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socket.SocketType

creating sockets

The base socket class from _socket: fine for isinstance(), but not the class that socket.socket() creates.

Syntax

isinstance(obj, socket.SocketType)

isinstance(sock, socket.SocketType) is true, yet type(sock) is socket.SocketType is false: objects are made by the subclass socket.socket. A bare SocketType instance is cut down, with no makefile() and no with support, so do not create sockets from it. Subclass and instantiate socket.socket; SocketType is only good for type checks.

Examples

import socket
with socket.socket() as s:
    print(isinstance(s, socket.SocketType))  # → True
    print(type(s) is socket.SocketType)  # → False
    print(type(s) is socket.socket)  # → True
print(socket.SocketType is socket.socket)  # → False

See also

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