is_numeric.py

# Given a string, return True if it
# is a numeric data type, False otherwise


def is_numeric(input_str):

    data_types = [
        int,
        float,
        complex,
        lambda T: int(T, 2),  # binary
        lambda T: int(T, 8),  # octal
        lambda T: int(T, 16),  # hex
    ]

    for dtype in data_types:
        try:
            dtype(input_str)
            return True
        except ValueError:
            pass
    return False


tests = [
    "0",
    "0.",
    "00",
    "123",
    "0123",
    "+123",
    "-123",
    "-123.",
    "-123e-4",
    "-.8E-04",
    "0.123",
    "(5)",
    "-123+4.5j",
    "0b0101",
    " +0B101 ",
    "0o123",
    "-0xABC",
    "0x1a1",
    "12.5%",
    "1/2",
    "½",
    "3¼",
    "π",
    "Ⅻ",
    "1,000,000",
    "1 000",
    "- 001.20e+02",
    "NaN",
    "inf",
    "-Infinity",
]

for s in tests:
    print(s, "---", is_numeric(s))

"""
OUTPUT:

0 --- True
0. --- True
00 --- True
123 --- True
0123 --- True
+123 --- True
-123 --- True
-123. --- True
-123e-4 --- True
-.8E-04 --- True
0.123 --- True
(5) --- True
-123+4.5j --- True
0b0101 --- True
 +0B101  --- True
0o123 --- True
-0xABC --- True
0x1a1 --- True
12.5% --- False
1/2 --- False
½ --- False
3¼ --- False
π --- False
Ⅻ --- False
1,000,000 --- False
1 000 --- False
- 001.20e+02 --- False
NaN --- True
inf --- True
-Infinity --- True
"""