Python GUI tkinter Scientific Calculator

Question

„Warum die sin nicht funktioniert es mir ein Syntaxfehler geben ich einen wissenschaftlichen Rechner in Python 3,6

from tkinter import * 
from tkinter import ttk 
from math import* 

class Calculator: 
    calc_value = 0.0 
    div_trigger = False 
    mult_trigger = False 
    add_trigger = False 
    sub_trigger = False 
    asin_trigger = False 


    def button_press(self, value): 
     entry_val = self.number_entry.get() 
     entry_val += value 
     self.number_entry.delete(0, "end") 
     self.number_entry.insert(0, entry_val) 


    def isfloat(self, str_val): 
     try: 
      float(str_val) 
      return True 
     except ValueError: 
      return False 


    def math_button_press(self, value): 
     if self.isfloat(str(self.number_entry.get())): 
      self.add_trigger = False 
      self.sub_trigger = False 
      self.mult_trigger = False 
      self.div_trigger = False 
      self.asin_trigger = False 
      self.calc_value = float(self.entry_value.get()) 
      if value == "/": 
       print("/ Pressed") 
       self.div_trigger = True 
      elif value == "*": 
       print("* Pressed") 
       self.mult_trigger = True 
      elif value == "+": 
       print("+ Pressed") 
       self.add_trigger = True 
      elif value == "sin": 
       print("sin Pressed") 
       self.asin_trigger = True 
      else: 
       print("- Pressed") 
       self.sub_trigger = True 
      self.number_entry.delete(0, "end") 


    def equal_button_press(self): 
     if self.add_trigger or self.sub_trigger or self.mult_trigger or self.div_trigger or self.asin_trigger: 

      if self.add_trigger: 
       solution = self.calc_value + float(self.entry_value.get()) 
      elif self.sub_trigger: 
       solution = self.calc_value - float(self.entry_value.get()) 
      elif self.mult_trigger: 
       solution = self.calc_value * float(self.entry_value.get()) 
      elif self.asin_trigger: 
       solution = self.calc_value sin float(self.entry_value.get()) 
      else: 
       solution = self.calc_value/float(self.entry_value.get()) 

      print(self.calc_value, " ", float(self.entry_value.get()), 
              " ", solution) 

      # 
      self.number_entry.delete(0, "end") 

      self.number_entry.insert(0, solution) 


    def __init__(self, root): 
     self.entry_value = StringVar(root, value="") 
     root.title("Calculator") 
     root.geometry("860x440") 
     root.resizable(width=False, height=False) 
     style = ttk.Style() 
     style.configure("TButton", 
         font="Serif 15", 
         padding=10) 

     style.configure("TEntry", 
         font="Serif 18", 
         padding=10) 

     # Create the text entry box 
     self.number_entry = ttk.Entry(root, 
         textvariable=self.entry_value, width=50) 
     self.number_entry.grid(row=0, columnspan=4) 

     # ----- 1st Row ----- 

     self.button7 = ttk.Button(root, text="7", command=lambda: self.button_press('7')).grid(row=1, column=0) 

     self.button8 = ttk.Button(root, text="8", command=lambda: self.button_press('8')).grid(row=1, column=1) 

     self.button9 = ttk.Button(root, text="9", command=lambda: self.button_press('9')).grid(row=1, column=2) 

     self.button_div = ttk.Button(root, text="/", command=lambda: self.math_button_press('/')).grid(row=1, column=3) 

     # ----- 2nd Row ----- 

     self.button4 = ttk.Button(root, text="4", command=lambda: self.button_press('4')).grid(row=2, column=0) 

     self.button5 = ttk.Button(root, text="5", command=lambda: self.button_press('5')).grid(row=2, column=1) 

     self.button6 = ttk.Button(root, text="6", command=lambda: self.button_press('6')).grid(row=2, column=2) 

     self.button_mult = ttk.Button(root, text="*", command=lambda: self.math_button_press('*')).grid(row=2, column=3) 

     # ----- 3rd Row ----- 

     self.button1 = ttk.Button(root, text="1", command=lambda: self.button_press('1')).grid(row=3, column=0) 

     self.button2 = ttk.Button(root, text="2", command=lambda: self.button_press('2')).grid(row=3, column=1) 

     self.button3 = ttk.Button(root, text="3", command=lambda: self.button_press('3')).grid(row=3, column=2) 

     self.button_add = ttk.Button(root, text="+", command=lambda: self.math_button_press('+')).grid(row=3, column=3) 

     # ----- 4th Row ----- 

     self.button_clear = ttk.Button(root, text="AC", command=lambda: self.button_press('AC')).grid(row=4, column=0) 

     self.button0 = ttk.Button(root, text="0", command=lambda: self.button_press('0')).grid(row=4, column=1) 

     self.button_equal = ttk.Button(root, text="=", command=lambda: self.equal_button_press()).grid(row=4, column=2) 

     self.button_sub = ttk.Button(root, text="-", command=lambda: self.math_button_press('-')).grid(row=4, column=3) 

     #------- 5th Row ------- 
     self.button_asin = ttk.Button(root, text="sin", command=lambda: self.math_button_press('sin')).grid(row=5, column=0) 

root = Tk() 

calc = Calculator(root) 

root.mainloop() 

Answer 1

In Ihrer equal_button_press Funktion bin Codierung, schreiben:

elif self.asin_trigger: 
    solution = sin(float(self.calc_value)) # the sine of x is given by sin(x) 

und dann:

# remove float() to prevent crashing when the Entry box is empty 
print(self.calc_value, " ", self.entry_value.get(), " ", solution)