PyCharm中类属性类型检查未触发警告的问题咨询

Hey there, let's get to the bottom of why PyCharm isn't flagging that type mismatch in your code. Here are the key steps to enable those warnings:

• Turn on the relevant inspection in PyCharm
  Open your PyCharm settings via File > Settings (or PyCharm > Settings on macOS). Navigate to Editor > Inspections > Python > Type checking issues. Look for the Incompatible types in assignment inspection—make sure it’s checked, and set its severity level to something visible like Warning or Weak Warning. This tells PyCharm to alert you when you assign a value that doesn’t match the declared type hint.

• Confirm type checking is active for your project
  Sometimes global type checking might be disabled. Double-check that the overall Type checking issues group isn’t turned off in the same settings section. Also, ensure your project uses a Python interpreter version that supports variable annotations (Python 3.6+ is required for syntax like text: str).

• Optional: Use stricter class definitions for extra enforcement
  If you want even more robust type checks, consider using dataclasses or libraries like attrs. Converting your class to a dataclass will make PyCharm (and static checkers like mypy) enforce type hints more strictly:

  from dataclasses import dataclass
  
  @dataclass
  class Category:
      text: str
  
  a = Category()
  a.text = 1.5454654  # Now you’ll see a clear warning right away
  

  Even without this, the first two steps should get the basic type mismatch warning working.

Once you adjust these settings, PyCharm should immediately highlight the line a.text = 1.5454654 with a warning about assigning a float to a string-typed attribute.

内容的提问来源于stack exchange，提问作者SexyMF