diff --git a/tqdm/notebook.py b/tqdm/notebook.py
index e0840b3f..c4fbe19c 100644
--- a/tqdm/notebook.py
+++ b/tqdm/notebook.py
@@ -265,7 +265,7 @@ class tqdm_notebook(std_tqdm):
             else:
                 self.sp(close=True)
 
-    def moveto(self, *args, **kwargs):
+    def moveto(self, *_, **__):
         # void -> avoid extraneous `\n` in IPython output cell
         return
 
diff --git a/tqdm/std.py b/tqdm/std.py
index f724af70..8bd9be9b 100644
--- a/tqdm/std.py
+++ b/tqdm/std.py
@@ -147,7 +147,7 @@ class Bar(object):
                    CYAN='\x1b[36m', WHITE='\x1b[37m')
 
     def __init__(self, frac, default_len=10, charset=UTF, colour=None):
-        if not (0 <= frac <= 1):
+        if not 0 <= frac <= 1:
             warn("clamping frac to range [0, 1]", TqdmWarning, stacklevel=2)
             frac = max(0, min(1, frac))
         assert default_len > 0
@@ -202,16 +202,11 @@ class Bar(object):
         bar_length, frac_bar_length = divmod(
             int(self.frac * N_BARS * nsyms), nsyms)
 
-        bar = charset[-1] * bar_length
-        frac_bar = charset[frac_bar_length]
-
-        # whitespace padding
-        if bar_length < N_BARS:
-            bar = bar + frac_bar + \
+        res = charset[-1] * bar_length
+        if bar_length < N_BARS:  # whitespace padding
+            res = res + charset[frac_bar_length] + \
                 charset[0] * (N_BARS - bar_length - 1)
-        if self.colour:
-            return self.colour + bar + self.COLOUR_RESET
-        return bar
+        return self.colour + res + self.COLOUR_RESET if self.colour else res
 
 
 class tqdm(Comparable):
@@ -546,7 +541,7 @@ class tqdm(Comparable):
                 '{0}{1} [{2}, {3}{4}]'.format(
                     n_fmt, unit, elapsed_str, rate_fmt, postfix)
 
-    def __new__(cls, *args, **kwargs):
+    def __new__(cls, *args, **_):
         # Create a new instance
         instance = object.__new__(cls)
         # Construct the lock if it does not exist
diff --git a/tqdm/tests/tests_perf.py b/tqdm/tests/tests_perf.py
index 3182dabd..b3ab12e3 100644
--- a/tqdm/tests/tests_perf.py
+++ b/tqdm/tests/tests_perf.py
@@ -89,7 +89,7 @@ def retry_on_except(n=3):
 class MockIO(StringIO):
     """Wraps StringIO to mock a file with no I/O"""
 
-    def write(self, data):
+    def write(self, _):
         return
 
 
@@ -132,15 +132,15 @@ def simple_progress(iterable=None, total=None, file=sys.stdout, desc='',
                 eta = (total - n[0]) / rate if rate > 0 else 0
                 eta_fmt = format_interval(eta)
 
-                # bar = "#" * int(frac * width)
+                # full_bar = "#" * int(frac * width)
                 barfill = " " * int((1.0 - frac) * width)
                 bar_length, frac_bar_length = divmod(int(frac * width * 10), 10)
-                bar = '#' * bar_length
+                full_bar = '#' * bar_length
                 frac_bar = chr(48 + frac_bar_length) if frac_bar_length \
                     else ' '
 
                 file.write("\r%s %i%%|%s%s%s| %i/%i [%s<%s, %s]" %
-                           (desc, percentage, bar, frac_bar, barfill, n[0],
+                           (desc, percentage, full_bar, frac_bar, barfill, n[0],
                             total, spent_fmt, eta_fmt, rate_fmt))
 
                 if n[0] == total and leave:
diff --git a/tqdm/tests/tests_tqdm.py b/tqdm/tests/tests_tqdm.py
index 42f01962..45b701f3 100644
--- a/tqdm/tests/tests_tqdm.py
+++ b/tqdm/tests/tests_tqdm.py
@@ -969,14 +969,14 @@ def test_ascii():
     assert u"20%|\u2588\u2588" in res[3]
 
     # Test custom bar
-    for ascii in [" .oO0", " #"]:
+    for bars in [" .oO0", " #"]:
         with closing(StringIO()) as our_file:
-            for _ in tqdm(_range(len(ascii) - 1), file=our_file, miniters=1,
-                          mininterval=0, ascii=ascii, ncols=27):
+            for _ in tqdm(_range(len(bars) - 1), file=our_file, miniters=1,
+                          mininterval=0, ascii=bars, ncols=27):
                 pass
             res = our_file.getvalue().strip("\r").split("\r")
-        for bar, line in zip(ascii, res):
-            assert '|' + bar + '|' in line
+        for b, line in zip(bars, res):
+            assert '|' + b + '|' in line
 
 
 @with_setup(pretest, posttest)
@@ -1170,7 +1170,8 @@ Use `position` instead for manual control.""" not in our_file.getvalue():
 def test_bar_format():
     """Test custom bar formatting"""
     with closing(StringIO()) as our_file:
-        bar_format = r'{l_bar}{bar}|{n_fmt}/{total_fmt}-{n}/{total}{percentage}{rate}{rate_fmt}{elapsed}{remaining}'  # NOQA
+        bar_format = ('{l_bar}{bar}|{n_fmt}/{total_fmt}-{n}/{total}'
+                      '{percentage}{rate}{rate_fmt}{elapsed}{remaining}')
         for _ in trange(2, file=our_file, leave=True, bar_format=bar_format):
             pass
         out = our_file.getvalue()
@@ -1654,7 +1655,7 @@ def test_deprecation_exception():
                 our_file, 'write', sys.stderr.write)))
 
     def test_TqdmDeprecationWarning_nofpwrite():
-        raise (TqdmDeprecationWarning('Test!', fp_write=None))
+        raise TqdmDeprecationWarning('Test!', fp_write=None)
 
     assert_raises(TqdmDeprecationWarning, test_TqdmDeprecationWarning)
     assert_raises(Exception, test_TqdmDeprecationWarning_nofpwrite)
@@ -1878,7 +1879,7 @@ def test_wrapattr():
             res = writer.getvalue()
             assert data == res
         res = our_file.getvalue()
-        assert ('%.1fB [' % len(data)) in res
+        assert '%.1fB [' % len(data) in res
 
     with closing(StringIO()) as our_file:
         with closing(StringIO()) as writer:
@@ -1886,7 +1887,7 @@ def test_wrapattr():
                     writer, "write", file=our_file, bytes=False) as wrap:
                 wrap.write(data)
         res = our_file.getvalue()
-        assert ('%dit [' % len(data)) in res
+        assert '%dit [' % len(data) in res
 
 
 @with_setup(pretest, posttest)