from flask import Flask, request, jsonify
app = Flask(__name__)

def find_contact(email, contact_list):
    for item in contact_list:
        if item['email'] == email:
            return item

    return {}

@app.route('/contact/')
def contact_list():
    email = request.args.get('email')
    contacts = [
        {'nome':'Paula', 'email': 'contato@paula.com'},
        {'nome':'Vinicius', 'email': 'contato@vinicius.com'}
    ]
    if email == None:
        return jsonify(contacts)

    return jsonify(find_contact(email, contacts))


if __name__ == '__main__':
    app.run()