Thus the effort required to use Assembly is equal to the effort required to use C or Python, with more or less equal boundaries in terms of the number of words and terms you will learn for any particular language. You can take two days to learn nothing but one language, and another two days to learn nothing but another language; the degree to which the progress of both of these periods is 'equal' is driven not by the words or language features themselves, but instead by your personal interest.
The average assembly programmer has to construct a taxonomy as equal in terms of effort as that of a Python programmer.
Now, bare with me here, because while I truly believe that 'all languages are flat', it is also a 'truism' that "personal interest drives the peaks in the effort curve".
That is to say, if you're not interested in Assembly, but you are interested in Python, it is your interest - not language features - that will be what drives the peaks and shallows in terms of the 'effort graph' in learning either Python or Assembly. This is not a function of the language, but instead of personal interest. I don't believe there are, for example "stupid people who can never learn Assembly and therefore must learn Python while there are 'more intelligent' people who easily become more proficient in Assembly" .. instead it is: "this person could learn either language, but their personal interest inclines them towards one over the other".
All languages are equal. Not all interests are equal. The degree of interest in a language drives its effectiveness in usage over that of another language.