Install pyqt4

apt install python3-pyqt4

E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

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Fix Audio Windows on MAC

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Tkinter tkFileDialog module

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Tkinter tkFileDialog module tkFileDialog  is a module with open and save dialog functions. Instead of implementing those in  Tkinter GUI  on your own. Related courses Tkinter GUI Application Development Projects Overview An overview of file dialogs: Function Parameters Purpose .askopenfilename Directory, Title, Extension To  open  file: Dialog that requests selection of an existing file. .asksaveasfilename Directory, Title, Extension) To  save  file: Dialog that requests creation or replacement of a file. .askdirectory None To  open directory Tkinter Open File The  askopenfilename  function to creates an file dialog object. The extensions are shown in the bottom of the form (Files of type). The code below will simply show the dialog and return the filename.  If a user presses cancel the filename is empty. On a Windows machine change the initialdir to “C:\”. Python 2.7 version: from Tkinter import * from Tkinter import * import Tkinter , Tkconstants ,
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Using real data types in VHDL

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Using real data types in VHDL    Apart from the standard types like integer and std_logic_vector's VHDL also offer  real  data types. But a real data type has a big disadvantage. It is not synthesis-able. It can be used only for simulation purposes. This disadvantage limits its use to a large extend, but there are plenty of projects where we look only for simulation results.   Before starting the coding part of a VHDL project,one has to decide whether the project to be implemented on a real FPGA or just a computer simulation is required. If it has to be ran on FPGA, then forget about the real package and use only synthesis-able data types like std_logic,integer etc... Otherwise you can reduce the time and complexity of your project by using real data types. The real data type is defined in the library called  MATH_REAL . So you have to include the following line before the entity declaration in the code: use ieee.math_real.all; The math_real package also offers some elemen
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