My changes

3 calcGUI/ChristinaTimokhinCalcGui

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+'''
+Modified calcGUI
+This example helps show how the tkinter library works in Python.
+Run it and press the 1 key on your keyboard. Why does "dominic" appear in the entry bar?
+Why does one key have "DT" on it? When you click it, why does it make "Thomas" show in the entry bar?
+Why is the font in the entry bar now fancy?
+How would we add more buttons?
+'''
+
+from tkinter import *
+from math import sqrt as sqr
+
+
+class Calculator(Frame):
+    """
+    An example of a calculator app developed using the 
+    Tkinter GUI.
+    """
+
+    def __init__(self, master):
+        """
+        Initializes the frame.
+        :param master: root.Tk()
+        """
+        Frame.__init__(self, master)
+        self.entry = Entry(master, width=32, font=("Brush Script MT",25))
+        self.entry.grid(row=0, column=0, columnspan=6, sticky="w")
+        self.entry.focus_set()
+        self.entry.configure(state="disabled", disabledbackground="white", disabledforeground="black")
+        self.create_widgets()
+        self.bind_buttons(master)
+        self.grid()
+
+    def add_chr(self, char, btn=None):
+        """
+        Concatenates a character passed from a button press (or key type) 
+        to a string.
+        :param char: string to add passed from a button
+        :param btn: button name to use if key is pressed (to flash)
+        :return: None
+        """
+        self.entry.configure(state="normal")
+        self.flash(btn) # Flash a button correspond to keystroke
+        if self.entry.get() == "Invalid Input":
+            self.entry.delete(0,END)
+        self.entry.insert(END, char)
+        self.entry.configure(state="disabled")
+
+    def clear(self):
+        """
+        Allows user to backspace their entry.
+        :return: None
+        """
+        self.entry.configure(state="normal")
+        if self.entry.get() != "Invalid Input":
+            # Clears full entry when "Invalid Input"
+            text = self.entry.get()[:-1]
+            self.entry.delete(0,END)
+            self.entry.insert(0,text)
+        else:
+            self.entry.delete(0, END)
+        self.entry.configure(state="disabled")
+
+    def clear_all(self):
+        """
+        Allows user to clear the full entry.
+        :return: None
+        """
+        self.entry.configure(state="normal")
+        self.entry.delete(0, END)
+        self.entry.configure(state="disabled")
+
+    def calculate(self):
+        """
+        Changes the operation symbols to their mathematical representation used in 
+        the eval() method.
+        :return: None
+        """
+        self.entry.configure(state="normal")
+        e = self.entry.get()
+        e = e.replace("√","sqr")
+        e = e.replace("×", "*")
+        e = e.replace("²", "**2")
+        e = e.replace("^", "**")
+        e = e.replace("÷", "/")
+
+        try:
+            ans = eval(e)
+        except Exception as ex:
+            self.entry.delete(0,END)
+            self.entry.insert(0, "Invalid Input")
+        else:
+            self.entry.delete(0,END)
+            if len(str(ans)) > 20: # Alleviates problem of large numbers
+                self.entry.insert(0, '{:.10e}'.format(ans))
+            else:
+                self.entry.insert(0, ans)
+        self.entry.configure(state="disabled")
+
+    def flash(self,btn):
+        """
+        Flashes a corresponding button when key is pressed.
+        :param btn: button
+        :return: None
+        """
+        if btn != None:
+            btn.config(bg="yellow")
+            if btn == self.c_bttn:
+                self.clear()
+                self.master.after(100, lambda: btn.config(bg="SystemButtonFace"))
+            elif btn == self.eq_bttn:
+                self.master.after(100, lambda: btn.config(bg="lightgrey"))
+                self.calculate()
+            elif btn == self.ac_bttn:
+                self.clear_all()
+                self.master.after(100, lambda: btn.config(bg="SystemButtonFace"))
+            else:
+                self.master.after(100, lambda: btn.config(bg="SystemButtonFace"))
+        else:
+            pass
+
+    def bind_buttons(self, master):
+        """
+        Binds keys to their appropriate input
+        :param master: root.Tk()
+        :return: None
+        """
+        master.bind("<Return>", lambda event, btn=self.eq_bttn: self.flash(btn))
+        master.bind("<BackSpace>", lambda event, btn=self.c_bttn: self.flash(btn))
+        master.bind("9", lambda event, char="9", btn=self.nine_bttn: self.add_chr(char, btn))
+        master.bind("8", lambda event, char="8", btn=self.eight_bttn: self.add_chr(char, btn))
+        master.bind("7", lambda event, char="7", btn=self.seven_bttn: self.add_chr(char, btn))
+        master.bind("6", lambda event, char="6", btn=self.six_bttn: self.add_chr(char, btn))
+        master.bind("5", lambda event, char="5", btn=self.five_bttn: self.add_chr(char, btn))
+        master.bind("4", lambda event, char="4", btn=self.four_bttn: self.add_chr(char, btn))
+        master.bind("3", lambda event, char="3", btn=self.three_bttn: self.add_chr(char, btn))
+        master.bind("2", lambda event, char="2", btn=self.two_bttn: self.add_chr(char, btn))
+        master.bind("1", lambda event, char="Dominic", btn=self.one_bttn: self.add_chr(char, btn))
+        master.bind("0", lambda event, char="0", btn=self.zero_bttn: self.add_chr(char, btn))
+        master.bind("*", lambda event, char="×", btn=self.mult_bttn: self.add_chr(char, btn))
+        master.bind("/", lambda event, char="÷", btn=self.div_bttn: self.add_chr(char, btn))
+        master.bind("^", lambda event, char="^", btn=self.sqr_bttn: self.add_chr(char, btn))
+        master.bind("%", lambda event, char="%", btn=self.mod_bttn: self.add_chr(char, btn))
+        master.bind(".", lambda event, char=".", btn=self.dec_bttn: self.add_chr(char, btn))
+        master.bind("-", lambda event, char="-", btn=self.sub_bttn: self.add_chr(char, btn))
+        master.bind("+", lambda event, char="+", btn=self.add_bttn: self.add_chr(char, btn))
+        master.bind("(", lambda event, char="(", btn=self.lpar_bttn: self.add_chr(char, btn))
+        master.bind(")", lambda event, char=")", btn=self.rpar_bttn: self.add_chr(char, btn))
+        master.bind("c", lambda event, btn=self.ac_bttn: self.flash(btn), self.clear_all)
+
+    def create_widgets(self):
+        """
+        Creates the widgets to be used in the grid.
+        :return: None
+        """
+        self.eq_bttn = Button(self, text="=", width=20, height=3, bg="Orange", command=lambda: self.calculate())
+        self.eq_bttn.grid(row=4, column=4, columnspan=2)
+
+        self.ac_bttn = Button(self, text='CE', width=9, height=3, bg='LightBlue', fg='red',command=lambda: self.clear_all())
+        self.ac_bttn.grid(row=1, column=4)
+
+        self.c_bttn = Button(self, text='←', width=9, height=3, bg='LightBlue', fg='red',command=lambda: self.clear())
+        self.c_bttn.grid(row=1, column=5 )
+
+        self.add_bttn = Button(self, text="+", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('+'))
+        self.add_bttn.grid(row=4, column=3)
+
+        self.mult_bttn = Button(self, text="×", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('×'))
+        self.mult_bttn.grid(row=2, column=3)
+
+        self.sub_bttn = Button(self, text="-", width=9, height=3, bg='LightBlue', fg='red',command=lambda: self.add_chr('-'))
+        self.sub_bttn.grid(row=3, column=3)
+
+        self.div_bttn = Button(self, text="÷", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('/'))
+        self.div_bttn.grid(row=1, column=3)
+
+        self.mod_bttn = Button(self, text="%", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('%'))
+        self.mod_bttn.grid(row=4, column=2)
+
+        self.seven_bttn = Button(self, text="7", width=9, height=3, bg='LightBlue', fg='red',command=lambda: self.add_chr("7"))
+        self.seven_bttn.grid(row=1, column=0)
+
+        self.eight_bttn = Button(self, text="8", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(8))
+        self.eight_bttn.grid(row=1, column=1)
+
+        self.nine_bttn = Button(self, text="9", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(9))
+        self.nine_bttn.grid(row=1, column=2)
+
+        self.four_bttn = Button(self, text="4", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(4))
+        self.four_bttn.grid(row=2, column=0)
+
+        self.five_bttn = Button(self, text="5", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(5))
+        self.five_bttn.grid(row=2, column=1)
+
+        self.six_bttn = Button(self, text="6", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(6))
+        self.six_bttn.grid(row=2, column=2)
+
+        self.one_bttn = Button(self, text="Christina", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr("Timokhin"))
+        self.one_bttn.grid(row=3, column=0)
+
+        self.two_bttn = Button(self, text="DT", width=9, height=3, bg='LightBlue', fg='red',command=lambda: self.add_chr("Thomas"))
+        self.two_bttn.grid(row=3, column=1)
+
+        self.three_bttn = Button(self, text="3", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(3))
+        self.three_bttn.grid(row=3, column=2)
+
+        self.zero_bttn = Button(self, text="0", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(0))
+        self.zero_bttn.grid(row=4, column=0)
+
+        self.dec_bttn = Button(self, text=".", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('.'))
+        self.dec_bttn.grid(row=4, column=1)
+
+        self.lpar_bttn = Button(self, text="(", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('('))
+        self.lpar_bttn.grid(row=2, column=4)
+
+        self.rpar_bttn = Button(self, text=")", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr(')'))
+        self.rpar_bttn.grid(row=2, column=5)
+
+        self.sq_bttn = Button(self, text="√", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('√('))
+        self.sq_bttn.grid(row=3, column=4)
+
+        self.sqr_bttn = Button(self, text="^", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('^'))
+        self.sqr_bttn.grid(row=3, column=5)
+
+        self.sin_btn = Button(self, text="sin", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('SIN'))
+        self.sin_btn.grid(row=1, column=6)
+
+        self.cos_btn = Button(self, text="cos", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('COS'))
+        self.cos_btn.grid(row=2, column=6)
+
+        self.tan_btn = Button(self, text="tan", width=9, height=3,bg='LightBlue', fg='red', command=lambda: self.add_chr('TAN'))
+        self.tan_btn.grid(row=3, column=6)
+
+root = Tk()
+root.geometry()
+root.title("Modified GUI Calculator")
+app = Calculator(root)
+root.mainloop()

Python Absolute Beginner/P1M1_Christina_Timokhin.py

@@ -0,0 +1,19 @@
+# Allergy check 
+
+# 1[ ] get input for test
+input_test = input("Enter food categories: ")
+
+# 2/3[ ] print True if "dairy" is in the input or False if not
+print("Dairy:","dairy" in input_test)
+
+# 4[ ] Check if "nuts" are in the input
+print("Nuts:","nuts" in input_test)
+
+# 4+[ ] Challenge: Check if "seafood" is in the input
+print("Seafood:","seafood" in input_test)
+
+# 4+[ ] Challenge: Check if "chocolate" is in the input
+print("Chocolate:","chocolate" in input_test)
+
+# user input
+# cheese egg nuts candy sugar