Sending a One-Time WeChat Reminder with Python

The original script sent a message forever every half-second. That behavior is spam, can harass the recipient, and may cause account restrictions. This safer adaptation sends exactly one message after explicit confirmation and is suitable only for a contact who has agreed to receive the automated reminder.

itchat depends on WeChat web-login behavior that may no longer be available for many accounts, and unofficial automation may conflict with platform terms. Prefer an official API for production use.

import itchat

print("Scan the displayed QR code to sign in")
itchat.auto_login(hotReload=False)

remark_name = input("Contact remark name: ").strip()
message = input("One-time reminder text: ").strip()

matches = itchat.search_friends(remarkName=remark_name)
if not matches:
    raise SystemExit("No matching contact was found")

confirmation = input(
    f"Send this message once to {remark_name}? Type SEND to confirm: "
).strip()

if confirmation == "SEND":
    itchat.send_msg(
        msg=message,
        toUserName=matches[0]["UserName"]
    )
    print("Message sent once")
else:
    print("Cancelled")

Do not turn this into an infinite loop, use it for bulk messaging, evade rate limits, or message people without consent. Never automate sensitive content or credentials through an unofficial client.