importerror more clean for anaconda users in choropleth ff

CHANGELOG.md

@@ -2,6 +2,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [2.7.1] - [UNRELEASED]
+### Updated
+- error message for `plotly.figure_factory.create_choropleth` is now helpful to Anaconda users who do not have the correct modules installed for the County Choropleth figure factory.
+
 ## [2.7.0] - 2018-05-23
 ### Updated
 - Updated `plotly.min.js` to version 1.38.0.

plotly/figure_factory/_county_choropleth.py

@@ -565,12 +565,20 @@ def create_choropleth(fips, values, scope=['usa'], binning_endpoints=None,
             "geopandas, pyshp and shapely must be installed for this figure "
             "factory.\n\nRun the following commands to install the correct "
             "versions of the following modules:\n\n"
-            "`pip install geopandas==0.3.0`\n"
-            "`pip install pyshp==1.2.10`\n"
-            "`pip install shapely==1.6.3`\n\n"
+            "```\n"
+            "pip install geopandas==0.3.0\n"
+            "pip install pyshp==1.2.10\n"
+            "pip install shapely==1.6.3\n"
+            "```\n"
             "If you are using Windows, follow this post to properly "
             "install geopandas and dependencies:"
-            "http://geoffboeing.com/2014/09/using-geopandas-windows/"
+            "http://geoffboeing.com/2014/09/using-geopandas-windows/\n\n"
+            "If you are using Anaconda, do not use PIP to install the "
+            "packages above. Instead use conda to install them:\n\n"
+            "```\n"
+            "conda install plotly\n"
+            "conda install geopandas\n"
+            "```"
         )
 
     df, df_state = _create_us_counties_df(st_to_state_name_dict,