Java Package Declaration in PY
Match Java `package com.example.app;` declarations and capture the dotted package path.
Try it in the PY tester →Pattern
regexPY
^\s*package\s+([a-z][\w]*(?:\.[a-z][\w]*)*)\s*; (flags: m)Python (re) code
pyPython
import re
pattern = re.compile(r"^\s*package\s+([a-z][\w]*(?:\.[a-z][\w]*)*)\s*;", re.MULTILINE)
input_text = "package com.example.app;"
for m in pattern.finditer(input_text):
print(m.group(0))Stdlib `re` module — no third-party dependency. Works on Python 3.6+.
How the pattern works
^\s* allows leading whitespace at line start (m flag enables per-line). package\s+ requires the keyword. ([a-z][\w]*(?:\.[a-z][\w]*)*) captures the package path: each segment must start with a lowercase letter (Java convention) and continue with word characters. \s*; matches the required terminating semicolon.
Examples
Input
package com.example.app;Matches
package com.example.app;
Input
package io.vendor.module.sub;Matches
package io.vendor.module.sub;
Input
// no packageNo match
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