Merge branch 'master' into exists-fix

Author: mariusvniekerk

.travis.yml

@@ -22,7 +22,7 @@ install:
   - export BOTO_CONFIG=/dev/null
   - export AWS_ACCESS_KEY_ID=foobar_key
   - export AWS_SECRET_ACCESS_KEY=foobar_secret
-  - conda install moto "pytest<5" -c conda-forge -y
+  - conda install boto=2.49.0 moto>=1.3.12 pytest -c conda-forge -y
   - pip install git+https://github.com/intake/filesystem_spec/ --no-deps
 
 script:

docs/source/index.rst

@@ -17,11 +17,9 @@ emulates the standard ``File`` protocol (``read``, ``write``, ``tell``,
 ``seek``), such that functions expecting a file can access S3. Only binary read
 and write modes are implemented, with blocked caching.
 
-This project was originally designed as a storage-layer interface
-for `dask.distributed`_ and has a very similar interface to `hdfs3`_
+This uses and is based upon `fsspec`_
 
-.. _`dask.distributed`: https://distributed.readthedocs.io/en/latest
-.. _`hdfs3`: http://hdfs3.readthedocs.io/en/latest/
+.. _fsspec: https://filesystem-spec.readthedocs.io/en/latest/
 
 Examples
 --------
@@ -77,7 +75,7 @@ The following are known current omissions:
 - file access is always binary (although readline and iterating by line are
 possible)
 
-- no permissions/access-control (i.e., no chmod/chmown methods)
+- no permissions/access-control (i.e., no chmod/chown methods)
 
 
 Credentials

s3fs/core.py

@@ -854,10 +854,10 @@ def invalidate_cache(self, path=None):
             self.dircache.pop(path, None)
             self.dircache.pop(self._parent(path), None)
 
-    def walk(self, path, maxdepth=None):
+    def walk(self, path, maxdepth=None, **kwargs):
         if path in ['', '*', 's3://']:
             raise ValueError('Cannot crawl all of S3')
-        return super().walk(path, maxdepth=maxdepth)
+        return super().walk(path, maxdepth=maxdepth, **kwargs)
 
 
 class S3File(AbstractBufferedFile):