using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^from\s+
(?P<package_name>[.\w]+)\s+
import\s+
(\()?
(?(2)
(?P<object>[^()]+)\)
|
(?P<object2>(?:.+[\n\r]?)+)
)";
string input = @"from .sql.base import (
SchemaVisitor
)
import os # ignore this import
from _pytest.config import (
main, UsageError, cmdline,
hookspec, hookimpl
)
I can capture this with:
syntax1 = re.compile(r'^ *from (?P<package>[.\w]+) +import +\(?(?P<objects>[*, \n\w]+)\)? *$',
flags=re.MULTILINE)
Syntax #2 uses line continutation (if needed), and technically has no newlines within the import statement:
from pandas import Series
from .solvers import solve, solve_linear_system, solve_linear_system_LU, \
solve_undetermined_coeffs, nsolve, solve_linear, checksol, \
det_quick, inv_quick, check_assumptions
from .ode import checkodesol, classify_ode, dsolve, \
homogeneous_order";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx