How to run python programs on your android phones?
Pydroid 3 is the most easy to use and powerful educational Python 3 IDE for Android.  PyDroid 3 -  PyDroid is less known python IDE.

Features:

• Offline Python 3.8 interpreter: no Internet is required to run Python programs.
• Pip package manager and a custom repository for prebuilt wheel packages for enhanced scientific libraries, such as numpy, scipy, matplotlib, scikit-learn and jupyter.
• OpenCV is now available (on devices with Camera2 API support).
• TensorFlow and PyTorch are also available.
• Examples available out-of-the-box for quicker learning.
• Complete Tkinter support for GUI.
• Full-featured Terminal Emulator, with a readline support (available in pip).
• Built-in C, C++ and even Fortran compiler designed specially for Pydroid 3. It lets Pydroid 3 build any library from pip, even if it is using native code. You can also build & install dependencies from a command line.
• Cython support.
• PDB debugger with breakpoints and watches.
• Kivy graphical library with a shiny new SDL2 backend.
• PyQt5 support available in Quick Install repository along with matplotlib PyQt5 support with no extra code required.
• Matplotlib Kivy support available in Quick Install repository.
• Pygame 2 support.

Editor Features:

• Code prediction, auto indentation and real time code analysis just like in any real IDE.
• Extended keyboard bar with all symbols you need to program in Python.
• Syntax highlighting & themes.
• Tabs.
• Enhanced code navigation with interactive assignment/definition gotos.
• One click share on Pastebin.