Static code analysis and corrections

backend/venv/lib/python3.6/site-packages/pandas/io/s3.py

@@ -0,0 +1,39 @@
+""" s3 support for remote file interactivity """
+from pandas import compat
+try:
+    import s3fs
+    from botocore.exceptions import NoCredentialsError
+except:
+    raise ImportError("The s3fs library is required to handle s3 files")
+
+if compat.PY3:
+    from urllib.parse import urlparse as parse_url
+else:
+    from urlparse import urlparse as parse_url
+
+
+def _strip_schema(url):
+    """Returns the url without the s3:// part"""
+    result = parse_url(url)
+    return result.netloc + result.path
+
+
+def get_filepath_or_buffer(filepath_or_buffer, encoding=None,
+                           compression=None, mode=None):
+
+    if mode is None:
+        mode = 'rb'
+
+    fs = s3fs.S3FileSystem(anon=False)
+    try:
+        filepath_or_buffer = fs.open(_strip_schema(filepath_or_buffer), mode)
+    except (compat.FileNotFoundError, NoCredentialsError):
+        # boto3 has troubles when trying to access a public file
+        # when credentialed...
+        # An OSError is raised if you have credentials, but they
+        # aren't valid for that bucket.
+        # A NoCredentialsError is raised if you don't have creds
+        # for that bucket.
+        fs = s3fs.S3FileSystem(anon=True)
+        filepath_or_buffer = fs.open(_strip_schema(filepath_or_buffer), mode)
+    return filepath_or_buffer, None, compression, True