str_analysys has empty
when you run your function it print respective message and return None. on line 18 you print that None
return statement at the end so it will return None. Even without explicit return any function will return None if you don't specify return value. You assign that to checkwhen you run your function it print respective message and return None. on line 18 you print that None
If you can't explain it to a six year old, you don't understand it yourself, Albert Einstein
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs
How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs