fix nullcontext missing on python 3.6

ssh_utilities/remote/remote.py

@@ -2,7 +2,10 @@
 
 import logging
 import os
-from contextlib import nullcontext
+try:
+    from contextlib import nullcontext
+except ImportError:
+    from ..utils import NullContext as nullcontext  # type: ignore
 from pathlib import Path
 from threading import RLock
 from typing import TYPE_CHECKING, ContextManager, Optional, Union

ssh_utilities/utils.py

@@ -17,7 +17,7 @@
 
 __all__ = ["ProgressBar", "bytes_2_human_readable", "CompletedProcess",
            "lprint", "for_all_methods", "glob2re", "file_filter",
-           "config_parser", "context_timeit"]
+           "config_parser", "context_timeit", "NullContext"]
 
 
 class CompletedProcess:
@@ -427,6 +427,15 @@ def context_timeit(quiet: bool = False):
         pass
 
 
+class NullContext:
+    """Replacement for contextlib.nullcontext for python 3.6."""
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        pass
+
 # \033[<L>;<C>H # Move the cursor to line L, column C
 # \033[<N>A     # Move the cursor up N lines
 # \033[<N>B     # Move the cursor down N lines

ssh_utilities/version.py

@@ -1 +1 @@
-__version__ = "0.5.3"
+__version__ = "0.5.4"