$re = '/^from\s+
(?P<package_name>[.\w]+)\s+
import\s+
(\()?
(?(2)
(?P<object>[^()]+)\)
|
(?P<object2>(?:.+[\n\r]?)+)
)/mx';
$str = 'from .sql.base import (
SchemaVisitor
)
import os # ignore this import
from _pytest.config import (
main, UsageError, cmdline,
hookspec, hookimpl
)
I can capture this with:
syntax1 = re.compile(r\'^ *from (?P<package>[.\\w]+) +import +\\(?(?P<objects>[*, \\n\\w]+)\\)? *$\',
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';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
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 PHP, please visit: http://php.net/manual/en/ref.pcre.php