From d794b8e0a20cb62707d641052a92175d17a1832e Mon Sep 17 00:00:00 2001
From: Nate Prewitt <Nate.Prewitt@gmail.com>
Date: Fri, 27 Jan 2017 13:15:31 -0700
Subject: [PATCH] perform proper_case as best effort approach

---
 HISTORY.txt   |  1 +
 pipenv/cli.py | 10 ++++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/HISTORY.txt b/HISTORY.txt
index eb30df81..a2106db9 100644
--- a/HISTORY.txt
+++ b/HISTORY.txt
@@ -1,6 +1,7 @@
 3.2.5:
  - Significant speed improvements for pipenv run and pipenv shell.
  - Shell completion via click-completion.
+ - Perform package name normalization as best effort attempt.
 3.2.4:
  - $ pipenv uninstall --all
  - Don't uninstall setuptools, wheel, pip, or six.
diff --git a/pipenv/cli.py b/pipenv/cli.py
index 0d44781d..b4167e85 100644
--- a/pipenv/cli.py
+++ b/pipenv/cli.py
@@ -110,8 +110,14 @@ def ensure_proper_casing():
             # Replace each package with proper casing.
             for dep in p[section].keys():
 
-                # Get new casing for package name.
-                new_casing = proper_case(dep)
+                # Attempt to normalize name from PyPI.
+                # Use provided name if better one can't be found.
+                try:
+                    # Get new casing for package name.
+                    new_casing = proper_case(dep)
+                except IOError:
+                    # Unable to normalize package name.
+                    continue
 
                 if new_casing == dep:
                     continue