Use the black code formatter

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "python.formatting.provider": "black"
+}

README.md

@@ -1,3 +1,5 @@
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+
 # Bank2YNAB4
 Converts from bank transactions exported as CSV to the format accepted by YNAB4.
 

bank2ynab.pyw

@@ -8,17 +8,19 @@ from src.config import BankConfig
 PADX = 12
 PADY = 10
 
-BANK_DIR = Path('./banks')
+BANK_DIR = Path("./banks")
 
 ###################################
 #           GUI-code
 ###################################
 
+
 class Application(Tk):
     """
     Main window that can repace the frame that is shown
     https://stackoverflow.com/questions/7546050/switch-between-two-frames-in-tkinter
     """
+
     def __init__(self):
         Tk.__init__(self)
         self._frame = None
@@ -46,25 +48,25 @@ class BankSelection(Frame):
 
     def createWidgets(self):
         self.label = Label(self, text="Choose Your Bank:")
-        self.label.grid(column=0, row=0, sticky='W', ipadx=2)
+        self.label.grid(column=0, row=0, sticky="W", ipadx=2)
 
         banknames = [b.name for b in self.banks]
         self.bankName = StringVar()
         self.bankName.set(banknames[0])
 
         self.bankChosen = Combobox(self, width=12, textvariable=self.bankName)
-        self.bankChosen['values'] = banknames
+        self.bankChosen["values"] = banknames
         self.bankChosen.grid(column=1, row=0)
 
         self.confirm = Button(self, text="Ok", command=self.convert)
-        self.confirm.grid(column=0, row=1, columnspan=2, sticky='E', pady=5)
+        self.confirm.grid(column=0, row=1, columnspan=2, sticky="E", pady=5)
 
     def convert(self):
         try:
             inputPath = self.getFile()
             bank = self.banks[self.bankChosen.current()]
         except ValueError as e:
-            pass # No file selected
+            pass  # No file selected
         else:
             try:
                 result = bank2ynab(bank, inputPath)
@@ -73,13 +75,11 @@ class BankSelection(Frame):
                 Error(self, e)
 
     def getFile(self) -> Path:
-        inputPath = askopenfilename(
-                    filetypes=[('CSV files', '*.csv')],
-                    initialdir='.')
+        inputPath = askopenfilename(filetypes=[("CSV files", "*.csv")], initialdir=".")
         if inputPath:
             return Path(inputPath)
         else:
-            raise ValueError('No file selected')
+            raise ValueError("No file selected")
 
 
 class Report(Frame):
@@ -89,42 +89,45 @@ class Report(Frame):
         self.createLabels(args)
 
         self.exitButton = Button(self, text="Exit", command=self.master.destroy)
-        self.exitButton.grid(column=0, row=4, sticky='E')
+        self.exitButton.grid(column=0, row=4, sticky="E")
 
     def createLabels(self, args):
-        success, blankRows, ignoredRows, linesRead, rowsParsed= args
-
-        readStats = f'{linesRead}/{linesRead+blankRows+ignoredRows} rows read'
-        if(blankRows+ignoredRows != 0):
-            ignoreStats = f' (ignored {blankRows} blank rows and ' \
-                    f'{ignoredRows} transactions found in accignore).'
+        success, blankRows, ignoredRows, linesRead, rowsParsed = args
+
+        readStats = f"{linesRead}/{linesRead+blankRows+ignoredRows} rows read"
+        if blankRows + ignoredRows != 0:
+            ignoreStats = (
+                f" (ignored {blankRows} blank rows and "
+                f"{ignoredRows} transactions found in accignore)."
+            )
             readStats = readStats + ignoreStats
 
-        parsedStats = f'{rowsParsed}/{linesRead} rows parsed '
+        parsedStats = f"{rowsParsed}/{linesRead} rows parsed "
 
         if not success:
             self.status = "Conversion failed."
         else:
             self.status = "YNAB csv-file successfully written."
 
         self.statusLabel = Label(self, text=self.status)
-        self.statusLabel.grid(column=0, row=0, sticky='W', pady=5)
+        self.statusLabel.grid(column=0, row=0, sticky="W", pady=5)
 
-        self.readStatsLabel  = Label(self, text=readStats)
-        self.readStatsLabel.grid(column=0, row=1, sticky='W')
+        self.readStatsLabel = Label(self, text=readStats)
+        self.readStatsLabel.grid(column=0, row=1, sticky="W")
 
         self.parsedStatsLabel = Label(self, text=parsedStats)
-        self.parsedStatsLabel.grid(column=0, row=3, sticky='W')
+        self.parsedStatsLabel.grid(column=0, row=3, sticky="W")
 
 
 class Error(Toplevel):
     """Pop-up for displaying an error message"""
+
     def __init__(self, master, arg):
         Toplevel.__init__(self, master, padx=PADX, pady=PADY)
         self.title("Error")
 
         self.msg = Message(self, text=arg, aspect=380)
-        self.msg.grid(column=0, row=0,  pady=5)
+        self.msg.grid(column=0, row=0, pady=5)
         self.columnconfigure(0, minsize=180)
 
         button = Button(self, text="Dismiss", command=self.destroy)
@@ -133,4 +136,4 @@ class Error(Toplevel):
 
 if __name__ == "__main__":
     app = Application()
-    app.mainloop()
+    app.mainloop()

pyproject.toml

@@ -12,6 +12,7 @@ tomli = "^1.2.1"
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.4"
 hypothesis = "^6.14.1"
+black = "^21.12b0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]