Add isort and flake8 to CI (#869)

* Run isort.

* Clean up unused assignments.

* Add flake8 linting step.

plugins/module_utils/crypto/module_backends/certificate.py

@@ -6,6 +6,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -14,31 +16,30 @@ import traceback
 
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
-
-from ansible_collections.community.crypto.plugins.module_utils.argspec import ArgumentSpec
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
+from ansible_collections.community.crypto.plugins.module_utils.argspec import (
+    ArgumentSpec,
+)
 from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
-    OpenSSLObjectError,
     OpenSSLBadPassphraseError,
+    OpenSSLObjectError,
 )
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    load_privatekey,
-    load_certificate,
-    load_certificate_request,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
     cryptography_compare_public_keys,
     get_not_valid_after,
     get_not_valid_before,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.certificate_info import (
     get_certificate_info,
 )
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    load_certificate,
+    load_certificate_request,
+    load_privatekey,
+)
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
+
 
 MINIMAL_CRYPTOGRAPHY_VERSION = '1.6'
 
@@ -101,7 +102,7 @@ class CertificateBackend(object):
             result = get_certificate_info(self.module, self.backend, data, prefer_one_fingerprint=True)
             result['can_parse_certificate'] = True
             return result
-        except Exception as exc:
+        except Exception:
             return dict(can_parse_certificate=False)
 
     @abc.abstractmethod
@@ -199,7 +200,7 @@ class CertificateBackend(object):
                     csr_ext = self.csr.extensions.get_extension_for_oid(cert_ext.oid)
                     if cert_ext != csr_ext:
                         return False
-                except cryptography.x509.ExtensionNotFound as dummy:
+                except cryptography.x509.ExtensionNotFound:
                     return False
             return True
 
@@ -208,14 +209,14 @@ class CertificateBackend(object):
         # Get hold of certificate's SKI
         try:
             ext = self.existing_certificate.extensions.get_extension_for_class(x509.SubjectKeyIdentifier)
-        except cryptography.x509.ExtensionNotFound as dummy:
+        except cryptography.x509.ExtensionNotFound:
             return False
         # Get hold of CSR's SKI for 'create_if_not_provided'
         csr_ext = None
         if self.create_subject_key_identifier == 'create_if_not_provided':
             try:
                 csr_ext = self.csr.extensions.get_extension_for_class(x509.SubjectKeyIdentifier)
-            except cryptography.x509.ExtensionNotFound as dummy:
+            except cryptography.x509.ExtensionNotFound:
                 pass
         if csr_ext is None:
             # If CSR had no SKI, or we chose to ignore it ('always_create'), compare with created SKI
@@ -234,7 +235,7 @@ class CertificateBackend(object):
 
         try:
             self._ensure_existing_certificate_loaded()
-        except Exception as dummy:
+        except Exception:
             return True
 
         # Check whether private key matches

plugins/module_utils/crypto/module_backends/certificate_acme.py

@@ -6,6 +6,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -13,11 +15,10 @@ import os
 import tempfile
 import traceback
 
-from ansible.module_utils.common.text.converters import to_native, to_bytes
-
+from ansible.module_utils.common.text.converters import to_bytes, to_native
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.certificate import (
-    CertificateError,
     CertificateBackend,
+    CertificateError,
     CertificateProvider,
 )
 
@@ -68,7 +69,7 @@ class AcmeCertificateBackend(CertificateBackend):
             except Exception as err:
                 try:
                     f.close()
-                except Exception as dummy:
+                except Exception:
                     pass
                 self.module.fail_json(
                     msg="failed to create temporary CSR file: %s" % to_native(err),

plugins/module_utils/crypto/module_backends/certificate_entrust.py

@@ -6,37 +6,39 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
 import datetime
 import os
 
-from ansible.module_utils.common.text.converters import to_native, to_bytes
-
-from ansible_collections.community.crypto.plugins.module_utils.ecs.api import ECSClient, RestOperationException, SessionConfigurationException
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    load_certificate,
-)
-
+from ansible.module_utils.common.text.converters import to_bytes, to_native
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
     CRYPTOGRAPHY_TIMEZONE,
     cryptography_serial_number_of_cert,
     get_not_valid_after,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.certificate import (
-    CertificateError,
     CertificateBackend,
+    CertificateError,
     CertificateProvider,
 )
-
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    load_certificate,
+)
+from ansible_collections.community.crypto.plugins.module_utils.ecs.api import (
+    ECSClient,
+    RestOperationException,
+    SessionConfigurationException,
+)
 from ansible_collections.community.crypto.plugins.module_utils.time import (
     get_now_datetime,
     get_relative_time_option,
 )
 
+
 try:
     from cryptography.x509.oid import NameOID
 except ImportError:
@@ -157,7 +159,7 @@ class EntrustCertificateBackend(CertificateBackend):
         cert_details = {}
         try:
             self._ensure_existing_certificate_loaded()
-        except Exception as dummy:
+        except Exception:
             return
         if self.existing_certificate:
             serial_number = None

plugins/module_utils/crypto/module_backends/certificate_info.py

@@ -7,6 +7,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -17,14 +19,6 @@ import traceback
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
 from ansible.module_utils.common.text.converters import to_native
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    load_certificate,
-    get_fingerprint_of_bytes,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
     CRYPTOGRAPHY_TIMEZONE,
     cryptography_decode_name,
@@ -34,14 +28,20 @@ from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptograp
     get_not_valid_after,
     get_not_valid_before,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.publickey_info import (
     get_publickey_info,
 )
-
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    get_fingerprint_of_bytes,
+    load_certificate,
+)
 from ansible_collections.community.crypto.plugins.module_utils.time import (
     get_now_datetime,
 )
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
+
 
 MINIMAL_CRYPTOGRAPHY_VERSION = '1.6'
 
@@ -372,7 +372,7 @@ class CertificateInfoRetrievalCryptography(CertificateInfoRetrieval):
                 if desc.access_method == x509.oid.AuthorityInformationAccessOID.OCSP:
                     if isinstance(desc.access_location, x509.UniformResourceIdentifier):
                         return desc.access_location.value
-        except x509.ExtensionNotFound as dummy:
+        except x509.ExtensionNotFound:
             pass
         return None
 
@@ -383,7 +383,7 @@ class CertificateInfoRetrievalCryptography(CertificateInfoRetrieval):
                 if desc.access_method == x509.oid.AuthorityInformationAccessOID.CA_ISSUERS:
                     if isinstance(desc.access_location, x509.UniformResourceIdentifier):
                         return desc.access_location.value
-        except x509.ExtensionNotFound as dummy:
+        except x509.ExtensionNotFound:
             pass
         return None
 

plugins/module_utils/crypto/module_backends/certificate_ownca.py

@@ -6,25 +6,17 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
 import os
-
 from random import randrange
 
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
     OpenSSLBadPassphraseError,
 )
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    load_privatekey,
-    load_certificate,
-    select_message_digest,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
     CRYPTOGRAPHY_TIMEZONE,
     cryptography_compare_public_keys,
@@ -36,17 +28,24 @@ from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptograp
     set_not_valid_after,
     set_not_valid_before,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.certificate import (
     CRYPTOGRAPHY_VERSION,
-    CertificateError,
     CertificateBackend,
+    CertificateError,
     CertificateProvider,
 )
-
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    load_certificate,
+    load_privatekey,
+    select_message_digest,
+)
 from ansible_collections.community.crypto.plugins.module_utils.time import (
     get_relative_time_option,
 )
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
+
 
 try:
     import cryptography
@@ -216,7 +215,7 @@ class OwnCACertificateBackendCryptography(CertificateBackend):
                 ext = self.existing_certificate.extensions.get_extension_for_class(x509.AuthorityKeyIdentifier)
                 if ext.value != expected_ext:
                     return True
-            except cryptography.x509.ExtensionNotFound as dummy:
+            except cryptography.x509.ExtensionNotFound:
                 return True
 
         return False

plugins/module_utils/crypto/module_backends/certificate_selfsigned.py

@@ -6,17 +6,14 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
 import os
-
 from random import randrange
 
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    select_message_digest,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
     CRYPTOGRAPHY_TIMEZONE,
     cryptography_key_needs_digest_for_signing,
@@ -27,17 +24,19 @@ from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptograp
     set_not_valid_after,
     set_not_valid_before,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.certificate import (
-    CertificateError,
     CertificateBackend,
+    CertificateError,
     CertificateProvider,
 )
-
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    select_message_digest,
+)
 from ansible_collections.community.crypto.plugins.module_utils.time import (
     get_relative_time_option,
 )
 
+
 try:
     import cryptography
     from cryptography import x509

plugins/module_utils/crypto/module_backends/common.py

@@ -5,12 +5,15 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
 from ansible.module_utils.basic import AnsibleModule
-
-from ansible_collections.community.crypto.plugins.module_utils.argspec import ArgumentSpec as _ArgumentSpec
+from ansible_collections.community.crypto.plugins.module_utils.argspec import (
+    ArgumentSpec as _ArgumentSpec,
+)
 
 
 class ArgumentSpec(_ArgumentSpec):

plugins/module_utils/crypto/module_backends/crl_info.py

@@ -5,29 +5,30 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
 import traceback
 
 from ansible.module_utils.basic import missing_required_lib
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
-    cryptography_oid_to_name,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_crl import (
     TIMESTAMP_FORMAT,
     cryptography_decode_revoked_certificate,
     cryptography_dump_revoked,
     cryptography_get_signature_algorithm_oid_from_crl,
 )
-
+from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
+    cryptography_oid_to_name,
+)
 from ansible_collections.community.crypto.plugins.module_utils.crypto.pem import (
     identify_pem_format,
 )
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
+
 
 # crypto_utils
 

plugins/module_utils/crypto/module_backends/csr.py

@@ -6,6 +6,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -16,39 +18,36 @@ import traceback
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
 from ansible.module_utils.common.text.converters import to_native, to_text
-
-from ansible_collections.community.crypto.plugins.module_utils.argspec import ArgumentSpec
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
-    OpenSSLObjectError,
-    OpenSSLBadPassphraseError,
+from ansible_collections.community.crypto.plugins.module_utils.argspec import (
+    ArgumentSpec,
+)
+from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
+    OpenSSLBadPassphraseError,
+    OpenSSLObjectError,
+)
+from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_crl import (
+    REVOCATION_REASON_MAP,
+)
+from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
+    cryptography_get_basic_constraints,
+    cryptography_get_name,
+    cryptography_key_needs_digest_for_signing,
+    cryptography_name_to_oid,
+    cryptography_parse_key_usage_params,
+    cryptography_parse_relative_distinguished_name,
+)
+from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.csr_info import (
+    get_csr_info,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    load_privatekey,
     load_certificate_request,
+    load_privatekey,
     parse_name_field,
     parse_ordered_name_field,
     select_message_digest,
 )
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
-    cryptography_get_basic_constraints,
-    cryptography_get_name,
-    cryptography_name_to_oid,
-    cryptography_key_needs_digest_for_signing,
-    cryptography_parse_key_usage_params,
-    cryptography_parse_relative_distinguished_name,
-)
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_crl import (
-    REVOCATION_REASON_MAP,
-)
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.csr_info import (
-    get_csr_info,
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
 )
 
 
@@ -57,12 +56,12 @@ MINIMAL_CRYPTOGRAPHY_VERSION = '1.3'
 CRYPTOGRAPHY_IMP_ERR = None
 try:
     import cryptography
-    import cryptography.x509
-    import cryptography.x509.oid
     import cryptography.exceptions
     import cryptography.hazmat.backends
-    import cryptography.hazmat.primitives.serialization
     import cryptography.hazmat.primitives.hashes
+    import cryptography.hazmat.primitives.serialization
+    import cryptography.x509
+    import cryptography.x509.oid
     CRYPTOGRAPHY_VERSION = LooseVersion(cryptography.__version__)
 except ImportError:
     CRYPTOGRAPHY_IMP_ERR = traceback.format_exc()
@@ -178,7 +177,7 @@ class CertificateSigningRequestBackend(object):
                 self.module, self.backend, data, validate_signature=False, prefer_one_fingerprint=True)
             result['can_parse_csr'] = True
             return result
-        except Exception as exc:
+        except Exception:
             return dict(can_parse_csr=False)
 
     @abc.abstractmethod
@@ -225,7 +224,7 @@ class CertificateSigningRequestBackend(object):
             return True
         try:
             self.existing_csr = load_certificate_request(None, content=self.existing_csr_bytes, backend=self.backend)
-        except Exception as dummy:
+        except Exception:
             return True
         self._ensure_private_key_loaded()
         return not self._check_csr()
@@ -343,7 +342,7 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
             try:
                 # This only works with cryptography >= 2.1
                 csr = csr.add_extension(cryptography.x509.TLSFeature([cryptography.x509.TLSFeatureType.status_request]), critical=self.ocspMustStaple_critical)
-            except AttributeError as dummy:
+            except AttributeError:
                 csr = csr.add_extension(
                     cryptography.x509.UnrecognizedExtension(CRYPTOGRAPHY_MUST_STAPLE_NAME, CRYPTOGRAPHY_MUST_STAPLE_VALUE),
                     critical=self.ocspMustStaple_critical
@@ -487,7 +486,7 @@ class CertificateSigningRequestCryptographyBackend(CertificateSigningRequestBack
                 # This only works with cryptography >= 2.1
                 tlsfeature_ext = _find_extension(extensions, cryptography.x509.TLSFeature)
                 has_tlsfeature = True
-            except AttributeError as dummy:
+            except AttributeError:
                 tlsfeature_ext = next(
                     (ext for ext in extensions if ext.value.oid == CRYPTOGRAPHY_MUST_STAPLE_NAME),
                     None

plugins/module_utils/crypto/module_backends/csr_info.py

@@ -7,6 +7,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -17,22 +19,21 @@ import traceback
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
 from ansible.module_utils.common.text.converters import to_native
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    load_certificate_request,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
     cryptography_decode_name,
     cryptography_get_extensions_from_csr,
     cryptography_oid_to_name,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.publickey_info import (
     get_publickey_info,
 )
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    load_certificate_request,
+)
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
+
 
 MINIMAL_CRYPTOGRAPHY_VERSION = '1.3'
 

plugins/module_utils/crypto/module_backends/privatekey.py

@@ -6,6 +6,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -16,33 +18,31 @@ import traceback
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
 from ansible.module_utils.common.text.converters import to_bytes
-
-from ansible_collections.community.crypto.plugins.module_utils.argspec import ArgumentSpec
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
+from ansible_collections.community.crypto.plugins.module_utils.argspec import (
+    ArgumentSpec,
+)
 from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
+    CRYPTOGRAPHY_HAS_ED448,
+    CRYPTOGRAPHY_HAS_ED25519,
+    CRYPTOGRAPHY_HAS_X448,
     CRYPTOGRAPHY_HAS_X25519,
     CRYPTOGRAPHY_HAS_X25519_FULL,
-    CRYPTOGRAPHY_HAS_X448,
-    CRYPTOGRAPHY_HAS_ED25519,
-    CRYPTOGRAPHY_HAS_ED448,
     OpenSSLObjectError,
 )
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    get_fingerprint_of_privatekey,
-)
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.pem import (
-    identify_private_key_format,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.privatekey_info import (
     PrivateKeyConsistencyError,
     PrivateKeyParseError,
     get_privatekey_info,
 )
+from ansible_collections.community.crypto.plugins.module_utils.crypto.pem import (
+    identify_private_key_format,
+)
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    get_fingerprint_of_privatekey,
+)
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
 
 
 MINIMAL_CRYPTOGRAPHY_VERSION = '1.2.3'
@@ -52,11 +52,11 @@ try:
     import cryptography
     import cryptography.exceptions
     import cryptography.hazmat.backends
-    import cryptography.hazmat.primitives.serialization
-    import cryptography.hazmat.primitives.asymmetric.rsa
     import cryptography.hazmat.primitives.asymmetric.dsa
     import cryptography.hazmat.primitives.asymmetric.ec
+    import cryptography.hazmat.primitives.asymmetric.rsa
     import cryptography.hazmat.primitives.asymmetric.utils
+    import cryptography.hazmat.primitives.serialization
     CRYPTOGRAPHY_VERSION = LooseVersion(cryptography.__version__)
 except ImportError:
     CRYPTOGRAPHY_IMP_ERR = traceback.format_exc()
@@ -110,7 +110,7 @@ class PrivateKeyBackend:
             result.update(exc.result)
         except PrivateKeyParseError as exc:
             result.update(exc.result)
-        except Exception as exc:
+        except Exception:
             pass
         return result
 
@@ -206,7 +206,7 @@ class PrivateKeyBackend:
             return get_fingerprint_of_privatekey(self.private_key, backend=self.backend)
         try:
             self._ensure_existing_private_key_loaded()
-        except Exception as dummy:
+        except Exception:
             # Ignore errors
             pass
         if self.existing_private_key:
@@ -218,7 +218,7 @@ class PrivateKeyBackend:
         if not self.private_key:
             try:
                 self._ensure_existing_private_key_loaded()
-            except Exception as dummy:
+            except Exception:
                 # Ignore errors
                 pass
         result = {
@@ -348,7 +348,7 @@ class PrivateKeyCryptographyBackend(PrivateKeyBackend):
                     curve=self.curves[self.curve]['create'](self.size),
                     backend=self.cryptography_backend
                 )
-        except cryptography.exceptions.UnsupportedAlgorithm as dummy:
+        except cryptography.exceptions.UnsupportedAlgorithm:
             self.module.fail_json(msg='Cryptography backend does not support the algorithm required for {0}'.format(self.type))
 
     def get_private_key_data(self):
@@ -383,11 +383,11 @@ class PrivateKeyCryptographyBackend(PrivateKeyBackend):
                 format=export_format,
                 encryption_algorithm=encryption_algorithm
             )
-        except ValueError as dummy:
+        except ValueError:
             self.module.fail_json(
                 msg='Cryptography backend cannot serialize the private key in the required format "{0}"'.format(self.format)
             )
-        except Exception as dummy:
+        except Exception:
             self.module.fail_json(
                 msg='Error while serializing the private key in the required format "{0}"'.format(self.format),
                 exception=traceback.format_exc()
@@ -443,7 +443,7 @@ class PrivateKeyCryptographyBackend(PrivateKeyBackend):
                     None if self.passphrase is None else to_bytes(self.passphrase),
                     backend=self.cryptography_backend
                 )
-        except Exception as dummy:
+        except Exception:
             return False
 
     def _check_size_and_type(self):
@@ -474,7 +474,7 @@ class PrivateKeyCryptographyBackend(PrivateKeyBackend):
         try:
             format = identify_private_key_format(self.existing_private_key_bytes)
             return format == self._get_wanted_format()
-        except Exception as dummy:
+        except Exception:
             return False
 
 

plugins/module_utils/crypto/module_backends/privatekey_convert.py

@@ -5,6 +5,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -14,30 +16,26 @@ import traceback
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
 from ansible.module_utils.common.text.converters import to_bytes
-
-from ansible_collections.community.crypto.plugins.module_utils.argspec import ArgumentSpec
-
-from ansible_collections.community.crypto.plugins.module_utils.io import (
-    load_file,
+from ansible_collections.community.crypto.plugins.module_utils.argspec import (
+    ArgumentSpec,
 )
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
-    CRYPTOGRAPHY_HAS_X25519,
-    CRYPTOGRAPHY_HAS_X448,
-    CRYPTOGRAPHY_HAS_ED25519,
     CRYPTOGRAPHY_HAS_ED448,
+    CRYPTOGRAPHY_HAS_ED25519,
+    CRYPTOGRAPHY_HAS_X448,
+    CRYPTOGRAPHY_HAS_X25519,
     OpenSSLObjectError,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.cryptography_support import (
     cryptography_compare_private_keys,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.pem import (
     identify_private_key_format,
 )
+from ansible_collections.community.crypto.plugins.module_utils.io import load_file
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
 
 
 MINIMAL_CRYPTOGRAPHY_VERSION = '1.2.3'
@@ -47,11 +45,11 @@ try:
     import cryptography
     import cryptography.exceptions
     import cryptography.hazmat.backends
-    import cryptography.hazmat.primitives.serialization
-    import cryptography.hazmat.primitives.asymmetric.rsa
     import cryptography.hazmat.primitives.asymmetric.dsa
     import cryptography.hazmat.primitives.asymmetric.ec
+    import cryptography.hazmat.primitives.asymmetric.rsa
     import cryptography.hazmat.primitives.asymmetric.utils
+    import cryptography.hazmat.primitives.serialization
     CRYPTOGRAPHY_VERSION = LooseVersion(cryptography.__version__)
 except ImportError:
     CRYPTOGRAPHY_IMP_ERR = traceback.format_exc()
@@ -163,11 +161,11 @@ class PrivateKeyConvertCryptographyBackend(PrivateKeyConvertBackend):
                 format=export_format,
                 encryption_algorithm=encryption_algorithm
             )
-        except ValueError as dummy:
+        except ValueError:
             self.module.fail_json(
                 msg='Cryptography backend cannot serialize the private key in the required format "{0}"'.format(self.format)
             )
-        except Exception as dummy:
+        except Exception:
             self.module.fail_json(
                 msg='Error while serializing the private key in the required format "{0}"'.format(self.format),
                 exception=traceback.format_exc()

plugins/module_utils/crypto/module_backends/privatekey_info.py

@@ -7,6 +7,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -15,29 +17,26 @@ import traceback
 
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
-from ansible.module_utils.common.text.converters import to_native, to_bytes
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
+from ansible.module_utils.common.text.converters import to_bytes, to_native
 from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
-    CRYPTOGRAPHY_HAS_ED25519,
     CRYPTOGRAPHY_HAS_ED448,
+    CRYPTOGRAPHY_HAS_ED25519,
     OpenSSLObjectError,
 )
-
-from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
-    load_privatekey,
-    get_fingerprint_of_bytes,
-)
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.math import (
     binary_exp_mod,
     quick_is_not_prime,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.module_backends.publickey_info import (
     _get_cryptography_public_key_info,
 )
+from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
+    get_fingerprint_of_bytes,
+    load_privatekey,
+)
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
 
 
 MINIMAL_CRYPTOGRAPHY_VERSION = '1.2.3'

plugins/module_utils/crypto/module_backends/publickey_info.py

@@ -5,6 +5,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -14,21 +16,20 @@ import traceback
 from ansible.module_utils import six
 from ansible.module_utils.basic import missing_required_lib
 from ansible.module_utils.common.text.converters import to_native
-
-from ansible_collections.community.crypto.plugins.module_utils.version import LooseVersion
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
-    CRYPTOGRAPHY_HAS_X25519,
-    CRYPTOGRAPHY_HAS_X448,
-    CRYPTOGRAPHY_HAS_ED25519,
     CRYPTOGRAPHY_HAS_ED448,
+    CRYPTOGRAPHY_HAS_ED25519,
+    CRYPTOGRAPHY_HAS_X448,
+    CRYPTOGRAPHY_HAS_X25519,
     OpenSSLObjectError,
 )
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.support import (
     get_fingerprint_of_bytes,
     load_publickey,
 )
+from ansible_collections.community.crypto.plugins.module_utils.version import (
+    LooseVersion,
+)
 
 
 MINIMAL_CRYPTOGRAPHY_VERSION = '1.2.3'