MetaTrader 5 Python User Group - how to use Python in Metatrader - page 33

[Roman]

jaffer wilson:

How do you change the MetaEditor skin? Please let me know.

I used a dark Windows10 theme
Look carefully on the website for compatibility with your version of Windows.
If the theme doesn't install correctly, you could lose your operating system.
So first install your version of Windows on VirtualBox, and try it out on a virtual machine.
If it's OK, you can then install it on the production machine.

MetaEditor colours I have customized

Elements	Text	Background
Text	200,200,170	35,35,35
Selected text	255,255,255	61,85,109
Indent	Default	50,50,50
Keywords	66,142,200	Default
Comments	128,128,128	Default
Numbers	181,206,168	Default
Operators	192,192,192	Default
Strings	214,157,133	Default
Macros	190,183,255	Default
Functions and entry points	216,16,223	Default
Indicators	100,200,70	Default
Predefined variables	255,140,0	Default
Input variables	210,105,30	Default
Non ASCII characters	255,20,147	Default

This is what I ended up with

[Vladimir Karputov]

I installed Visual Studio 2019 (immediately noted something about Python) and oh wonder! Now the scripts work in both Studio and MetaEditor!

[Vladimir Perervenko]

Renat Fatkhullin:
Is python enabled in visual studio?

Because of the zoo of pythons deployed indirectly or automatically by different systems, it is easy to get libraries installed in another python copy and then try to run other copies.

Sort out the pythons, please. Those who move to python must be prepared to spend the rest of their lives battling with libraries, dependencies, and incompatibilities.

This is the fate of a pythonist - to build an environment of libraries and pray that some library update doesn't mess up another unknown number of libraries.

In general, I don't understand why you support integration of Python and actively reject R. Although there is "kolkhoz", as you put it, but there is more order there. And as for the current state, Python is used in R as native, but it is harder to reverse it.

Just a thought out loud.

Good luck

[Renat Fatkhullin]

Vladimir Perervenko:

In general, it is not clear why you support integration of Python and actively reject R. Although there is "kolkhoz" there, as you put it, but there is more order. As for the current state, Python is used in R as native, but the reverse is more difficult.

The future is played out very quickly and simply.

R is lost.

[Renat Fatkhullin]

Vladimir Karputov:
I installed Visual Studio 2019 (immediately noted something about Python) and oh wonder! Now the scripts work in both Studio and MetaEditor!

We'll figure it out, just in conjunction with a complete rewrite of the library.

Apparently they left some extra stuff in the package.

[Roman]

Renat Fatkhullin:

We'll sort it out, just in conjunction with a complete rewrite of the library.

It must have been left out of the package.

Parallelization of njit (parallel=True) doesn't work, there are errors
parallel=False script runs

#!/usr/bin/env python3

from numba import njit, prange
import time


@njit(parallel=True, fastmath=True, cache=False)
def calc_pi(num_steps):
    x, sum1 = 0.0, 0.0
    step1 = 1.0 / num_steps
    for i in prange(num_steps):
        x = (i + 0.5) * step1
        sum1 = sum1 + 4.0 / (1.0 + x * x)
    return sum1 * step1


calc_pi(1)  # minus jit compilation time
start_time = time.time()
pi = calc_pi(1000000000)
msvcr = time.time() - start_time

print(f"--- {msvcr} seconds --- The value of PI is {pi}")

[jaffer wilson]

Roman :

Paralleling njit (parallel=True) does not work, errors are thrown
parallel=False script runs

What error is being thrown?

[Roman]

jaffer wilson:

Which error is being thrown?

There are a lot of them, I don't know what they may be related to.
I tried to run the code from the python command line, same errors.
It turns out that the problem is in the installed python, maybe a package is needed, but does not write which one.
Python was installed from the installer, which is downloaded from Tools -> Settings -> Compilers

[Renat Fatkhullin]

Roman:

There are a lot of them, I don't understand what it might be about.

It has nothing to do with Metatrader.

The error is also when running the script separately with parallelism enabled.

[Roman]

Renat Fatkhullin:

This has nothing to do with Metatrader.

The error also occurs when running the script separately with parallelism enabled.

Yes it is, errors appear on windows python, python is installed from the compilers tab.
On linux I have Spyder and VSCode environment, this code runs without problems and errors there.