From 31da5dc0143bd3eb0fc16c50d27275838ad2f75b Mon Sep 17 00:00:00 2001
From: frostming <frostming@tencent.com>
Date: Fri, 28 Jun 2019 13:11:31 +0800
Subject: [PATCH 1/2] Iterate all possible python paths

---
 pipenv/core.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pipenv/core.py b/pipenv/core.py
index e0df54e375..90ad558444 100644
--- a/pipenv/core.py
+++ b/pipenv/core.py
@@ -2578,8 +2578,9 @@ def do_check(
     args=None,
     pypi_mirror=None,
 ):
-    from .environments import is_verbose
     from pipenv.vendor.vistir.compat import JSONDecodeError
+    from pipenv.vendor.first import first
+
     if not system:
         # Ensure that virtualenv is available.
         ensure_project(
@@ -2618,7 +2619,10 @@ def do_check(
     if not system:
         python = which("python")
     else:
-        python = system_which("python")
+        python = first(system_which(p) for p in ("python", "python3", "python2"))
+    if not python:
+        click.echo(crayons.red("The Python interpreter can't be found."), err=True)
+        sys.exit(1)
     _cmd = [vistir.compat.Path(python).as_posix()]
     # Run the PEP 508 checker in the virtualenv.
     cmd = _cmd + [vistir.compat.Path(pep508checker_path).as_posix()]

From 2b6eb7c437856643cf35429fd4ac18bd58bd5f00 Mon Sep 17 00:00:00 2001
From: frostming <frostming@tencent.com>
Date: Fri, 28 Jun 2019 13:19:10 +0800
Subject: [PATCH 2/2] add news

---
 news/3819.bugfix.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 news/3819.bugfix.rst

diff --git a/news/3819.bugfix.rst b/news/3819.bugfix.rst
new file mode 100644
index 0000000000..a6e05fb5da
--- /dev/null
+++ b/news/3819.bugfix.rst
@@ -0,0 +1 @@
+``pipenv check --system`` should find the correct Python interpreter when ``python`` does not exist on the system.