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Commit a9058ee

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author
Amogh Singhal
authored
Create is_numeric.py
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‎is_numeric.py‎

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# Given a string, return True if it
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# is a numeric data type, False otherwise
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def is_numeric(input_str):
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data_types = [int, float, complex,
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lambda T: int(T, 2), # binary
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lambda T: int(T, 8), # octal
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lambda T: int(T, 16) # hex
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]
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for dtype in data_types:
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try:
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dtype(input_str)
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return True
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except ValueError:
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pass
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return False
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tests = [
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'0', '0.', '00', '123', '0123', '+123', '-123', '-123.', '-123e-4', '-.8E-04',
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'0.123', '(5)', '-123+4.5j', '0b0101', ' +0B101 ', '0o123', '-0xABC', '0x1a1',
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'12.5%', '1/2', '1⁄2', '31⁄4', 'π', 'XII', '1,000,000', '1 000', '- 001.20e+02',
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'NaN', 'inf', '-Infinity']
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for s in tests:
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print(s,"---",is_numeric(s))
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"""
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OUTPUT:
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0 --- True
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0. --- True
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00 --- True
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123 --- True
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0123 --- True
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+123 --- True
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-123 --- True
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-123. --- True
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-123e-4 --- True
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-.8E-04 --- True
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0.123 --- True
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(5) --- True
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-123+4.5j --- True
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0b0101 --- True
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+0B101 --- True
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0o123 --- True
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-0xABC --- True
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0x1a1 --- True
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12.5% --- False
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1/2 --- False
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1⁄2 --- False
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31⁄4 --- False
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π --- False
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XII --- False
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1,000,000 --- False
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1 000 --- False
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- 001.20e+02 --- False
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NaN --- True
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inf --- True
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-Infinity --- True
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"""

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