add: hello world with a !++ and !--

Two buttons to add and remove exclamatory to the sentence.

Author: NitkarshChourasia

nitkarshchourasia/GUI_apps/tkinter_apps/hello_world_excla_increment_app/hello_world_label.py

@@ -0,0 +1,50 @@
+import tkinter as tk
+from tkinter import ttk
+
+
+class MyApplication:
+    def __init__(self, master):
+        self.master = master
+        # Want to understand why .master.title was used?
+        self.master.title("Hello World")
+
+        self.create_widgets()
+
+    def create_widgets(self):
+        frame = ttk.Frame(self.master)
+        frame.pack(padx=20, pady=20)
+        # grid and pack are different geometry managers.
+        self.label = ttk.Label(frame, text="Hello World!", font=("Arial Bold", 50))
+        self.label.grid(row=0, column=0, padx=20, pady=20)
+
+        # Add a button for interaction
+        concat_button = ttk.Button(
+            frame, text="Click Me!", command=self.on_button_click
+        )
+        concat_button.grid(row=1, column=0, pady=10)
+
+        remove_button = ttk.Button(
+            frame, text="Remove '!'", command=self.on_remove_click
+        )
+        remove_button.grid(row=2, column=0, pady=10)
+
+    def on_button_click(self):
+        current_text = self.label.cget("text")
+        # current_text = self.label["text"]
+        #! Solve this.
+        new_text = current_text + "!"
+        self.label.config(text=new_text)
+
+    def on_remove_click(self):
+        # current_text = self.label.cget("text")
+        current_text = self.label["text"]
+        #! Solve this.
+        new_text = current_text[:-1]
+        self.label.config(text=new_text)
+        # TODO: Can make a char matching function, to remove the last char, if it is a '!'.
+
+
+if __name__ == "__main__":
+    root = tk.Tk()
+    app = MyApplication(root)
+    root.mainloop()