Fix "SyntaxWarning: is with a literal."

Author: nis-spiir

azure-storage-blob/azure/storage/blob/_upload_chunking.py

@@ -406,7 +406,7 @@ def read(self, n):
             n = self._length - self._position
 
         # return fast
-        if n is 0 or self._buffer.closed:
+        if n == 0 or self._buffer.closed:
             return b''
 
         # attempt first read from the read buffer and update position

azure-storage-blob/azure/storage/blob/baseblobservice.py

@@ -1068,7 +1068,7 @@ def acquire_container_lease(
         :return: str
         '''
         _validate_not_none('lease_duration', lease_duration)
-        if lease_duration is not -1 and \
+        if lease_duration != -1 and \
                 (lease_duration < 15 or lease_duration > 60):
             raise ValueError(_ERROR_INVALID_LEASE_DURATION)
 
@@ -2776,7 +2776,7 @@ def acquire_blob_lease(self, container_name, blob_name,
         '''
         _validate_not_none('lease_duration', lease_duration)
 
-        if lease_duration is not -1 and \
+        if lease_duration != -1 and \
                 (lease_duration < 15 or lease_duration > 60):
             raise ValueError(_ERROR_INVALID_LEASE_DURATION)
         lease = self._lease_blob_impl(container_name,

azure-storage-common/azure/storage/common/_connection.py

@@ -79,7 +79,7 @@ def __init__(self, service, account_name=None, account_key=None, sas_token=None,
                 path = parsed_url.path.rstrip('/')
 
                 self.primary_endpoint = parsed_url.netloc + path
-                self.protocol = self.protocol if parsed_url.scheme is '' else parsed_url.scheme
+                self.protocol = self.protocol if parsed_url.scheme == '' else parsed_url.scheme
             else:
                 if not self.account_name:
                     raise ValueError(_ERROR_STORAGE_MISSING_INFO)