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MT5 Python last_error()

functionlast_error()MetaTrader5 Python packageConnection

Returns the code and description of the last error raised by a call to the package. The codes are the package's own, not the terminal's.

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Independent and unofficialmql5.comchecked

This is a Python function, not an HTTP endpoint. It has no method, no path and no address to send a request to: the package talks to a MetaTrader 5 terminal running on the same computer.

Signature

The form of the call on the vendor's page, with the vendor's comments taken out.

last_error()

Arguments

The function takes no arguments.

Return value

Type
tuple
What comes back
The last error's code and its description. The page says it works like GetLastError() in MQL5 but uses codes of its own, and lists them: RES_S_OK is 1 and the failures are negative numbers.

Sample

Written by this site from the signature and arguments recorded on this page. It has not been run against a terminal, a server or an account, and the values in it are placeholders. No credential is typed into it: where one is needed it is read from an environment variable on your own machine. Nothing is entered on this site.

import MetaTrader5 as mt5

if not mt5.initialize():
    code, description = mt5.last_error()
    raise SystemExit(f"initialize() failed: {code} {description}")

mt5.shutdown()

Return codes documented for this function

The page for last_error() lists the package's own codes with their constants, and those are what the first value of the returned tuple holds. Each one recorded here is below. mql5.comchecked