Comparing Python to Perl ( assuming equal experience with both ):
If you are a good programmer, you will write good Perl and Python code. If you are a bad programmer, you will likely write terribly horrendous Perl code and slightly less horrible Python code.
If you are an excellent programmer, you will write excellent Perl and good Python code. The Python language limits your ability to write excellent code, which also limits your ability to write horrendous code.
If you are a good programmer, you will write good Perl and Python code. If you are a bad programmer, you will likely write terribly horrendous Perl code and slightly less horrible Python code.