update code to reflect the new minimum python version 3.7

- update string format method
- remove redundant default arguments from function  calls
- remove unused imports
- remove unicode identifier from strings, it's default in py3 (see: https://stackoverflow.com/a/4182635/12201331)

allianceauth/eveonline/evelinks/eveimageserver.py

@@ -56,15 +56,15 @@ def _eve_entity_image_url(
     tenants = ['tranquility', 'singularity']
 
     if not entity_id:
-        raise ValueError('Invalid entity_id: {}'.format(entity_id))
+        raise ValueError(f'Invalid entity_id: {entity_id}')
     else:
         entity_id = int(entity_id)
 
     if not size or size < 32 or size > 1024 or (size & (size - 1) != 0):
-        raise ValueError('Invalid size: {}'.format(size))
+        raise ValueError(f'Invalid size: {size}')
 
     if category not in categories:
-        raise ValueError('Invalid category {}'.format(category))
+        raise ValueError(f'Invalid category {category}')
     else:
         endpoint = categories[category]['endpoint']
 
@@ -78,7 +78,7 @@ def _eve_entity_image_url(
         variant = categories[category]['variants'][0]
 
     if tenant and tenant not in tenants:
-        raise ValueError('Invalid tenant {}'.format(tenant))
+        raise ValueError(f'Invalid tenant {tenant}')
 
     # compose result URL
     result = '{}/{}/{}/{}?size={}'.format(
@@ -89,7 +89,7 @@ def _eve_entity_image_url(
         size
     )
     if tenant:
-        result += '&tenant={}'.format(tenant)
+        result += f'&tenant={tenant}'
 
     return result
 

allianceauth/eveonline/evelinks/evewho.py

@@ -31,7 +31,7 @@ def _build_url(category: str, eve_id: int) -> str:
 
     url = urljoin(
         _BASE_URL,
-        '{}/{}'.format(partial, int(eve_id))
+        f'{partial}/{int(eve_id)}'
     )
     return url
 

allianceauth/eveonline/evelinks/zkillboard.py

@@ -39,7 +39,7 @@ def _build_url(category: str, eve_id: int) -> str:
 
     url = urljoin(
         _BASE_URL,
-        '{}/{}/'.format(partial, int(eve_id))
+        f'{partial}/{int(eve_id)}/'
     )
     return url