RegEX to extract Variables names, operators, and quoted strings with symbols - python-3.x

Question

I'm trying to break a string (from command line argument) into 4 components. (C++ variable name):(python variable)(operator)(value or quoted string)
Example:
CVariable_1:PythonVariable.attribute<=2343.23
result=('CVariable_1','PythonVariable.attribute','<=','2343.23')
CVariable_2:PythonVariable2.attribute2.value<="Any string including SYMBOLS~!##$%^&*\"\'<> and spaces"
result=('CVariable_2','PythonVariable2.attribute2.value','==','Any string including SYMBOLS##$%\"\'<> and spaces')
The closest regex I've come up with is:
[^:'"<>=]+|[\.\w]+|[<>!=]+
But the string could have any symbols in it. Quotes would be escaped though.

Answer 1

I think ([^:]+(?=:))?([^<=!]+)([<>=!]+)(.*$) will work.
I tried the following code:
import re
import typing
pattern = re.compile(r"([^:]+(?=:))?([^<=!]+)([<>=!]+)(.*$)")
def split_name(name: str) -> typing.Tuple[str, str, str, str]:
global pattern
match = re.match(pattern, name)
if match is None:
raise ValueError("The name is invalid")
cname = match.group(1)
pyname = match.group(2)
operator = match.group(3)
value = match.group(4)
return cname, pyname, operator, value
test_names = ["PythonVariable1.attribute.value==False",
"CVariable_2:PythonVariable2.attribute<=2343.23",
"CVariable_3:PythonVariable3.attribute3.value<=\"Any string including SYMBOLS~!##$%^&*\\\"\\'<> and spaces\""]
print(list(map(split_name, test_names)))
If you want to write the allowed operators explicitly, you can change the third group. Note that the order is important in this case (<= needs to come before <):
([^:]+(?=:))?([^<=!]+)(<=|>=|!=|==|<|>)(.*$)