What is the regex for python import statement?

The regex pattern for python import statement is `^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$`. This pattern validates python import or from...import statement.

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$/;` and test with `regex.test(yourValue)`. It returns `true` if the value matches.

How do I use this regex in Python?

In Python, use `import re; re.match(r'^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$', value)`. The raw string prefix (`r`) prevents Python from interpreting backslashes as escape characters.

Is this regex case-sensitive?

By default, yes. To make it case-insensitive, add the `i` flag in JavaScript (`/^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$/i`) or use `re.IGNORECASE` in Python.

Regex for Python Import Statement

Regex Pattern

^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$

Python import or from...import statement

Quick Answer

The regex pattern for python import statement is `^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$`. Python import or from...import statement. This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
import os	✓ Matches
from os import path	✓ Matches
from datetime import datetime, timedelta	✓ Matches
require("os")	✗ No match
import	✗ No match
from import os	✗ No match

Code Examples

javascript

const regex = /^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$/;
const isValid = regex.test(value);

python

import re
pattern = r'^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^(?:from\s+[a-zA-Z_][a-zA-Z0-9_.]*\s+)?import\s+[a-zA-Z_][a-zA-Z0-9_.,\s]*$/', $value)) {
    echo "valid";
}

java

String pattern = "^(?:from\\s+[a-zA-Z_][a-zA-Z0-9_.]*\\s+)?import\\s+[a-zA-Z_][a-zA-Z0-9_.,\\s]*$";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

Related Regex Patterns

JavaScript Variable Name

Valid JavaScript variable/identifier name

Python Variable Name

Valid Python identifier name

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Valid CSS class name (starts with letter, underscore, or hyphen)

CSS ID Selector

CSS ID selector starting with #

JSON Key

JSON object key (quoted string followed by colon)

Semantic Version (Strict)

Strict semantic versioning (MAJOR.MINOR.PATCH)