Make CloudPath Pathlike (#72)

* add _fspath__

* add test

* pr changes

* call open file to appease flake8

cloudpathlib/cloudpath.py

@@ -207,6 +207,11 @@ def __hash__(self):
     def __eq__(self, other: Any):
         return repr(self) == repr(other)
 
+    def __fspath__(self):
+        if self.is_file():
+            self._refresh_cache(force_overwrite_from_cloud=False)
+        return str(self._local)
+
     # ====================== NOT IMPLEMENTED ======================
     # absolute - no cloud equivalent; all cloud paths are absolute already
     # as_posix - no cloud equivalent; not needed since we assume url separator
@@ -277,6 +282,10 @@ def as_uri(self) -> str:
     def exists(self) -> bool:
         return self.client._exists(self)
 
+    @property
+    def fspath(self) -> str:
+        return self.__fspath__()
+
     def glob(self, pattern: str) -> Iterable["CloudPath"]:
         # strip cloud prefix from pattern if it is included
         if pattern.startswith(self.cloud_prefix):

tests/test_cloudpath_instantiation.py

@@ -1,3 +1,5 @@
+import os
+
 import pytest
 
 from cloudpathlib import AzureBlobPath, CloudPath, InvalidPrefix, MissingDependencies, S3Path
@@ -60,3 +62,19 @@ def test_dependencies_not_loaded(rig, monkeypatch):
         CloudPath(f"{rig.cloud_prefix}/bucket/dir_0/file0_0.txt")
     with pytest.raises(MissingDependencies):
         rig.create_cloud_path("bucket/dir_0/file0_0.txt")
+
+
+def test_is_pathlike(rig):
+    p = rig.create_cloud_path("bucket")
+    assert isinstance(p, os.PathLike)
+
+
+def test_fspath(rig):
+    p = rig.create_cloud_path("bucket")
+    os.fspath(p)
+
+
+def test_os_open(rig):
+    p = rig.create_cloud_path("bucket/dir_0/file0_0.txt")
+    with open(p, "r") as f:
+        assert f.readable()