Question: If I write a python script, anyone can simply point an editor to it and read it. But for programming written in C, one would have to use decompilers and hex tables and such. Why is that? I mean I simply can't open up the Safari web browser and look at its code.

Answer: 
because C code is complied to object (machine) code and python code is compiled into an intermediate byte code. I am not sure if you are even referring to the byte code of python - you must be referring to the source file itself which is directly executable (hiding the byte code from you!). C needs to be compiled and linked.
Not all C programs require decompilers. There's lots of C code distributed in source form. And some Python programs *do* require decompilers, if distributed as bytecode (.pyc files).

But, to the extent that your assumptions are valid, it's because C is a [compiled language](http://en.wikipedia.org/wiki/Compiled_language) while Python is an [interpreted language](http://en.wikipedia.org/wiki/Interpreted_language).