使用Kivy开发Python计算器时Button控件初始化报错求助

Looking at your error log, the root cause is crystal clear: you’re passing a non-existent property text_ (with a trailing underscore) when creating a Kivy Button instance, but the valid property for setting button text is text (no trailing underscore).

What’s Causing the Error? #

The traceback explicitly calls out the issue:

TypeError: Properties ['text_'] passed to init may not be existing property names. Valid properties are [..., 'text', ...]

Kivy’s Button widget inherits from Label, which uses the text attribute to control displayed text. Your typo (text_ instead of text) breaks the widget initialization process because Kivy doesn’t recognize this invalid property name.

How to Fix It #

Head to line 27 of your main.py (as referenced in the log) where you create the Button, and correct the property name:

Incorrect Code:

button = Button(
    text_="1",  # Trailing underscore makes this invalid
    # Other button properties...
)

Correct Code:

button = Button(
    text="1",  # Use the valid 'text' property
    # Other button properties...
)

Next Steps #

After fixing this typo, re-run your calculator project. This specific initialization error should be resolved immediately. If you hit other issues later, double-check for similar property name typos—Kivy strictly enforces matching valid widget properties.

内容的提问来源于stack exchange，提问作者Max Legav