We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
fiftyone fails to import if not installed in a virtual environment
Due to at least https://github.com/voxel51/fiftyone/blob/v0.1.3/fiftyone/constants.py#L32

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `fiftyone/constants.py`
Content:
```
1 """
2 Package-wide constants.
3 
4 | Copyright 2017-2020, Voxel51, Inc.
5 | `voxel51.com <https://voxel51.com/>`_
6 |
7 """
8 # pragma pylint: disable=redefined-builtin
9 # pragma pylint: disable=unused-wildcard-import
10 # pragma pylint: disable=wildcard-import
11 from __future__ import absolute_import
12 from __future__ import division
13 from __future__ import print_function
14 from __future__ import unicode_literals
15 from builtins import *
16 
17 # pragma pylint: enable=redefined-builtin
18 # pragma pylint: enable=unused-wildcard-import
19 # pragma pylint: enable=wildcard-import
20 
21 import os
22 import sys
23 
24 try:
25     from importlib.metadata import metadata  # Python 3.8
26 except ImportError:
27     from importlib_metadata import metadata  # Python < 3.8
28 
29 
30 # Directories
31 FIFTYONE_DIR = os.path.abspath(os.path.dirname(__file__))
32 FIFTYONE_ENV = os.environ["VIRTUAL_ENV"]
33 FIFTYONE_CONFIG_DIR = os.path.join(os.path.expanduser("~"), ".fiftyone")
34 FIFTYONE_CONFIG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "config.json")
35 BASE_DIR = os.path.dirname(FIFTYONE_DIR)
36 EXAMPLES_DIR = os.path.join(FIFTYONE_DIR, "examples")
37 if not os.path.isdir(EXAMPLES_DIR):
38     EXAMPLES_DIR = os.path.join(BASE_DIR, "examples")
39 
40 # Package metadata
41 _META = metadata("fiftyone")
42 NAME = _META["name"]
43 VERSION = _META["version"]
44 DESCRIPTION = _META["summary"]
45 AUTHOR = _META["author"]
46 AUTHOR_EMAIL = _META["author-email"]
47 URL = _META["home-page"]
48 LICENSE = _META["license"]
49 VERSION_LONG = "%s v%s, %s" % (NAME, VERSION, AUTHOR)
50 
51 # MongoDB setup
52 try:
53     from fiftyone.db import FIFTYONE_DB_BIN_DIR
54 except ImportError:
55     # development installation
56     FIFTYONE_DB_BIN_DIR = os.path.join(FIFTYONE_CONFIG_DIR, "bin")
57 DB_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "var/lib/mongo")
58 DB_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, "mongod")
59 DB_CLIENT_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, "mongo")
60 DB_LOG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "var/log/mongodb/mongo.log")
61 os.environ["PATH"] = os.pathsep.join([FIFTYONE_CONFIG_DIR, os.environ["PATH"]])
62 START_DB = [
63     DB_BIN_PATH,
64     "--dbpath",
65     DB_PATH,
66     "--logpath",
67     DB_LOG_PATH,
68     "--fork",
69 ]
70 STOP_DB = " ".join(
71     [
72         DB_CLIENT_BIN_PATH,
73         "--eval",
74         '''"db.getSiblingDB('admin').shutdownServer()"''',
75         ">/dev/null 2>&1",
76     ]
77 )
78 
79 if sys.platform.startswith("linux"):
80     _STOP_SERVICE = "fuser -k %d/tcp >/dev/null 2>&1"
81 
82 elif sys.platform == "darwin":
83     _STOP_SERVICE = (
84         "lsof -i tcp:%d | grep -v PID | awk '{print $2}' | xargs kill"
85     )
86 
87 else:
88     raise OSError("Unsupported OS: %s" % sys.platform)
89 
90 # Server setup
91 SERVER_DIR = os.path.join(FIFTYONE_DIR, "server")
92 SERVER_ADDR = "http://127.0.0.1:%d"
93 START_SERVER = [
94     "gunicorn",
95     "-w",
96     "1",
97     "--worker-class",
98     "eventlet",
99     "-b",
100     "127.0.0.1:%d",
101     "main:app",
102     "--daemon",
103     "--reload",
104 ]
105 
106 STOP_SERVER = _STOP_SERVICE
107 
108 # App setup
109 try:
110     from fiftyone.gui import FIFTYONE_APP_DIR
111 except ImportError:
112     FIFTYONE_APP_DIR = os.path.join(FIFTYONE_DIR, "../electron")
113
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/fiftyone/constants.py b/fiftyone/constants.py
--- a/fiftyone/constants.py
+++ b/fiftyone/constants.py
@@ -29,7 +29,6 @@
 
 # Directories
 FIFTYONE_DIR = os.path.abspath(os.path.dirname(__file__))
-FIFTYONE_ENV = os.environ["VIRTUAL_ENV"]
 FIFTYONE_CONFIG_DIR = os.path.join(os.path.expanduser("~"), ".fiftyone")
 FIFTYONE_CONFIG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "config.json")
 BASE_DIR = os.path.dirname(FIFTYONE_DIR)
@@ -58,7 +57,6 @@
 DB_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, "mongod")
 DB_CLIENT_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, "mongo")
 DB_LOG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, "var/log/mongodb/mongo.log")
-os.environ["PATH"] = os.pathsep.join([FIFTYONE_CONFIG_DIR, os.environ["PATH"]])
 START_DB = [
     DB_BIN_PATH,
     "--dbpath",

{"golden_diff": "diff --git a/fiftyone/constants.py b/fiftyone/constants.py\n--- a/fiftyone/constants.py\n+++ b/fiftyone/constants.py\n@@ -29,7 +29,6 @@\n \n # Directories\n FIFTYONE_DIR = os.path.abspath(os.path.dirname(__file__))\n-FIFTYONE_ENV = os.environ[\"VIRTUAL_ENV\"]\n FIFTYONE_CONFIG_DIR = os.path.join(os.path.expanduser(\"~\"), \".fiftyone\")\n FIFTYONE_CONFIG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"config.json\")\n BASE_DIR = os.path.dirname(FIFTYONE_DIR)\n@@ -58,7 +57,6 @@\n DB_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, \"mongod\")\n DB_CLIENT_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, \"mongo\")\n DB_LOG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"var/log/mongodb/mongo.log\")\n-os.environ[\"PATH\"] = os.pathsep.join([FIFTYONE_CONFIG_DIR, os.environ[\"PATH\"]])\n START_DB = [\n     DB_BIN_PATH,\n     \"--dbpath\",\n", "issue": "fiftyone fails to import if not installed in a virtual environment\nDue to at least https://github.com/voxel51/fiftyone/blob/v0.1.3/fiftyone/constants.py#L32\n", "before_files": [{"content": "\"\"\"\nPackage-wide constants.\n\n| Copyright 2017-2020, Voxel51, Inc.\n| `voxel51.com <https://voxel51.com/>`_\n|\n\"\"\"\n# pragma pylint: disable=redefined-builtin\n# pragma pylint: disable=unused-wildcard-import\n# pragma pylint: disable=wildcard-import\nfrom __future__ import absolute_import\nfrom __future__ import division\nfrom __future__ import print_function\nfrom __future__ import unicode_literals\nfrom builtins import *\n\n# pragma pylint: enable=redefined-builtin\n# pragma pylint: enable=unused-wildcard-import\n# pragma pylint: enable=wildcard-import\n\nimport os\nimport sys\n\ntry:\n    from importlib.metadata import metadata  # Python 3.8\nexcept ImportError:\n    from importlib_metadata import metadata  # Python < 3.8\n\n\n# Directories\nFIFTYONE_DIR = os.path.abspath(os.path.dirname(__file__))\nFIFTYONE_ENV = os.environ[\"VIRTUAL_ENV\"]\nFIFTYONE_CONFIG_DIR = os.path.join(os.path.expanduser(\"~\"), \".fiftyone\")\nFIFTYONE_CONFIG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"config.json\")\nBASE_DIR = os.path.dirname(FIFTYONE_DIR)\nEXAMPLES_DIR = os.path.join(FIFTYONE_DIR, \"examples\")\nif not os.path.isdir(EXAMPLES_DIR):\n    EXAMPLES_DIR = os.path.join(BASE_DIR, \"examples\")\n\n# Package metadata\n_META = metadata(\"fiftyone\")\nNAME = _META[\"name\"]\nVERSION = _META[\"version\"]\nDESCRIPTION = _META[\"summary\"]\nAUTHOR = _META[\"author\"]\nAUTHOR_EMAIL = _META[\"author-email\"]\nURL = _META[\"home-page\"]\nLICENSE = _META[\"license\"]\nVERSION_LONG = \"%s v%s, %s\" % (NAME, VERSION, AUTHOR)\n\n# MongoDB setup\ntry:\n    from fiftyone.db import FIFTYONE_DB_BIN_DIR\nexcept ImportError:\n    # development installation\n    FIFTYONE_DB_BIN_DIR = os.path.join(FIFTYONE_CONFIG_DIR, \"bin\")\nDB_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"var/lib/mongo\")\nDB_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, \"mongod\")\nDB_CLIENT_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, \"mongo\")\nDB_LOG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"var/log/mongodb/mongo.log\")\nos.environ[\"PATH\"] = os.pathsep.join([FIFTYONE_CONFIG_DIR, os.environ[\"PATH\"]])\nSTART_DB = [\n    DB_BIN_PATH,\n    \"--dbpath\",\n    DB_PATH,\n    \"--logpath\",\n    DB_LOG_PATH,\n    \"--fork\",\n]\nSTOP_DB = \" \".join(\n    [\n        DB_CLIENT_BIN_PATH,\n        \"--eval\",\n        '''\"db.getSiblingDB('admin').shutdownServer()\"''',\n        \">/dev/null 2>&1\",\n    ]\n)\n\nif sys.platform.startswith(\"linux\"):\n    _STOP_SERVICE = \"fuser -k %d/tcp >/dev/null 2>&1\"\n\nelif sys.platform == \"darwin\":\n    _STOP_SERVICE = (\n        \"lsof -i tcp:%d | grep -v PID | awk '{print $2}' | xargs kill\"\n    )\n\nelse:\n    raise OSError(\"Unsupported OS: %s\" % sys.platform)\n\n# Server setup\nSERVER_DIR = os.path.join(FIFTYONE_DIR, \"server\")\nSERVER_ADDR = \"http://127.0.0.1:%d\"\nSTART_SERVER = [\n    \"gunicorn\",\n    \"-w\",\n    \"1\",\n    \"--worker-class\",\n    \"eventlet\",\n    \"-b\",\n    \"127.0.0.1:%d\",\n    \"main:app\",\n    \"--daemon\",\n    \"--reload\",\n]\n\nSTOP_SERVER = _STOP_SERVICE\n\n# App setup\ntry:\n    from fiftyone.gui import FIFTYONE_APP_DIR\nexcept ImportError:\n    FIFTYONE_APP_DIR = os.path.join(FIFTYONE_DIR, \"../electron\")\n", "path": "fiftyone/constants.py"}], "after_files": [{"content": "\"\"\"\nPackage-wide constants.\n\n| Copyright 2017-2020, Voxel51, Inc.\n| `voxel51.com <https://voxel51.com/>`_\n|\n\"\"\"\n# pragma pylint: disable=redefined-builtin\n# pragma pylint: disable=unused-wildcard-import\n# pragma pylint: disable=wildcard-import\nfrom __future__ import absolute_import\nfrom __future__ import division\nfrom __future__ import print_function\nfrom __future__ import unicode_literals\nfrom builtins import *\n\n# pragma pylint: enable=redefined-builtin\n# pragma pylint: enable=unused-wildcard-import\n# pragma pylint: enable=wildcard-import\n\nimport os\nimport sys\n\ntry:\n    from importlib.metadata import metadata  # Python 3.8\nexcept ImportError:\n    from importlib_metadata import metadata  # Python < 3.8\n\n\n# Directories\nFIFTYONE_DIR = os.path.abspath(os.path.dirname(__file__))\nFIFTYONE_CONFIG_DIR = os.path.join(os.path.expanduser(\"~\"), \".fiftyone\")\nFIFTYONE_CONFIG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"config.json\")\nBASE_DIR = os.path.dirname(FIFTYONE_DIR)\nEXAMPLES_DIR = os.path.join(FIFTYONE_DIR, \"examples\")\nif not os.path.isdir(EXAMPLES_DIR):\n    EXAMPLES_DIR = os.path.join(BASE_DIR, \"examples\")\n\n# Package metadata\n_META = metadata(\"fiftyone\")\nNAME = _META[\"name\"]\nVERSION = _META[\"version\"]\nDESCRIPTION = _META[\"summary\"]\nAUTHOR = _META[\"author\"]\nAUTHOR_EMAIL = _META[\"author-email\"]\nURL = _META[\"home-page\"]\nLICENSE = _META[\"license\"]\nVERSION_LONG = \"%s v%s, %s\" % (NAME, VERSION, AUTHOR)\n\n# MongoDB setup\ntry:\n    from fiftyone.db import FIFTYONE_DB_BIN_DIR\nexcept ImportError:\n    # development installation\n    FIFTYONE_DB_BIN_DIR = os.path.join(FIFTYONE_CONFIG_DIR, \"bin\")\nDB_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"var/lib/mongo\")\nDB_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, \"mongod\")\nDB_CLIENT_BIN_PATH = os.path.join(FIFTYONE_DB_BIN_DIR, \"mongo\")\nDB_LOG_PATH = os.path.join(FIFTYONE_CONFIG_DIR, \"var/log/mongodb/mongo.log\")\nSTART_DB = [\n    DB_BIN_PATH,\n    \"--dbpath\",\n    DB_PATH,\n    \"--logpath\",\n    DB_LOG_PATH,\n    \"--fork\",\n]\nSTOP_DB = \" \".join(\n    [\n        DB_CLIENT_BIN_PATH,\n        \"--eval\",\n        '''\"db.getSiblingDB('admin').shutdownServer()\"''',\n        \">/dev/null 2>&1\",\n    ]\n)\n\nif sys.platform.startswith(\"linux\"):\n    _STOP_SERVICE = \"fuser -k %d/tcp >/dev/null 2>&1\"\n\nelif sys.platform == \"darwin\":\n    _STOP_SERVICE = (\n        \"lsof -i tcp:%d | grep -v PID | awk '{print $2}' | xargs kill\"\n    )\n\nelse:\n    raise OSError(\"Unsupported OS: %s\" % sys.platform)\n\n# Server setup\nSERVER_DIR = os.path.join(FIFTYONE_DIR, \"server\")\nSERVER_ADDR = \"http://127.0.0.1:%d\"\nSTART_SERVER = [\n    \"gunicorn\",\n    \"-w\",\n    \"1\",\n    \"--worker-class\",\n    \"eventlet\",\n    \"-b\",\n    \"127.0.0.1:%d\",\n    \"main:app\",\n    \"--daemon\",\n    \"--reload\",\n]\n\nSTOP_SERVER = _STOP_SERVICE\n\n# App setup\ntry:\n    from fiftyone.gui import FIFTYONE_APP_DIR\nexcept ImportError:\n    FIFTYONE_APP_DIR = os.path.join(FIFTYONE_DIR, \"../electron\")\n", "path": "fiftyone/constants.py"}]}