Changed the behavior of 'open_fileobj' for local files, made 'open' function use 'open_fileobj'

README.md

@@ -55,7 +55,7 @@ s3_fs.info('s3://csst-prod/gaia/test/requirements.txt', s3_options=s3_options)
 ### Open for read/write
 ```python
 from csst_fs import s3_fs
-# open single file
+# open single file (s3 or local)
 with s3_fs.open('s3://csst-prod/gaia/data') as file:
     file.read()
 with s3_fs.open('s3://csst-prod/gaia/test/requirements.txt', s3_options=s3_options, mode='w') as file:

csst_fs/fsspec_fileobj.py

@@ -5,5 +5,5 @@ def open_fileobj(path: str, s3_options, mode='w'):
         s3_fs = fsspec.filesystem('s3', **s3_options)
         fileobj = s3_fs.open(path, mode=mode).__enter__()
     else:
-        fileobj = path
+        fileobj = open(path, mode=mode).__enter__()
     return fileobj
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csst_fs/s3_fs.py

 import fsspec
 from .s3_config import load_s3_options
+from .fsspec_fileobj import open_fileobj
 
 def put(lpath, rpath, recursive=False, callback=fsspec.callbacks.DEFAULT_CALLBACK, maxdepth=None, s3_options=load_s3_options(), **kwargs,): 
     s3_fs = fsspec.filesystem('s3', **s3_options)
@@ -13,6 +14,5 @@ def info(path, bucket=None, key=None, refresh=False, version_id=None, s3_options
     s3_fs = fsspec.filesystem('s3', **s3_options)
     return s3_fs.info(path, bucket, key, refresh, version_id)
 
-def open(path, s3_options=load_s3_options(), **kwargs):
-    s3_fs = fsspec.filesystem('s3', **s3_options)
-    return s3_fs.open(path, **kwargs)
+def open(file: str, mode: str='r', s3_options=load_s3_options()):
+    return open_fileobj(path=file, s3_options=s3_options, mode=mode)
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