package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?m)^from\s+
(?P<package_name>[.\w]+)\s+
import\s+
(\()?
(?(2)
(?P<object>[^()]+)\)
|
(?P<object2>(?:.+[\n\r]?)+)
)`)
var 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`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
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 Golang, please visit: https://golang.org/pkg/regexp/