diff --git a/add_collaborators.py b/add_collaborators.py
index 633f969..0cf9dce 100755
--- a/add_collaborators.py
+++ b/add_collaborators.py
@@ -43,18 +43,15 @@ def add_collaborators_deco(parser):
 
 def add_collaborators(opt):
     g = Github(opt.githubToken())
-    repo_full_name = '{}/{}'.format(opt.owner, opt.repo)
+    repo_full_name = f'{opt.owner}/{opt.repo}'
     repo = g.get_repo(repo_full_name)
 
-    if not opt.promptYes(('Are you sure you would like to add users from {} '
-                            'as collaborators to {} with {} permissions?')
-                            .format(opt.users.name, repo_full_name,
-                                opt.permission), True):
+    if not opt.promptYes((f'Are you sure you would like to add users from {opt.users.name} '
+                            f'as collaborators to {repo_full_name} with {opt.permission} permissions?'), True):
         opt.warn('Aborting')
         return 
 
-    opt.info('Proceeding to add {} as collaborators to {} with {} permissions'
-            .format(opt.users.name, repo_full_name, opt.permission))
+    opt.info(f'Proceeding to add {opt.users.name} as collaborators to {repo_full_name} with {opt.permission} permissions'
 
     do_add = opt.begin is None
     begin, added, total = 0, 0, 0
@@ -71,15 +68,14 @@ def add_collaborators(opt):
                 do_add_collaborator(repo, user, opt.permission, opt)
                 added = added + 1
             else:
-                opt.info('Skipped {}'.format(user))
+                opt.info(f'Skipped {user}')
 
         except Exception as e:
             opt.error(e)
-            opt.error('{} failed on {} ({})'.format(CMD_NAME, user, total))
+            opt.error(f'{CMD_NAME} failed on {user} ({total})')
             return
 
-    opt.info('Added {} users of {} total users, starting from index {}'
-            .format(added, total, begin))
+    opt.info(f'Added {added} users of {total} total users, starting from index {begin}')
 
 
 def main(args=None, config_path=None):
diff --git a/add_team_members.py b/add_team_members.py
index 4c63523..3593f53 100755
--- a/add_team_members.py
+++ b/add_team_members.py
@@ -48,7 +48,7 @@ def add_team_members_deco(parser):
 
 
 def do_create_team(org, team_name, opt):
-    opt.info('Creating secret team {} in org {}'.format(team_name, org.name))
+    opt.info(f'Creating secret team {team_name} in org {org.name}')
 
     if opt.noop:
         opt.log('--noop option specified; not creating team')
@@ -58,14 +58,13 @@ def do_create_team(org, team_name, opt):
 
     team = org.create_team(team_name, privacy='secret')
 
-    opt.info('Team {} successfully created'.format(team.name))
+    opt.info(f'Team {team.name} successfully created')
 
     return team
 
 
 def do_add_team_member(team, user, role, opt):
-    opt.info('Adding {} as team member to {} with {} permissions'
-            .format(user.login, team.name, role))
+    opt.info(f'Adding {user.login} as team member to {team.name} with {role} permissions')
 
     if opt.noop:
         opt.log('--noop option specified; not adding team member')
@@ -73,7 +72,7 @@ def do_add_team_member(team, user, role, opt):
 
     team.add_membership(user, role=role)
 
-    opt.info('User {} successfully added'.format(user.login))
+    opt.info(f'User {user.login} successfully added')
 
 
 def add_team_members(opt):
@@ -96,12 +95,11 @@ def add_team_members(opt):
                 break
 
     if team is None:
-        opt.error('Team {} not found in org {}'.format(opt.team, opt.org))
+        opt.error(f'Team {opt.team} not found in org {opt.org}')
         opt.error('You may try passing the --create flag to create it')
         return
 
-    opt.info('Adding users from {} as team members to {}/{} with {} permissions'
-            .format(opt.users.name, org.name, team.name, opt.role))
+    opt.info(f'Adding users from {opt.users.name} as team members to {org.name}/{team.name} with {opt.role} permissions')
 
     if not opt.promptYes('Are you sure you would like to proceed?', True):
         opt.warn('Aborting')
diff --git a/boatswain_env.py b/boatswain_env.py
index e6da2ad..a808259 100755
--- a/boatswain_env.py
+++ b/boatswain_env.py
@@ -71,7 +71,7 @@ def log(self, fmt, *args, tag=None):
         if len(args) > 0:
             fmt = fmt.format(*args)
         if tag is not None:
-            fmt = '=={}==\t{}'.format(tag, fmt)
+            fmt = f'=={tag}==\t{fmt}'
 
         # TODO: logging to file
         print(fmt)
@@ -183,9 +183,9 @@ def ParseOption(
             )
         except configparser.NoOptionError:
             print('[WARN]: You appear to be missing a Canvas token in your '
-                + 'Boatswain configuration ({}). Please add this information '
+                + f'Boatswain configuration ({config_path}). Please add this information '
                 + 'to your config file under section [canvas] with key "token".'
-                + '\n'.format(config_path))
+                + '\n')
             parser.add_argument('canvas_token',
                                 type=str,
                                 help='Canvas LMS auth token',
@@ -202,9 +202,9 @@ def ParseOption(
             )
         except configparser.NoOptionError:
             print('[WARN]: You appear to be missing the Canvas URL in your '
-                + 'Boatswain configuration ({}). Please add this information '
+                + f'Boatswain configuration ({config_path}). Please add this information '
                 + 'to your config file under section [canvas] with key "url".'
-                + '\n'.format(config_path))
+                + '\n')
             parser.add_argument('canvas_url',
                                 type=str,
                                 help='Canvas LMS URL',
@@ -222,9 +222,9 @@ def ParseOption(
             )
         except configparser.NoOptionError:
             print('[WARN]: You appear to be missing a GitHub token in your '
-                + 'Boatswain configuration ({}). Please add this information '
+                + f'Boatswain configuration ({config_path}). Please add this information '
                 + 'to your config file under section [github] with key "token".'
-                + '\n'.format(config_path))
+                + '\n')
             parser.add_argument('github_token',
                                 type=str,
                                 help='GitHub auth token',
@@ -299,7 +299,7 @@ def createConfigInteractive():
         config = newPopulatedConfigInteractive()
         config.write(open(path, 'w+'))
 
-        itv.output('Boatswain config file created at {}'.format(path))
+        itv.output(f'Boatswain config file created at {path}')
 
     except EOFError:
         itv.output()
diff --git a/canvas-wrangler.py b/canvas-wrangler.py
index c36b6f3..565942c 100755
--- a/canvas-wrangler.py
+++ b/canvas-wrangler.py
@@ -55,7 +55,7 @@ def retrieve_index(header_row, target):
     for i, cell in enumerate(header_row):
         if cell == target:
             return i
-    raise LookupError('{} index not found'.format(target))
+    raise LookupError(f'{target} index not found')
 
 
 def retrieve_indices(header, opt):
@@ -103,18 +103,18 @@ def build_grade_data(grades, student_i, grade_i, comment_i, opt):
         else:
             comment = None
 
-        opt.info('{} ({}): {}'.format(user_id, grade, comment))
-        grade_data['sis_user_id:{}'.format(user_id)] = grade_entry
+        opt.info(f'{user_id} ({grade}): {comment}')
+        grade_data[f'sis_user_id:{user_id}'] = grade_entry
 
     return grade_data
 
 
 def log_dump_wrangler(grade_data, course, assignment, opt):
-    opt.info('Course: {}'.format(course))
-    opt.info('Assignment: {}'.format(assignment))
+    opt.info(f'Course: {course}')
+    opt.info(f'Assignment: {assignment}')
     opt.info('Grade Data: {')
     for k in grade_data:
-        opt.info('{} : {}'.format(k, grade_data[k]))
+        opt.info(f'{k} : {grade_data[k]}')
     opt.info('}')
     opt.info('')
 
diff --git a/interactive.py b/interactive.py
index 9818b58..6792faa 100644
--- a/interactive.py
+++ b/interactive.py
@@ -7,13 +7,13 @@ def output(*args):
 
 def promptInput(prompt, fmt='', default=''):
     if fmt != '':
-        promptf = '{} [{}]'.format(prompt, fmt)
+        promptf = f'{prompt} [{fmt}]'
     elif default != '':
-        promptf = '{} [{}]'.format(prompt, default)
+        promptf = f'{prompt} [{default}]'
     else:
         promptf = prompt
 
-    promptf = '{}: '.format(promptf)
+    promptf = '{promptf}: '
 
     while True:
         inp = input(promptf)
@@ -31,7 +31,7 @@ def promptValidate(prompt, validator, fmt='', default=''):
         v = validator(inp)
         if v == '':
             return inp
-        output('Invalid input (case-insensitive): {}'.format(v))
+        output(f'Invalid input (case-insensitive): {v}')
 
 
 def selectorValidator(options, default=''):
@@ -70,7 +70,7 @@ def newFileValidator():
     def validator(inp):
         try:
             if os.path.exists(inp):
-                return '{} already exists'.format(inp)
+                return f'{inp} already exists'
             else:
                 open(inp, 'w').close()
                 os.unlink(inp)
diff --git a/mk_group_repos.py b/mk_group_repos.py
index b0bbd68..e042f79 100755
--- a/mk_group_repos.py
+++ b/mk_group_repos.py
@@ -49,16 +49,12 @@ def mk_group_repos(opt):
     org = g.get_organization(opt.org)
 
     if not opt.promptYes(('Are you sure you would like to create group repos '
-                            'for users in {} under org {} with name {}')
-                            .format(opt.groups.name, opt.org,
-                                fmt_hyphen(opt.prefix, '<group>')),
+                            f'for users in {opt.groups.name} under org {opt.org} with name {fmt_hyphen(opt.prefix, '<group>')}'),
                         True):
         opt.warn('Aborting')
         return
 
-    opt.info('Creating repos under {} for groups in {}, with name {}'
-            .format(opt.groups.name, opt.org,
-                fmt_hyphen(opt.prefix, '<group>')))
+    opt.info(f'Creating repos under {opt.groups.name} for groups in {opt.org}, with name {fmt_hyphen(opt.prefix, '<group>')}')
 
     for g in csv.reader(opt.groups):
         group, members = g[0], [m.strip() for m in g[1:] if m != '']
@@ -69,19 +65,18 @@ def mk_group_repos(opt):
             action = 'creating'
         else:
             action = 'looking up'
-        opt.info('{} {}/{} and adding members {}'
-                .format(action, opt.org, repo_name, members))
+        opt.info(f'{action} {opt.org}/{repo_name} and adding members {members}')
 
         if opt.create:
             repo = do_mk_repo(org, repo_name, opt)
         else:
             repo = org.get_repo(repo_name)
-            opt.info('Looked up repo {}/{}'.format(org.name, repo_name))
+            opt.info(f'Looked up repo {org.name}/{repo_name}')
 
         if opt.permission == 'none':
-            opt.info('Not adding {} to {}'.format(members, repo_name))
+            opt.info(f'Not adding {members} to {repo_name}')
         else:
-            opt.info('Adding {} to {}'.format(members, repo_name))
+            opt.info(f'Adding {members} to {repo_name}')
             for member in members:
                 do_add_collaborator(repo, member, opt.permission, opt)
 
diff --git a/mk_repo.py b/mk_repo.py
index 4be1c1b..e076bd7 100755
--- a/mk_repo.py
+++ b/mk_repo.py
@@ -31,14 +31,13 @@ def mk_repo_deco(parser):
 
 def fmt_hyphen(prefix, name):
     if prefix[-1] == '-':
-        return '{}{}'.format(prefix, name)
+        return f'{prefix}{name}'
     else:
-        return '{}-{}'.format(prefix, name)
+        return f'{prefix}-{name}'
 
 
 def do_mk_repo(org, repo_name, opt):
-    opt.info('Creating private repo {} under organization {}'
-            .format(repo_name, org))
+    opt.info(f'Creating private repo {repo_name} under organization {org}')
     
     if opt.noop:
         opt.log('--noop option specified; not creating repo')
@@ -49,7 +48,7 @@ def do_mk_repo(org, repo_name, opt):
     repo = org.create_repo(repo_name, private=True)
 
     # funky output so easily greppable
-    opt.log('@CREATED_REPO: {} {}'.format(repo_name, repo.git_url))
+    opt.log(f'@CREATED_REPO: {repo_name} {repo.git_url}')
 
     return repo
 
@@ -61,14 +60,12 @@ def mk_repo(opt):
     repo_name = fmt_hyphen(opt.prefix, opt.repo)
 
     if not opt.promptYes(('Are you sure you would like to create a private '
-                            'repo under organization {} named {}?')
-                            .format(opt.org, repo_name),
+                            f'repo under organization {opt.org} named {repo_name}?'),
                             True):
         opt.warn('Aborting')
         return 
 
-    opt.info('Proceeding to create private repo {}/{}'
-            .format(opt.org, repo_name))
+    opt.info(f'Proceeding to create private repo {opt.org}/{repo_name}')
 
     do_mk_repo(org, repo_name, opt)
 
diff --git a/scrub-deck.py b/scrub-deck.py
index 457119e..70c571c 100755
--- a/scrub-deck.py
+++ b/scrub-deck.py
@@ -32,10 +32,10 @@ def scrub_deco(parser):
 
 def do_scrub(repo, opt):
     if opt.noop:
-        opt.log('--noop option specified; not deleting {}'.format(repo.name))
+        opt.log(f'--noop option specified; not deleting {repo.name}')
         return
 
-    opt.warn('Deleting {}...'.format(repo.name))
+    opt.warn(f'Deleting {repo.name}...')
     repo.delete()
 
 
@@ -43,7 +43,7 @@ def scrub_org(opt):
     g = Github(opt.githubToken())
     org = g.get_organization(opt.org_name)
 
-    opt.warn('Scrubbing Github Org: {} ({})'.format(org.login, org.url))
+    opt.warn(f'Scrubbing Github Org: {org.login} ({org.url})')
 
     if not opt.promptYes('Are you sure you want to scrub this org?', False):
         # deliberately disallow --yes to work
@@ -58,13 +58,11 @@ def scrub_org(opt):
         repo_name = repo.full_name.split('/')[-1]
         if opt.invert:
             if opt.filter.fullmatch(repo_name):
-                opt.info('Skipping {}; matched with inverted filter: {}'
-                        .format(repo_name, opt.filter))
+                opt.info(f'Skipping {repo_name}; matched with inverted filter: {opt.filter}')
                 continue
         else:
             if not opt.filter.fullmatch(repo_name):
-                opt.info('Skipping {}; did not match with filter: {}'
-                        .format(repo_name, opt.filter))
+                opt.info(f'Skipping {repo_name}; did not match with filter: {opt.filter}')
                 continue
 
         do_scrub(repo, opt)