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float_parse_doubleprec.py

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# test parsing of floats, requiring double-precision

# very large integer part with a very negative exponent should cancel out

print(float('9' * 400 + 'e-100'))

print(float('9' * 400 + 'e-200'))

print(float('9' * 400 + 'e-400'))

# many fractional digits

print(float('.' + '9' * 400))

print(float('.' + '9' * 400 + 'e100'))

print(float('.' + '9' * 400 + 'e-100'))

# tiny fraction with large exponent

print('%.14e' % float('.' + '0' * 400 + '9e100'))

print('%.14e' % float('.' + '0' * 400 + '9e200'))

print('%.14e' % float('.' + '0' * 400 + '9e400'))

# ensure that accuracy is retained when value is close to a subnormal

print(float('1.00000000000000000000e-307'))

print(float('10.0000000000000000000e-308'))

print(float('100.000000000000000000e-309'))