import sys

out = open("file.txt", "w")

sys.stdout = out

print("Hello")

out.close()

#!/usr/bin/python3
# -*- coding: utf-8 -*-
import sys, random
from PyQt5.QtWidgets import QMainWindow, QFrame, QDesktopWidget, QApplication, QWidget, QPushButton
from PyQt5.QtCore import Qt, QBasicTimer, pyqtSignal, QCoreApplication
from PyQt5.QtGui import QPainter, QColor, QIcon
class Tetris(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()
    def initUI(self):

./filename.py
# или
python3 filename.py