connect_and_start()

After creating the class object reference with sync wrapper, the connect_and_start() function initializes the connection with the Trader Workstation on the given host and port values. Identical to EClient’s connect() function, connect_and_start() supports arguments for host, port, and client_id.

Request Arguments

Response Object

While it is not necessary to handle the response from connect_and_start(), the function will return the result of EClient.isConnected() for connection validation.

The function call will return a single boolean value, True or False, in reference to the connection status at the time of reference.

Developers may look to implement code such as this that will gracefully handle the connection procedure should it fail to connect rather than proceeding with the rest of the code implementation.

Example Implementation

from ibapi.sync_wrapper import TWSSyncWrapper
app = TWSSyncWrapper(timeout=30)
# Connect to TWS
if not app.connect_and_start(host="127.0.0.1", port=7496, client_id=0):
    # If the connection fails and False is returned, notify the user and gracefully exit the application.
    print("Failed to connect to TWS")
    exit(1)
else:
    # If the connection succeeded, notify the user.
    print("Connected to TWS")