Style

relational/maintenance.py

@@ -95,7 +95,7 @@ class UserInterface (object):
         as bytes.
         '''
         if filename:
-            with open(filename,'w') as f:
+            with open(filename, 'w') as f:
                 pickle.dump(self.relations, f)
                 return None
         return pickle.dumps(self.relations)

relational/optimizations.py

@@ -508,6 +508,7 @@ def select_union_intersect_subtract(n):
 
     return changes + recoursive_scan(select_union_intersect_subtract, n)
 
+
 def union_and_product(n):
     '''
     A * B ∪ A * C = A * (B ∪ C)

relational/parser.py

@@ -341,11 +341,12 @@ def tokenize(expression):
             expression = expression[
                 par:].strip()  # Removing parameter from the expression
         else:  # Relation (hopefully)
-            expression+=' ' #To avoid the special case of the ending
+            expression += ' '  # To avoid the special case of the ending
 
-            #Initial part is a relation, stop when the name of the relation is over
-            for r in range(1,len(expression)):
-                if rtypes.RELATION_NAME_REGEXP.match(expression[:r+1]) is None:
+            # Initial part is a relation, stop when the name of the relation is
+            # over
+            for r in range(1, len(expression)):
+                if rtypes.RELATION_NAME_REGEXP.match(expression[:r + 1]) is None:
                     break
             items.append(expression[:r])
             expression = expression[r:].strip()
@@ -371,5 +372,5 @@ if __name__ == "__main__":
         e = input("Expression: ")
         print (parse(e))
 
-#Backwards compatibility
+# Backwards compatibility
 node = Node

relational/relation.py

@@ -64,6 +64,7 @@ class Relation (object):
             self.header = Header(next(reader))  # read 1st line
             iterator = ((self.insert(i) for i in reader))
             deque(iterator, maxlen=0)
+
     def _make_duplicate(self, copy):
         '''Flag that the relation "copy" is pointing
         to the same set as this relation.'''
@@ -393,7 +394,7 @@ class Relation (object):
         m_len = [len(i) for i in self.header]  # Maximum lenght string
 
         for f in self.content:
-            for col,i in enumerate(f):
+            for col, i in enumerate(f):
                 if len(i) > m_len[col]:
                     m_len[col] = len(i)
 
@@ -403,7 +404,7 @@ class Relation (object):
 
         for r in self.content:
             res += "\n"
-            for col,i in enumerate(r):
+            for col, i in enumerate(r):
                 res += "%s" % (i.ljust(2 + m_len[col]))
 
         return res
@@ -426,12 +427,14 @@ class Relation (object):
         affected = self.selection(expr)
         not_affected = self.difference(affected)
 
-        new_values = tuple(zip(self.header.getAttributesId(dic.keys()), dic.values()))
+        new_values = tuple(
+            zip(self.header.getAttributesId(dic.keys()), dic.values())
+        )
 
         for i in set(affected.content):
             i = list(i)
 
-            for column,value in new_values:
+            for column, value in new_values:
                 i[column] = value
             not_affected.insert(i)
 
@@ -530,6 +533,6 @@ class Header(tuple):
         '''Returns a list with numeric index corresponding to field's name'''
         return [self.index(i) for i in param]
 
-#Backwards compatibility
+# Backwards compatibility
 relation = Relation
 header = Header

relational/rtypes.py

@@ -32,7 +32,9 @@ class Rstring (str):
 
     int_regexp = re.compile(r'^[\+\-]{0,1}[0-9]+$')
     float_regexp = re.compile(r'^[\+\-]{0,1}[0-9]+(\.([0-9])+)?$')
-    date_regexp = re.compile(r'^([0-9]{1,4})(\\|-|/)([0-9]{1,2})(\\|-|/)([0-9]{1,2})$')
+    date_regexp = re.compile(
+        r'^([0-9]{1,4})(\\|-|/)([0-9]{1,2})(\\|-|/)([0-9]{1,2})$'
+    )
 
     def autocast(self):
         '''
@@ -155,11 +157,12 @@ class Rdate (object):
     def __sub__(self, other):
         return (self.intdate - other.intdate).days
 
+
 def is_valid_relation_name(name):
     '''Checks if a name is valid for a relation.
     Returns boolean'''
     return re.match(RELATION_NAME_REGEXP, name) != None
 
-#Backwards compatibility
+# Backwards compatibility
 rdate = Rdate
 rstring = Rstring

relational_gui/guihandler.py

@@ -43,7 +43,7 @@ class relForm(QtWidgets.QMainWindow):
         # Creates the UI
         self.ui.setupUi(self)
 
-        #Setting fonts for symbols
+        # Setting fonts for symbols
         f = QtGui.QFont()
         size = f.pointSize()
         if sys.platform.startswith('win'):
@@ -106,7 +106,6 @@ class relForm(QtWidgets.QMainWindow):
             action.setShortcutContext(0)
             widget.addAction(action)
 
-
     def checkVersion(self):
         from relational import maintenance
         online = maintenance.check_latest_version()
@@ -250,8 +249,11 @@ class relForm(QtWidgets.QMainWindow):
                 self, QtWidgets.QApplication.translate("Form", "Error"), r
             )
             return
-        filename = QtWidgets.QFileDialog.getSaveFileName(self, QtWidgets.QApplication.translate(
-            "Form", "Save Relation"), "", QtWidgets.QApplication.translate("Form", "Relations (*.csv)"))[0]
+        filename = QtWidgets.QFileDialog.getSaveFileName(
+            self, QtWidgets.QApplication.translate("Form", "Save Relation"),
+            "",
+            QtWidgets.QApplication.translate("Form", "Relations (*.csv)")
+        )[0]
         if (len(filename) == 0):  # Returns if no file was selected
             return
         self.selectedRelation.save(filename)
@@ -366,8 +368,15 @@ class relForm(QtWidgets.QMainWindow):
         It shouldn't be called giving filename but not giving name.'''
         # Asking for file to load
         if not filenames:
-            f = QtWidgets.QFileDialog.getOpenFileNames(self, QtWidgets.QApplication.translate(
-                "Form", "Load Relation"), "", QtWidgets.QApplication.translate("Form", "Relations (*.csv);;Text Files (*.txt);;All Files (*)"))
+            f = QtWidgets.QFileDialog.getOpenFileNames(
+                self,
+                QtWidgets.QApplication.translate("Form", "Load Relation"),
+                "",
+                QtWidgets.QApplication.translate(
+                    "Form",
+                    "Relations (*.csv);;Text Files (*.txt);;All Files (*)"
+                )
+            )
             filenames = f[0]
 
         for f in filenames: