linted using flake8 done

Author: kaliappan01

markdown_viewer/markdown_viewer.py

@@ -2,51 +2,50 @@
 from tkinter import font, filedialog, messagebox as mbox
 from markdown2 import Markdown
 from tkhtmlview import HTMLLabel
-#
-#python3 -m pip install --upgrade pip
-#python3 -m pip install --upgrade Pillow
-#tkhtmlview
 
 
 class Window(Frame):
-    def __init__(self,master = None):
-        Frame.__init__(self,master)
+
+    def __init__(self, master=None):
+        Frame.__init__(self, master)
         self.master = master
-        self.font = font.Font(family = "Helvetica", size=14)
+        self.font = font.Font(family='Helvetica', size=14)
         self.init_window()
 
     def openfile(self):
-        filename = filedialog.askopenfilename(filetypes=(("Markdown File", "*.md , *.mdown , *.markdown"),
-        ("Text file","*.txt"),
-        ("All files","*.*")))
+        filename = \
+            filedialog.askopenfilename(filetypes=(('Markdown File',
+                                                   '*.md , *.mdown , *.markdown'),
+                                                  ('Text file', '*.txt'),
+                                                  ('All files', '*.*')))
         if filename:
             try:
                 md2html = Markdown()
-                self.outputbox.set_html(md2html.convert(open(filename,"r").read()))
-            except:
-                mbox.showerror("Error opening file","The selected file cannot be opened !".format(filename))
+                self.outputbox.set_html(md2html.convert(open(filename,
+                                                             'r').read()))
+            except Exception:
+                mbox.showerror('Error opening file',
+                               'The selected file cannot be opened !')
 
-    
     def init_window(self):
-        self.master.title("Mardown Viewer")
+        self.master.title('Mardown Viewer')
         self.pack(fill=BOTH, expand=1)
 
         self.mainmenu = Menu(self)
         self.filemenu = Menu(self.mainmenu)
-        self.filemenu.add_command(label = "Open", command=self.openfile)
+        self.filemenu.add_command(label='Open', command=self.openfile)
         self.filemenu.add_separator()
-        self.filemenu.add_command(label = "Exit", command=self.quit)
-        self.mainmenu.add_cascade(label="File", menu=self.filemenu)
+        self.filemenu.add_command(label='Exit', command=self.quit)
+        self.mainmenu.add_cascade(label='File', menu=self.filemenu)
         self.master.config(menu=self.mainmenu)
 
-        self.outputbox = HTMLLabel(self, width = "1", background = "white", html="<h1>Welcome</h1>")
+        self.outputbox = HTMLLabel(self, width='1', background='white',
+                                   html='<h1>Welcome</h1>')
         self.outputbox.pack(fill=BOTH, expand=1, side=RIGHT)
         self.outputbox.fit_height()
 
 
 root = Tk()
-root.geometry("750x600")
+root.geometry('750x600')
 app = Window(root)
 app.mainloop()
-
-