Merge pull request #81 from AartGoossens/feature/fix_developer_data_integer_column

Fixes integer columns for read_fit()

Author: AartGoossens

docs/docs/changelog.md

@@ -16,6 +16,8 @@ Types of changes:
 - `Security` in case of vulnerabilities.
 
 ## [Unreleased] - {ISO8601 date}
+### Fixed
+- `sweat.read_fit()` now supports integer column names.
 
 ## [0.20.2] - 2021-04-16
 ### Fixed

sweat/io/fit.py

@@ -18,7 +18,7 @@
 
 def process_location_columns(df, columns=None):
     if columns is None:
-        columns = [c for c in df.columns if c.endswith("_lat") or c.endswith("_long")]
+        columns = [c for c in df.columns if isinstance(c, str) and (c.endswith("_lat") or c.endswith("_long"))]
     else:
         columns = [c for c in columns if c in df.columns]