[necovek]

Open parentheses and "multi-line" strings are simply Python's way to allow a single statement to span multiple lines in a nicer way: incomplete expressions continue across the newline (you can also do that with a common Unix way of escaping the newline — backslash right before you start the new line). FWIW, even """ notation does not require a string to be multi-line — it mostly allows using less escaping for things like newlines but also quotes.

A preferred way to chain methods is to store values in descriptively named intermediate variables: it would also ease debugging as you'll get a direct pointer to the line that is problematic. Though, TBH, that's probably bad API design (I know it's common with DB query syntax, but that's attempting to turn SQL query construction into objects when they really aren't).

Python, like most languages, doesn't really stop you from doing crazy stuff. But also like most languages, it can be done really well.