Robot Framework RIDE使用Python SendKeys发送CTRL+C/V报错求助

Hey there! Let's fix that SendKeys TypeError you're hitting in RIDE and get your copy-paste automation working smoothly.

Why the Error Happens #

The TypeError: argument 1 must be char, not unicode is almost certainly because you're using an older version of the SendKeys library built for Python 2. In Python 2, strings were byte-based ("char"), but Python 3 uses Unicode strings by default—so when you pass ^C (a Unicode string) to the old SendKeys, it throws a fit.

Fix 1: Use a Python 3-Compatible SendKeys Library #

First, uninstall the outdated SendKeys and install the updated version that supports Unicode:

pip uninstall SendKeys
pip install SendKeys-Python3

Fix 2: Properly Implement Copy-Paste (With Clipboard Read) #

Instead of relying on SendKeys ^V to paste into a RIDE variable (which depends on window focus and timing), it's more reliable to read directly from the system clipboard. Here's a complete RIDE test case example using SendKeys-Python3 and pyperclip (a simple clipboard library):

First, install pyperclip:

pip install pyperclip

Then set up your RIDE test case:

*** Settings ***
Library    SendKeys
Library    Pyperclip
Library    BuiltIn

*** Test Cases ***
Copy Text from App to RIDE Variable
    # Step 1: Switch to your target application window (adjust if needed, e.g., use window title)
    Send Keys    {ALT+TAB}
    # Step 2: Send Ctrl+C to copy the selected text
    Send Keys    ^c
    # Step 3: Wait a split second to ensure the copy completes
    Sleep    0.5
    # Step 4: Read the clipboard content directly into a RIDE variable
    ${copied_text}=    Execute Python Script    return pyperclip.paste()
    # Verify the result
    Log    Successfully copied: ${copied_text}
    # Optional: Switch back to RIDE and paste if needed
    Send Keys    {ALT+TAB}
    Send Keys    ^v

If You Really Want to Use SendKeys ^V #

If you need to paste into a specific input field in RIDE (rather than storing directly to a variable), make sure you first focus on that input field, then send ^v. The updated SendKeys-Python3 will handle the Unicode string correctly, so Send Keys ^v won't throw the TypeError anymore.

Give this a shot—this should resolve the type error and get your automation working as expected!

内容的提问来源于stack exchange，提问作者RJA