smooth sailing

Signed-off-by: Kenneth Reitz <me@kennethreitz.org>

pipenv/cli.py

@@ -304,7 +304,7 @@ def ensure_python(three=None, python=None):
     if python:
         path_to_python = find_a_system_python(python)
 
-    if not path_to_python:
+    if not path_to_python and python is not None:
         # We need to install Python.
         click.echo(
             '{0}: Python {1} {2}'.format(
@@ -604,7 +604,8 @@ def do_create_virtualenv(python=None):
         ))
 
     # Use virutalenv's -p python.
-    cmd = cmd + ['-p', python]
+    if python:
+        cmd = cmd + ['-p', python]
 
     # Actually create the virtualenv.
     with spinner():

pipenv/project.py

@@ -52,7 +52,7 @@ class Project(object):
     @property
     def required_python_version(self):
         if self.pipfile_exists:
-            return self.parsed_pipfile.get('requires').get('python_version')
+            return self.parsed_pipfile.get('requires', {}).get('python_version')
 
     @property
     def project_directory(self):