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import math

INF = float("inf")
MINUS_INF = float("-inf")
NaN = float("NaN")


def floatToGoString(d):
    d = float(d)
    if d == INF:
        return '+Inf'
    elif d == MINUS_INF:
        return '-Inf'
    elif math.isnan(d):
        return 'NaN'
    else:
        s = repr(d)
        dot = s.find('.')
        # Go switches to exponents sooner than Python.
        # We only need to care about positive values for le/quantile.
        if d > 0 and dot > 6:
            mantissa = f'{s[0]}.{s[1:dot]}{s[dot + 1:]}'.rstrip('0.')
            return f'{mantissa}e+0{dot - 1}'
        return s