Python can be the toolset.

It is a high-level language that you can use to write proof-of-concepts, analyze datasets, etc, etc... Writing the same things in some lower-level language makes these things boresome, error-prone and less understandable for others.

C is the knowledge.

Only being literate in C, you can understant how data structures and algorithms are represented at the low level where the interesting stuff happens. Things like buffer overruns, stack corruptions and likes, cannot be understood (and even less, discovered and analyzed) without knowledge of C.

Python can be the toolset.

It is a high-level language that you can use to write proof-of-concepts, analyze datasets, etc, etc... Writing the same things in some lower-level language makes these things boresome, error-prone and less understandable for others.

C is the knowledge.

Only being literate in C, you can understand how data structures and algorithms are represented at the low level where the interesting stuff happens. Things like buffer overruns, stack corruptions and likes, cannot be understood (and even less, discovered and analyzed) without knowledge of C.