I am getting this error : valueerror: could not convert string to float: ' '.

  1  # imports
  2  from tkinter import *
  3  import os, sys
  4  #from scipy import stats
  5  
  6  from PIL import ImageTk, Image
  7  
  8  
  9  # Main Screen
 10  master = Tk()
 11  master.title('Welborn Bank')
 12  
 13  # Image working-
 14  img = Image.open('online-banking.png')
 15  img = img.resize((400,300))
 16  img = ImageTk.PhotoImage(img)
 17  
 18  
 19  def finish_reg():
 20      Name = temp_Name.get()
 21      Age = temp_Age.get()
 22      Gender = temp_Gender.get
 23      Password = temp_Password.get()
 24      all_accounts = os.listdir()
 25      if Name == "" or Age == "" or Gender == "" or Password == "":
 26          notif.config(fg="red", text="All fields are required *")
 27          notif.grid(row=7, column=0)
 28          return
 29  
 30      for name_check in all_accounts:
 31          if Name == name_check:
 32              notif.config(fg="red", text="Account already exists")
 33              return
 34          else:
 35              new_file = open(Name, "w")
 36              new_file.write('Name' + '\n')
 37              new_file.write('Password' + '\n')
 38              new_file.write('Age' + '\n')
 39              new_file.write('Gender')
 40              new_file.write('0')
 41              new_file.write('0')
 42              new_file.close()
 43  
 44  
 45  # Function for clearing the
 46  # contents of all entry boxes
 47  
 48  
 49  '''
 50  
 51  # Function to find compound interest
 52  def calculate_ci():
 53      # get a content from entry box
 54      principle = int(principle_field.get())
 55  
 56      rate = float(rate_field.get())
 57  
 58      time = int(time_field.get())
 59  
 60      # Calculates compound interest
 61      CI = principle * (pow((1 + rate / 100), time))
 62  
 63      # insert method inserting the
 64      # value in the text entry box.
 65      compound_field.insert(10, CI)
 66  
 67  
 68  # Driver code
 69  if __name__ == "__main__":
 70      # Create a GUI window
 71      root = Tk()
 72  
 73      # Set the background colour of GUI window
 74      root.configure(background='light green')
 75  
 76      # Set the configuration of GUI window
 77      root.geometry("400x250")
 78  
 79      # set the name of tkinter GUI window
 80      root.title("Compound Interest Calculator")
 81  
 82      # Create a Principle Amount : label
 83      label1 = Label(root, text="Principle Amount(Rs) : ",
 84                     fg='black', bg='red')
 85  
 86      # Create a Rate : label
 87      label2 = Label(root, text="Rate(%) : ",
 88                     fg='black', bg='red')
 89  
 90      # Create a Time : label
 91      label3 = Label(root, text="Time(years) : ",
 92                     fg='black', bg='red')
 93  
 94      # Create a Compound Interest : label
 95      label4 = Label(root, text="Compound Interest : ",
 96                     fg='black', bg='red')
 97  
 98      # grid method is used for placing
 99      # the widgets at respective positions
100      # in table like structure .
101  
102      # padx keyword argument used to set padding along x-axis .
103      # pady keyword argument used to set padding along y-axis .
104      label1.grid(row=1, column=0, padx=10, pady=10)
105      label2.grid(row=2, column=0, padx=10, pady=10)
106      label3.grid(row=3, column=0, padx=10, pady=10)
107      label4.grid(row=5, column=0, padx=10, pady=10)
108  
109      # Create a entry box
110      # for filling or typing the information.
111      principle_field = Entry(root)
112      rate_field = Entry(root)
113      time_field = Entry(root)
114      compound_field = Entry(root)
115  
116      # grid method is used for placing
117      # the widgets at respective positions
118      # in table like structure .
119  
120      # padx keyword argument used to set padding along x-axis .
121      # pady keyword argument used to set padding along y-axis .
122      principle_field.grid(row=1, column=1, padx=10, pady=10)
123      rate_field.grid(row=2, column=1, padx=10, pady=10)
124      time_field.grid(row=3, column=1, padx=10, pady=10)
125      compound_field.grid(row=5, column=1, padx=10, pady=10)
126  
127      # Create a Submit Button and attached
128      # to calculate_ci function
129      button1 = Button(root, text="Submit", bg="red",
130                       fg="black", command=calculate_ci)
131  
132      # Create a Clear Button and attached
133      # to clear_all function
134      button2 = Button(root, text="Clear", bg="red",
135                       fg="black", command=clear_all)
136  
137      button1.grid(row=4, column=1, pady=10)
138      button2.grid(row=6, column=1, pady=10)
139  
140      # Start the GUI
141      root.mainloop()
142  
143  '''
144  
145  
146  def register():
147      global temp_Name
148      global temp_Age
149      global temp_Gender
150      global temp_Password
151      global notif
152  
153      temp_Name = StringVar()
154      temp_Age = StringVar()
155      temp_Gender = StringVar()
156      temp_Password = StringVar()
157  
158      register_screen = Toplevel(master)
159      register_screen.title('Register')
160  
161      Label(register_screen, text="Please Enter your Details to Register", font=('Calibri bold', 31), fg='Purple').grid(row=0, sticky=N,pady=20)
162      Label(register_screen, text="Name", font=('Calibri', 20),fg='Blue').grid(row=1, sticky=W, pady=10)
163      Label(register_screen, text="Age", font=('Calibri', 20),fg='Blue').grid(row=2, sticky=W)
164      Label(register_screen, text="Gender", font=('Calibri', 20),fg='Blue').grid(row=3, sticky=W)
165      Label(register_screen, text="Password", font=('Calibri', 20),fg='Blue').grid(row=4, sticky=W)
166  
167      Entry(register_screen, textvariable=temp_Name, bg='Black', fg='White', font=(12)).grid(row=1, column=0)
168      Entry(register_screen, textvariable=temp_Age, bg='Black', fg='White', font=(12)).grid(row=2, column=0)
169      Entry(register_screen, textvariable=temp_Gender, bg='Black', fg='White', font=(12)).grid(row=3, column=0)
170      Entry(register_screen, textvariable=temp_Password, show="*", bg='Black', fg='White', font=(12)).grid(row=4, column=0)
171  
172      Button(register_screen, text="Register", font=('Calibre Bold' ,15),fg='Red',bg='Yellow',command=finish_reg).grid(row=8, column=0)
173  
174  
175  '''def fixed_deposit(self):
176          print('for fixed deposit: ')
177          d = float(input('enter the duration: '))
178          r = float(input('enter the rate of interest: '))
179          a = float(input('enter the amount: '))
180          si = (a * r * d) / 100
181          print('your amount after', d, 'years is', si, )
182          self.balance = self.balance + si
183          print('final balance is: ', self.balance)
184  
185      def recurring_deposit(self):
186          print('for recurring deposit: ')
187          d = int(input('enter the duration in months: '))
188          r = float(input("enter the rate of interest: "))
189          a = float(input("enter the monthly payment:"))
190          cf = float(input("enter the compound frequency:"))
191          if (d > 6 and d < 120) and (a > 1000):
192              rd = a * (1 + r / cf) * (cf * d)
193              print("The recurring deposit amount after ", d, "months is", rd)
194          else:
195              print("recurring deposit is not permitted")'''
196  
197  
198  def login_session():
199  
200      global login_Name
201      all_accounts = os.listdir()
202      login_Name = temp_login_Name.get()
203      login_password = temp_login_Password.get()
204  
205      for Name in all_accounts:
206          if Name == login_Name:
207              file = open(Name, 'r')
208              file_data = file.read()
209              file_data = file_data.split('\n')
210              password = file_data[1]
211  
212              # account dashboard
213  
214              if login_password == password:
215                  login_screen.destroy()
216                  account_dashboard = Toplevel(master)
217                  account_dashboard.title('Account Dashboard')
218  
219                  # labels
220                  Label(account_dashboard, text="Account Dashboard", font=('Calibri Bold', 32)).grid(row=0, sticky=N, pady=10)
221                  Label(account_dashboard, text="Welcome" + ' ' +  Name, font=('Calibri bold', 22), fg='red').grid(row=1, sticky=N, pady=10)
222  
223                  # Buttons
224                  Button(account_dashboard, text="Personal Details", font=('Calibri', 18), width=25, command= personal_details).grid(row=2, sticky=N, padx=10)
225                  Button(account_dashboard, text="Deposit", font=('Calibri', 18), width=25, command=deposit).grid(row=3, sticky=N,padx=10)
226                  Button(account_dashboard, text="Withdraw", font=('Calibri', 18), width=25, command=withdraw).grid(row=4, sticky=N, padx=10)
227                  Button(account_dashboard, text="Fixed Deposit", font=('Calibri', 18), width=25, command=fixed_deposit).grid(row=5, sticky=N, padx=10)
228  
229                  Label(account_dashboard).grid(row=6, sticky=N, pady=10)
230                  return
231  
232              else:
233                  login_notif.config(fg='Red', text='Password Incorrect')
234                  return
235      login_notif.config(fg='red', text='No account found')
236  
237  
238  def deposit():
239      # vars
240      global amount
241      global deposit_notif
242      global current_balance_label
243      amount = StringVar()
244      file = open(login_Name,'r')
245      file_data = file.read()
246      user_details = file_data.split('\n')
247      details_balance = user_details[4]
248  
249      # deposit screen
250      deposit_screen = Toplevel(master)
251      deposit_screen.title('Deposit')
252  
253      # label
254      Label(deposit_screen, text='Deposit', font=('Calibri bold', 33)).grid(row=0,column=0,sticky=N, pady=10)
255      current_balance_label = Label(deposit_screen, text='current balance:$' + details_balance, font=('Calibri', 23))
256      current_balance_label.grid(row=1, sticky=W)
257      Label(deposit_screen, text='Amount', font=('Calibri', 23)).grid(row=2, sticky=W)
258      deposit_notif = Label(deposit_screen, font=('Calibri', 23))
259      deposit_notif.grid(row=4, sticky=N, pady=5)
260      # entry
261      Entry(deposit_screen, textvariable=amount).grid(row=2, column=1)
262      # button
263      Button(deposit_screen, text='Deposit', font=('Calibri', 15), command=finish_deposit).grid(row=3, sticky=W, pady=5)
264  
265  
266  def finish_deposit():
267      if amount.get() == '':
268          deposit_notif.config(text='amount is required', fg='red', font = ("Cambria italic" ,23))
269          return
270  
271      if float(amount.get()) <= 0:
272          deposit_notif.config(text='Negative Currency is not accepted', fg='red')
273          return
274  
275      file = open(login_Name, 'r+')
276      file_data = file.read()
277      details = file_data.split('\n')
278      current_balance = details[4]
279      updated_balance = current_balance
280      updated_balance = float(updated_balance) + float(amount.get())
281      file_data = file_data.replace(current_balance, str(updated_balance))
282      file.seek(0)
283      file.truncate(0)
284      file.write(file_data)
285      file.close()
286      current_balance_label.config(text='current balance : $ ' + str(updated_balance), fg='green')
287      deposit_notif.config(text='balance updated', fg='green')
288  
289  
290  def withdraw():
291      # Vars
292      global withdraw_amount
293      global withdraw_notif
294      global current_balance_label
295      global amount
296      withdraw_amount = StringVar()
297      amount = IntVar()
298      file = open(login_Name, "r")
299      file_data = file.read()
300      user_details = file_data.split('\n')
301      details_balance = user_details[4]
302      # withdraw Screen
303      withdraw_screen = Toplevel(master)
304      withdraw_screen.title('Withdraw')
305  
306      # Label
307      Label(withdraw_screen, text="Withdraw", font=('Calibri bold', 33)).grid(row=0, column=0,sticky=N, pady=10)
308      current_balance_label = Label(withdraw_screen, text="Current balance:$" + details_balance, font=('Calibri', 23))
309      current_balance_label.grid(row=1, sticky=W)
310      Label(withdraw_screen, text="Amount:", font=('Calibri', 23)).grid(row=2, sticky=W)
311      withdraw_notif = Label(withdraw_screen, font=('Calibri', 23))
312      withdraw_notif.grid(row=4, sticky=N, pady=5)
313      # Entry
314      Entry(withdraw_screen, textvariable='amount').grid(row=2, column=1)
315      # Button
316      Button(withdraw_screen, text="Withdraw", font=('Cambria,', 15), command=finish_withdraw).grid(row=5, sticky=W, pady=5)
317  
318  
319  def finish_withdraw():
320      if withdraw_amount.get == "":
321          withdraw_notif.config(text='Amount is required!', fg="red")
322          return
323      if float(withdraw_amount.get()) <= 0:
324          withdraw_notif.config(text='Negative currency is not accepted', fg='red')
325          return
326      file = open(login_Name, 'r+')
327      file_data = file.read()
328      details = file_data.split('\n')
329      current_balance = details[4]
330  
331      if float(withdraw_amount.get()) > float(current_balance):
332          withdraw_notif.config(text='Insufficient Funds!', fg='red')
333          return
334  
335      updated_balance = current_balance
336      updated_balance = float(updated_balance) - float(withdraw_amount.get())
337      file_data = file_data.replace(current_balance, str(updated_balance))
338      file.seek(0)
339      file.truncate(0)
340      file.write(file_data)
341      file.close()
342  
343      current_balance_label.config(text="Current balance : $" + ' ' + str(updated_balance), fg="green", font=('Cambria',23))
344      withdraw_notif.config(text="Balance Updated", fg="green")
345  
346  
347  def personal_details():
348      # Vars
349      file = open(login_Name, 'r')
350      file_data = file.read()
351      user_details = file_data.split('\n')
352      details_name = user_details[0]
353      details_age = user_details[2]
354      details_gender = user_details[3]
355      details_balance = user_details[4]
356  
357      personal_details_screen = Toplevel(master)
358      personal_details_screen.title('Personal Details')
359  
360      # Labels
361      Label(personal_details_screen, text="Personal Details", font=('Calibri bold', 40)).grid(row=0, column=1,sticky=N, pady=10)
362      Label(personal_details_screen, text="Name : " + details_name, font=('Cambria', 25)).grid(row=1,column=1, sticky=W)
363      Label(personal_details_screen, text="Age : " + details_age, font=('Cambraia', 25)).grid(row=2, column=1,sticky=W)
364      Label(personal_details_screen, text="Gender : " + details_gender, font=('Cambria', 25)).grid(row=3, column=1,sticky=W)
365      Label(personal_details_screen, text="Balance : $ " + details_balance, font=('Cambria', 25)).grid(row=5, column=1, sticky=W)
366  
367  
368  def login():
369      # Vars
370  
371      global temp_login_Name
372      global temp_login_Password
373      global login_notif
374      global login_screen
375      temp_login_Name = StringVar()
376      temp_login_Password = StringVar()
377  
378      # LOGIN SCREEN
379      # print("This is a login page")
380      login_screen = Toplevel(master)
381      login_screen.title('Login')
382  
383      Label(login_screen, text="LOGIN TO YOUR ACCOUNT", font=('Calibri bold', 29), fg='Red',bg='Cyan').grid(row=0, column=0,sticky=N, pady=15)
384      Label(login_screen, text="Username ", font=('Cambria bold', 15)).grid(row=1, sticky=W)
385      Label(login_screen, text="Password  ", font=('Cambria bold', 15)).grid(row=2, sticky=W)
386      login_notif = Label(login_screen, font=('Calibri bold', 25))
387      login_notif.grid(row=5, column=2,sticky=N)
388  
389      # entries
390      Entry(login_screen, textvariable=temp_login_Name, font=(14), fg='White', bg='black').grid(row=1, column=0, padx=3)
391      Entry(login_screen, textvariable =temp_login_Password, show="*", font=(14), fg='white', bg='Black').grid(row=2, column=0, padx=3)
392      # Buttons
393      Button(login_screen, text='LOGIN', command=login_session, width=15, font=('Palatino', 14), fg='blue').grid(row=7,column=0, sticky=W, pady=5, padx=5)
394  
395  
396  '''def fixed_deposit():
397      print('for fixed deposit: ')
398          d=float(input('enter the duration: '))
399          r=float(input('enter the rate of interest: '))
400          a=float(input('enter the amount: '))
401          si=(a*r*d)/100
402          print('your amount after',d, 'years is' ,si,)
403          self.balance=self.balance+si
404          print('final balance is: ', self.balance)'''
405  
406  
407  def fixed_deposit():
408      # vars
409      global fd_amount
410      global fixed_deposit_notif
411      global current_balance_label
412      fd_amount = StringVar
413      file = open(login_Name,'r')
414      file_data = file.read()
415      user_details = file_data.split('\n')
416      details_balance = user_details[4]
417  
418      # deposit screen
419      fixed_deposit_screen = Toplevel(master)
420      fixed_deposit_screen.title('Fixed Deposit')
421  
422      # label
423      Label(fixed_deposit_screen, text='Fixed Deposit', font=('Calibri Bold', 33)).grid(row=0,column=0,sticky=N, pady=10)
424      current_balance_label = Label(fixed_deposit_screen, text='current balance: $' + details_balance, font=('Calibri', 23))
425      current_balance_label.grid(row=1, sticky=W)
426      Label(fixed_deposit_screen, text='Amount', font=('Calibri', 23)).grid(row=2, sticky=W)
427      Label(fixed_deposit_screen, text='Rate of Interest', font=('Calibri', 23)).grid(row=3, sticky=W)
428      Label(fixed_deposit_screen, text='Duration', font=('Calibri', 23)).grid(row=4, sticky=W)
429      Label(fixed_deposit_screen, text= 'Compounding type', font=('calibri',23)).grid(row=5,sticky=W)
430      fixed_deposit_notif = Label(fixed_deposit_screen, font=('Calibri', 23))
431      fixed_deposit_notif.grid(row=6, sticky=N, pady=5)
432  
433      # entry
434      Entry(fixed_deposit_screen, textvariable= 'Amount').grid(row=2, column=1)
435      Entry(fixed_deposit_screen, textvariable= 'Rate Of Interest').grid(row=3, column=1)
436      Entry(fixed_deposit_screen, textvariable= 'Duration').grid(row=4, column=1)
437      Entry(fixed_deposit_screen, textvariable= 'Compounding type').grid(row=5, column=1)
438      # button
439      Button(fixed_deposit_screen, text='Calculate', font=('Calibri', 15), command=finish_deposit).grid(row=6, sticky=W, pady=5)
440  
441  
442  def finish_fixed_deposit():
443      if fd_amount.get() == '':
444          deposit_notif.config(text='All Details are required', fg='red', font = ("Cambria italic" ,23))
445          return
446  
447      if float(fd_amount.get()) <= 0 and (float(amount.get()) < 10000):
448          deposit_notif.config(text='Sorry, Negative Values are not accepted and Amount is less than $10000', fg='red')
449          return
450  
451      file = open(login_Name, 'r+')
452      file_data = file.read()
453      details = file_data.split('\n')
454      current_balance = details[4]
455      updated_balance = current_balance
456  
457      def fd_amount():
458          print(float(input("Enter Amount: ")), fd_amount)
459  
460      def rate_of_interest():
461          print(float(input("Enter Rate of Interest: ")), rate_of_interest)
462  
463      def duration():
464          print(float(input("Enter the tenure: ")), duration)
465  
466      def comp():
467          print(int(input("Enter compounding payout : ")), comp)
468  
469      updated_balance = fd_amount*(1 + rate_of_interest/comp)**(duration*comp)
470  
471      file_data = file_data.replace(current_balance, str(updated_balance))
472      file.seek(0)
473      file.truncate(0)
474      file.write(file_data)
475      file.close()
476      current_balance_label.config(text='current balance : $ ' + str(updated_balance), fg='green')
477      deposit_notif.config(text='balance updated', fg='green')
478  
479  
480  Label(master, text="WELBORN Bank", font=('Calibri Bold', 45)).grid(row=0, sticky=N)
481  Label(master, text="Always at your service", font=('Calibri italic', 19)).grid(row=1, sticky=N, pady=10)
482  Label(master, image=img).grid(row=2, sticky=N, pady=25, padx=25)
483  
484  
485  # Buttons
486  Button(master, text="Register", font=('Calibri', 20),fg='yellow',bg='Blue' ,width=20, command = register).grid(row=3, sticky=N)
487  Button(master, text="Login", font=('Calibri', 20),fg='yellow',bg='Blue', width=20, command = login).grid(row=4, sticky=N, pady=13)
488  
489  
490  master.mainloop()
491  
492  
493  # Points to be added further - RD and Loan calculator