Python full version in pipfile

news/5345.behavior.rst

@@ -0,0 +1 @@
+New pipfiles show python_full_version under [requires] if specified. Previously creating a new pipenv project would only specify in the Pipfile the major and minor version, i.e. "python_version = 3.7". Now if you create a new project with a fully named python version it will record both in the Pipfile. So: "python_version = 3.7" and "python_full_version = 3.7.2"

pipenv/project.py

@@ -675,8 +675,10 @@ def create_pipfile(self, python=None):
             else:
                 required_python = self.which("python")
         version = python_version(required_python) or self.s.PIPENV_DEFAULT_PYTHON_VERSION
-        if version and len(version.split(".")) > 2:
+        if version:
             data["requires"] = {"python_version": ".".join(version.split(".")[:2])}
+        if python and version and len(version.split(".")) > 2:
+            data["requires"].update({"python_full_version": version})
         self.write_toml(data)
 
     @classmethod

tests/integration/test_install_basic.py

@@ -1,4 +1,4 @@
-import os
+import os, sys
 from pathlib import Path
 from tempfile import TemporaryDirectory
 
@@ -372,6 +372,22 @@ def test_install_creates_pipfile(pipenv_instance_pypi):
         c = p.pipenv("install")
         assert c.returncode == 0
         assert os.path.isfile(p.pipfile_path)
+        python_version = str(sys.version_info.major) + "." + str(sys.version_info.minor)
+        assert p.pipfile["requires"] == {'python_version': python_version}
+
+
+@pytest.mark.basic
+@pytest.mark.install
+def test_create_pipfile_requires_python_full_version(pipenv_instance_pypi):
+    with pipenv_instance_pypi(chdir=True) as p:
+        python_version = str(sys.version_info.major) + "." + str(sys.version_info.minor)
+        python_full_version = python_version + "." + str(sys.version_info.micro)
+        c = p.pipenv(f"--python {python_full_version}")
+        assert c.returncode == 0
+        assert p.pipfile["requires"] == {
+            'python_full_version': python_full_version,
+            'python_version': python_version
+            }
 
 
 @pytest.mark.basic