Screener tweaks

[ericpien]

• Setting Body to Screener returns the Screener Object to enable method chaining.

  • i.e. r = yf.Screener().set_predefined_body("day_gainers").response
  • Addresses: Change Screener.set_predefined_body and Screener.set_body to respond with the class #2158

• Limit query size to 250 and raise error if larger. This also avoids unnecessary network calls and makes the issue clearer.

  • Addresses: Screener: set_body -> size = 10000 #2165 and Screener #2152 (comment)

• Unit test and doc updates for both changes

[ValueRaider]

When you say Setting Body to Screener returns the Screener object, do you mean Screener.set_predefined_body() returns the Screener object?

[ericpien]

When you say Setting Body to Screener returns the Screener object, do you mean Screener.set_predefined_body() returns the Screener object?

Yes, and any other functions that set the body: set_default_body(), set_predefined_body(), set_body(), patch_body() so user can chain methods right after setting the body.