"test text (500) abs(10 + 5)=\n"
"test text (1) pi + 10 / 20=\n"
"test text 10*5=\n"
"test text pi / phi=\n"
"test text 10 mod phi=\n"
"test text 50 10 mod phi=\n"
"test text pi mod abs(phi)=\n"
"apple banana cherry apple 10 apple cherry banana hi 10 99+1=\n")
matches = re.finditer(regex, test_str, re.VERBOSE)
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