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How can you simulate double tapping space in python?

I've been trying to code a Minecraft bot for a server that gives fly if you double tap space. However, I've been unable to find a way to click the space bar twice without leaving the initial click still active or too slow to activate the fly effect in the maximum 1.3 second time period. I've tried to find the string value for spacebar in other modules such as win32com and pyautogui but I've been unable to find them by myself or through the internet. I've also used keyboard.release('space') to simulating lifting your finger off from the spacebar, but this is too slow for the fly permission to be activated.
Code:
from pyautogui import *
import pyautogui
import time
import keyboard
import random
import win32api, win32con
import win32com.client as comclt
wsh = comclt.Dispatch("WScript.Shell")
wsh.AppActivate("Crystal Client (v1.8.9-d9d3740/main)")
wsh.SendKeys("{Esc}")
keyboard.press('space')
keyboard.press('space')
keyboard.press('space')

import pyautogui
for i in range(1):
pyautogui.press('space')
or more simply, since PyAutoGUI lets you specify the number of presses you want to perform:
import pyautogui
pyautogui.press('space', presses=2)

The docs for the keyboard module suggest send as used for "single key (e.g. 'space') or multi-key, multi-step hotkey" and I would put this in the multi-step hotkey realm so replacing
keyboard.press()
with
keyboard.send()
allows you to take advantage of the built in press-and-release api
keyboard.send('space', do_press=True, do_release=True)

How can I send keystrokes and mouse movement to a specific PID?

How can I send keystrokes and mouse movements to a specific running program through its PID. I've used both pywinauto and pynput, and they work great, but I want to send keys to a program that is not in focus. I found this question: How to I send keystroke to Linux process in Python by PID? but it never explains what filePath is a path to.
If you could help solve for this example, that would be great! I want to send the "d" key to an open Minecraft tab for 10 seconds, and then send the "a" key for the next 10 seconds and stop. I would need this to be able to run in the background, so it could not send the keys to the computer as a whole, but only to the Minecraft tab. I am on Windows 10 by the way.
Any help would be appreciated!

Pretty sure you won't be able to, at least not easily let me explain a little bit how all of this works.
Lets start with the hardware and os, the OS has certain functions to read the input you give the computer. This input goes into a "pipe", the OS is reading input, and putting into the pipe, on the other side of the pipe there may be an application running, or it may not. The OS typically manages this (which app to put on the pipe listening) by defining which app/window is active. Apps access this pipe with the API given by the OS, they read the input and decide on it.
The libraries you cited above, change the values of the keyboard and mouse, in other words, they make the OS read other values, not the real ones, then the OS puts them in the "pipe", and are read by the app that is listening on the pipe (the one active). Some apps have their own API's for this, but I would guess Minecraft doesn't. If they don't have an API, what can you do? well, as I said, nothing easy, first of all "hacking" the app, in other words change it to listen to some other input/output rather than the one given by the OS, (this would be you making your own API). The other one would be you changing the OS, which would also be extremely hard, but maybe a tiny bitty easier. It also depends on your OS, I think Microsoft does offer input injection api's
So, simple options, first, run a VM with a GUI and use pywinauto, pyautogui, etc. The other option would be if you can run it in the browser, do so, and use something like Selenium to automate the input.
Quick note, why does selenium works and the browser can read input in the background? Easy, it's not, it just executes the code it would execute if it would have read the input! javascript, cool isn't

With ahk you can do this with Python+AutoHotkey
pip install ahk
pip install "ahk[binary]"
from ahk import AHK
from ahk.window import Window
ahk = AHK()
win = Window.from_pid(ahk, pid='20366')
win.send('abc') # send keys directly to the window
Note that some programs may simply ignore inputs when they are not in focus. However, you can test this works in general even when not in focus by testing with a program like notepad
Full disclosure: I author the ahk library.

Send keys to background window/application (Python)

I'm currently working on a Selenium program that requires I open up a system file-selector dialog. Unfortunately it's impossible to circumvent this by just sending keys to a webpage attribute, as I have to select a button with no file-acceptance, which automatically opens up the file-selector dialog.
I believe the only solution is to send keys through the system itself to the file selector. Unfortunately, the method I'm currently using (below) requires that the window be active for it to receive the keys.
I used the pynput library in order to send the keys on my first iteration. The pynput documentation for keyboards can be found here:
https://pynput.readthedocs.io/en/latest/keyboard.html
from pynput.keyboard import Key, Controller
import os, time
file = "723583.jpg" #this is a local directory file
keyboard = Controller()
keyboard.type(os.path.abspath(file))
time.sleep(5) #Please ignore the bad style of using these sleeps
keyboard.press(Key.enter) #They're just for testing
time.sleep(3)
keyboard.press(Key.enter)
time.sleep(3)
On other Stackoverflow questions, I've found solutions for Windows computers (e.g. using win32), though I haven't been able to find anything for MacOS, which I'm currently using, or an equivalent multi-platform solution. Does anybody know how I might be able to send keys to a background application as such?

How get input device path with Xlib in Xorg?

There is some way to get the device path of a mouse and keyboard using Xlib based in a looping with XNextEvent? I need to know what /dev/input/event* generates a event specific like mouse press and keyboard key F1 press.
I'm using evdev for input devices in Xorg, I searched documentation and cannot find a way.
I accept too suggestion of some app that I can use to identify input device based in events like mouse press and keyboard press.
Thanks.
Edit: If there is a way to make this using another lib, preferable one with bindings for python, please let me know.

I realize that Xlib do not have a method to get the file descriptor of the input devices, so I figured out another way to resolve this case, is not ready yet, but apparently is the best way to follow, just posting here for someone with the same problem.
I'm using the module python-evdev (installed with pip in ubuntu), with this module I can monitor the devices is /dev/input/event*, so I just need to start a thread for each device that I previous identified which is a mouse or keyboard (using the module evdev and checking if device have "capabilities(verbose=True)" with event codes like ecodes.KEY_F1 and ecodes.BTN_MOUSE), and when a event occur, write to a shared variable, that I should monitor.
For the graphic interface running in Xorg, without Windows Managers, I using python-glade2, works like a charm, I run a Xorg with python-glade2 app using xinit.

Simulating Key Press event using Python for Linux

I am writing a script to automate running a particular model. When the model fails, it waits for a user input (Enter key). I can detect when the model has failed, but I am not able to use python (on linux) to simulate a key press event. Windows has the SendKeys library to do this but I was wondering if there is a similar library for python on linux.
Thanks!

Have a look at this https://github.com/SavinaRoja/PyUserInput
its cross-platform control for mouse and keyboard in python
Keyboard control works on X11(linux) and Windows systems. But no mac support(when i wrote this answer).
from pykeyboard import PyKeyboard
k = PyKeyboard()
# To Create an Alt+Tab combo
k.press_key(k.alt_key)
k.tap_key(k.tab_key)
k.release_key(k.alt_key)

A more low-level approach would be to create an uinput device from which you would then inject input events into the linux input subsystem. Consider the following libraries:
python-uinput
evdev
Example of sending <enter> with the latter:
from evdev import uinput, ecodes as e
with uinput.UInput() as ui:
ui.write(e.EV_KEY, e.KEY_ENTER, 1)
ui.write(e.EV_KEY, e.KEY_ENTER, 0)
ui.syn()

If the "model" is running graphically (with the X window system), the already-suggested xsendkey is a possibility, or xsendkeycode. If it's running textually (in a terminal window), then pexpect.

I recommend PyAutoGui. It's ridiculously simple to use, it's cross-platform and it's for Python 3 and 2.
In the linked page are listed the dependences and some code examples.

http://people.csail.mit.edu/adonovan/hacks/xsendkey.html

As many of the solutions I have found in this and in another well ranked SO response were either deprecated (PyUserInput) or using evdev, which failed (UInputError: "/dev/uinput" cannot be opened for writing) the simplest solution for me using Linux was pynput. One example directly from their docs:
from pynput.keyboard import Key, Controller
keyboard = Controller()
# Press and release space
keyboard.press(Key.space)
keyboard.release(Key.space)
# Type a lower case A; this will work even if no key on the
# physical keyboard is labelled 'A'
keyboard.press('a')
keyboard.release('a')
# Type two upper case As
keyboard.press('A')
keyboard.release('A')
with keyboard.pressed(Key.shift):
keyboard.press('a')
keyboard.release('a')
# Type 'Hello World' using the shortcut type method
keyboard.type('Hello World')
It worked like a charm!