fix: support conn_pool ping before init | add missing dep in py3.6 (#339

)

* fix: support conn_pool ping before init

* fix: missing dep in python3.6

httpcore-->anyio-->contextvars when it's < python3.7
Whoile this was not properly handled by setup.py

Thus this failed, somehow it rollback to .local cache
in ci runner.

* fix: make python3.7+ for setup.py happy

nebula3/gclient/net/ConnectionPool.py

@@ -220,6 +220,9 @@ def ping(self, address):
         """
         try:
             conn = Connection()
+            # support ping before self.init()
+            if self._configs is None:
+                self._configs = Config()
             conn.open_SSL(
                 address[0],
                 address[1],

nebula3/gclient/net/SessionPool.py

@@ -86,6 +86,8 @@ def init(self, configs=None):
                 configs, SessionPoolConfig
             ), 'wrong type of SessionPoolConfig, try this: `from nebula3.Config import SessionPoolConfig`'
             self._configs = configs
+        else:
+            self._configs = SessionPoolConfig()
         # check configs
         try:
             self._check_configs()

setup.py

@@ -4,32 +4,38 @@
 #
 # This source code is licensed under Apache 2.0 License.
 
-
+import sys
 from setuptools import setup, find_packages
 from pathlib import Path
 
 base_dir = Path(__file__).parent
-long_description = (base_dir / 'README.md').read_text()
+long_description = (base_dir / "README.md").read_text()
+
+requirements = [
+    "httplib2 >= 0.20.0",
+    "future >= 0.18.0",
+    "six >= 1.16.0",
+    "pytz >= 2021.1",
+    "httpx[http2] >= 0.22.0",
+]
 
+if sys.version_info < (3, 7):
+    # httpcore-->anyio-->contextvars when it's < 3.7
+    # while setuptools doesn't handle the dependency well
+    requirements.append("contextvars==2.4")
 
 setup(
-    name='nebula3-python',
-    version='3.8.0',
-    license='Apache 2.0',
-    author='vesoft-inc',
-    author_email='[email protected]',
-    description='Python client for NebulaGraph V3.4',
+    name="nebula3-python",
+    version="3.8.0",
+    license="Apache 2.0",
+    author="vesoft-inc",
+    author_email="[email protected]",
+    description="Python client for NebulaGraph V3.4",
     long_description=long_description,
-    long_description_content_type='text/markdown',
-    url='https://github.com/vesoft-inc/nebula-python',
-    install_requires=[
-        'httplib2 >= 0.20.0',
-        'future >= 0.18.0',
-        'six >= 1.16.0',
-        'pytz >= 2021.1',
-        'httpx[http2] >= 0.22.0',
-    ],
+    long_description_content_type="text/markdown",
+    url="https://github.com/vesoft-inc/nebula-python",
+    install_requires=requirements,
     packages=find_packages(),
-    platforms=['3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12'],
-    package_dir={'nebula3': 'nebula3'},
+    platforms=["3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12"],
+    package_dir={"nebula3": "nebula3"},
 )