# from http://docs.python.org/reference/lexical_analysis.html#literals

re.compile("[A-Za-z_]"       # letter or underscore
           "[A-Za-z0-9_]*"   # letter, digit or underscore
          )
7     2147483647                        0177
3L    79228162514264337593543950336L    0377L   0x100000000L
      79228162514264337593543950336             0xdeadbeef

3.14    10.    .001    1e100    3.14e-10    0e0

3.14j   10.j    10j     .001j   1e100j  3.14e-10j

2 + 1j

3.5e+54 - 2.5e-13j