v4: Drop support for EOL Python 2.6 and 3.0-3.3

.travis.yml

@@ -2,7 +2,6 @@ language: python
 sudo: false
 cache: pip
 python:
-- '2.6'
 - '2.7'
 - '3.4'
 - '3.5'
@@ -11,7 +10,6 @@ env:
   global:
     - CC_TEST_REPORTER_ID=$TRAVIS_CODE_CLIMATE_TOKEN
 install:
-- if [[ $TRAVIS_PYTHON_VERSION == 2.6* ]]; then pip install unittest2; fi
 - python setup.py install
 - pip install pyyaml
 - pip install flask
@@ -30,7 +28,7 @@ before_script:
 - chmod +x ./cc-test-reporter
 - ./cc-test-reporter before-build
 script:
-- if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then coverage run -m unittest2 discover; else coverage run -m unittest discover; fi
+- coverage run -m unittest discover
 after_script:
 - codecov
 - ./cc-test-reporter after-build --exit-code $?

CONTRIBUTING.md

@@ -70,7 +70,7 @@ You can use our Docker image to avoid setting up the development environment you
 
 ##### Prerequisites #####
 
-- Python 2.6 through 3.6
+- Python 2.7 and 3.4+
 - [python_http_client](https://github.com/sendgrid/python-http-client)
 
 ##### Initial setup: #####
@@ -122,12 +122,6 @@ All test files are in the [`test`](https://github.com/sendgrid/sendgrid-python/t
 
 For the purposes of contributing to this repo, please update the [`test_sendgrid.py`](https://github.com/sendgrid/sendgrid-python/tree/master/test/test_sendgrid.py) file with unit tests as you modify the code.
 
-For Python 2.6.*:
-
-`unit2 discover -v`
-
-For Python 2.7.* and up:
-
 `python -m unittest discover -v`
 
 ### Testing Multiple Versions of Python
@@ -149,7 +143,6 @@ You can install it by yourself in user dir by calling `source test/prism.sh`.
 Add ```eval "$(pyenv init -)"``` to your shell environment (.profile, .bashrc, etc) after installing tox, you only need to do this once.
 
 ```
-pyenv install 2.6.9
 pyenv install 2.7.11
 pyenv install 3.4.3
 pyenv install 3.5.0
@@ -159,7 +152,7 @@ Make sure to change the current working directory to your local version of the r
 python setup.py install
 ```
 ```
-pyenv local 3.5.0 3.4.3 2.7.11 2.6.9
+pyenv local 3.5.0 3.4.3 2.7.11
 pyenv rehash
 ```
 

README.md

@@ -42,7 +42,7 @@ We appreciate your continued support, thank you!
 
 ## Prerequisites
 
-- Python version 2.6, 2.7, 3.4, 3.5 or 3.6
+- Python version 2.7 and 3.4+
 - The SendGrid service, starting at the [free level](https://sendgrid.com/free?source=sendgrid-python)
 
 ## Setup Environment Variables

docker/Dockerfile

@@ -1,5 +1,5 @@
 FROM ubuntu:xenial
-ENV PYTHON_VERSIONS='python2.6 python2.7 python3.4 python3.5 python3.6' \
+ENV PYTHON_VERSIONS='python2.7 python3.4 python3.5 python3.6' \
     OAI_SPEC_URL="https://raw.githubusercontent.com/sendgrid/sendgrid-oai/master/oai_stoplight.json"
 
 # install testing versions of python, including old versions, from deadsnakes

sendgrid/helpers/inbound/send.py

@@ -37,6 +37,7 @@ def url(self):
         """URL to send to."""
         return self._url
 
+
 def main():
     config = Config()
     parser = argparse.ArgumentParser(description='Test data and optional host.')
@@ -54,5 +55,6 @@ def main():
     print(response.headers)
     print(response.body)
 
+
 if __name__ == '__main__':
-    main()
+    main()

sendgrid/helpers/mail/content.py

@@ -1,5 +1,6 @@
 from .validators import ValidateAPIKey
 
+
 class Content(object):
     """Content to be included in your email.
 

sendgrid/helpers/mail/exceptions.py

@@ -2,6 +2,7 @@
 # Various types of extensible SendGrid related exceptions
 ################################################################
 
+
 class SendGridException(Exception):
     """Wrapper/default SendGrid-related exception"""
     pass
@@ -14,9 +15,8 @@ class APIKeyIncludedException(SendGridException):
             message -- explanation of the error
     """
 
-    def __init__(self, 
-                 expression="Email body", 
+    def __init__(self,
+                 expression="Email body",
                  message="SendGrid API Key detected"):
         self.expression = expression
         self.message = message
-

sendgrid/helpers/mail/from_email.py

@@ -1,4 +1,5 @@
 from .email import Email
 
+
 class From(Email):
-    """A from email address with an optional name."""
+    """A from email address with an optional name."""

sendgrid/helpers/mail/html_content.py

@@ -1,6 +1,7 @@
 from .content import Content
 from .validators import ValidateAPIKey
 
+
 class HtmlContent(Content):
     """HTML content to be included in your email."""
 

sendgrid/helpers/mail/mail.py

@@ -2,6 +2,7 @@
 from .personalization import Personalization
 from .header import Header
 
+
 class Mail(object):
     """Creates the response body for v3/mail/send"""
     def __init__(
@@ -26,9 +27,9 @@ def __init__(
 
         # Minimum required to send a single email
         if from_email:
-            self.from_email = from_email    
+            self.from_email = from_email
         if subject:
-            self.subject = subject    
+            self.subject = subject
         if to_email:
             personalization = Personalization()
             personalization.add_to(to_email)
@@ -51,7 +52,7 @@ def _ensure_insert(self, new_items, insert_to):
 
     def _flatten_dicts(self, dicts):
         list_of_dicts = [d.get() for d in dicts or []]
-        return dict((k, v) for d in list_of_dicts for k, v in d.items())
+        return {k: v for d in list_of_dicts for k, v in d.items()}
 
     def _get_or_none(self, from_obj):
         return from_obj.get() if from_obj is not None else None
@@ -138,5 +139,5 @@ def get(self):
             'reply_to': self._get_or_none(self.reply_to),
         }
 
-        return dict((key, value) for key, value in mail.items()
-                    if value is not None and value != [] and value != {})
+        return {key: value for key, value in mail.items()
+                if value is not None and value != [] and value != {}}

sendgrid/helpers/mail/plain_text_content.py

@@ -1,6 +1,7 @@
 from .content import Content
 from .validators import ValidateAPIKey
 
+
 class PlainTextContent(Content):
     """Plain text content to be included in your email.
     """

sendgrid/helpers/mail/to_email.py

@@ -1,4 +1,5 @@
 from .email import Email
 
+
 class To(Email):
-    """A to email address with an optional name."""
+    """A to email address with an optional name."""

sendgrid/helpers/mail/validators.py

@@ -3,6 +3,7 @@
 # Various types of Validators
 ################################################################
 
+
 class ValidateAPIKey(object):
     """Validates content to ensure SendGrid API key is not present"""
 
@@ -27,9 +28,8 @@ def __init__(self, regex_strings=None, use_default=True):
             default_regex_string = 'SG\.[0-9a-zA-Z]+\.[0-9a-zA-Z]+'
             self.regexes.add(re.compile(default_regex_string))
 
-
     def validate_message_dict(self, request_body):
-        """With the JSON dict that will be sent to SendGrid's API, 
+        """With the JSON dict that will be sent to SendGrid's API,
             check the content for SendGrid API keys - throw exception if found
         Args:
             request_body (:obj:`dict`): message parameter that is
@@ -44,17 +44,16 @@ def validate_message_dict(self, request_body):
 
         # Default param
         elif isinstance(request_body, dict):
-            
+
             contents = request_body.get("content", list())
-            
+
             for content in contents:
                 if content is not None:
                     if (content.get("type") == "text/html" or
                             isinstance(content.get("value"), str)):
                         message_text = content.get("value", "")
                         self.validate_message_text(message_text)
 
-
     def validate_message_text(self, message_string):
         """With a message string, check to see if it contains a SendGrid API Key
             If a key is found, throw an exception
@@ -68,4 +67,3 @@ def validate_message_text(self, message_string):
             for regex in self.regexes:
                 if regex.match(message_string) is not None:
                     raise APIKeyIncludedException()
-

sendgrid/sendgrid.py

@@ -69,7 +69,7 @@ def __init__(
         self.apikey = apikey or api_key or os.environ.get('SENDGRID_API_KEY')
         self.impersonate_subuser = impersonate_subuser
         self.host = host
-        self.useragent = 'sendgrid/{0};python'.format(__version__)
+        self.useragent = 'sendgrid/{};python'.format(__version__)
         self.version = __version__
 
         self.client = python_http_client.Client(host=self.host,
@@ -79,7 +79,7 @@ def __init__(
     @property
     def _default_headers(self):
         headers = {
-            "Authorization": 'Bearer {0}'.format(self.apikey),
+            "Authorization": 'Bearer {}'.format(self.apikey),
             "User-agent": self.useragent,
             "Accept": 'application/json'
         }

setup.py

@@ -1,4 +1,3 @@
-import sys
 import os
 from io import open
 from setuptools import setup, find_packages
@@ -14,12 +13,9 @@
 
 def getRequires():
     deps = ['python_http_client>=3.0']
-    if sys.version_info < (2, 7):
-        deps.append('unittest2')
-    elif (3, 0) <= sys.version_info < (3, 2):
-        deps.append('unittest2py3k')
     return deps
 
+
 setup(
     name='sendgrid',
     version=str(__version__),
@@ -32,11 +28,11 @@ def getRequires():
     description='SendGrid library for Python',
     long_description=long_description,
     install_requires=getRequires(),
+    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
     classifiers=[
-        'Programming Language :: Python :: 2.6',
+        'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6'

test/test_app.py

@@ -1,13 +1,9 @@
 import os
+import unittest
 
 from sendgrid.helpers.inbound.config import Config
 from sendgrid.helpers.inbound.app import app
 
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
-
 
 class UnitTests(unittest.TestCase):
 
@@ -23,4 +19,4 @@ def test_up_and_running(self):
     def test_used_port_true(self):
         if self.config.debug_mode:
             port = int(os.environ.get("PORT", self.config.port))
-            self.assertEqual(port, self.config.port)
+            self.assertEqual(port, self.config.port)

test/test_config.py

@@ -1,10 +1,8 @@
 import os
+import unittest
+
 import sendgrid.helpers.inbound.config
 from sendgrid.helpers.inbound.config import Config
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
 
 
 class UnitTests(unittest.TestCase):
@@ -39,7 +37,7 @@ def test_initialization(self):
         self.assertTrue(host, self.config.host)
         self.assertTrue(port, self.config.port)
         for key in keys:
-            self.assertTrue(key in self.config.keys)
+            self.assertIn(key, self.config.keys)
 
     def test_init_environment(self):
         config_file = sendgrid.helpers.inbound.config.__file__

test/test_email.py

@@ -1,13 +1,8 @@
 # -*- coding: utf-8 -*-
-import json
+import unittest
 
 from sendgrid.helpers.mail import (Email)
 
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
-
 
 class TestEmailObject(unittest.TestCase):
 
@@ -40,7 +35,7 @@ def test_add_rfc_function_finds_name_not_email(self):
     def test_add_rfc_email(self):
         name = "SomeName"
         address = "test@example.com"
-        name_address = "{0} <{1}>".format(name, address)
+        name_address = "{} <{}>".format(name, address)
         email = Email(name_address)
         self.assertEqual(email.name, name)
         self.assertEqual(email.email, "test@example.com")