Travis CI: Don’t allow bare exceptions (#1734)

* Travis CI: Don’t allow bare exceptions

* fixup! Format Python code with psf/black push

* except IOError:

* except IOError:

* Update hamming_code.py

* IndexError

* Get rid of the nonsense logic

Co-authored-by: John Law <johnlaw.po@gmail.com>

.travis.yml

@@ -5,7 +5,7 @@ before_install: pip install --upgrade pip setuptools
 install: pip install -r requirements.txt
 before_script:
   - black --check . || true
-  - flake8 . --count --select=E101,E9,F4,F63,F7,F82,W191 --show-source --statistics
+  - flake8 . --count --select=E101,E722,E9,F4,F63,F7,F82,W191 --show-source --statistics
   - flake8 . --count --exit-zero --max-line-length=127 --statistics
 script:
   - scripts/validate_filenames.py  # no uppercase, no spaces, in a directory

ciphers/transposition_cipher.py

@@ -1,11 +1,13 @@
 import math
 
-'''
+"""
 In cryptography, the TRANSPOSITION cipher is a method of encryption where the
 positions of plaintext are shifted a certain number(determined by the key) that
 follows a regular system that results in the permuted text, known as the encrypted
 text. The type of transposition cipher demonstrated under is the ROUTE cipher.
-'''
+"""
+
+
 def main():
     message = input("Enter message: ")
     key = int(input("Enter key [2-%s]: " % (len(message) - 1)))

ciphers/xor_cipher.py

@@ -148,7 +148,7 @@ class XORCipher:
                     for line in fin:
                         fout.write(self.encrypt_string(line, key))
 
-        except:
+        except IOError:
             return False
 
         return True
@@ -173,7 +173,7 @@ class XORCipher:
                     for line in fin:
                         fout.write(self.decrypt_string(line, key))
 
-        except:
+        except IOError:
             return False
 
         return True

hashes/hamming_code.py

@@ -125,7 +125,7 @@ def emitterConverter(sizePar, data):
             if x != None:
                 try:
                     aux = (binPos[contLoop])[-1 * (bp)]
-                except:
+                except IndexError:
                     aux = "0"
                 if aux == "1":
                     if x == "1":
@@ -229,7 +229,7 @@ def receptorConverter(sizePar, data):
             if x != None:
                 try:
                     aux = (binPos[contLoop])[-1 * (bp)]
-                except:
+                except IndexError:
                     aux = "0"
                 if aux == "1":
                     if x == "1":

linear_algebra/src/test_linear_algebra.py

@@ -19,11 +19,7 @@ class Test(unittest.TestCase):
         x = Vector([1, 2, 3])
         self.assertEqual(x.component(0), 1)
         self.assertEqual(x.component(2), 3)
-        try:
-            y = Vector()
-            self.assertTrue(False)
-        except:
-            self.assertTrue(True)
+        y = Vector()
 
     def test_str(self):
         """