Python rstring_to_float Exemples

Exemple #1

def string_to_float(s):
    """
    Conversion of string to float.
    This version tries to only raise on invalid literals.
    Overflows should be converted to infinity whenever possible.

    Expects an unwrapped string and return an unwrapped float.
    """

    s = strip_spaces(s)

    if not s:
        raise ParseStringError("empty string for float()")

    low = s.lower()
    if low == "-inf" or low == "-infinity":
        return -INFINITY
    elif low == "inf" or low == "+inf":
        return INFINITY
    elif low == "infinity" or low == "+infinity":
        return INFINITY
    elif low == "nan" or low == "+nan":
        return NAN
    elif low == "-nan":
        return -NAN

    try:
        return rstring_to_float(s)
    except ValueError:
        raise ParseStringError("invalid literal for float()")

Exemple #2

Fichier : strutil.py Projet : Debug-Orz/Sypy

def string_to_float(s):
    """
    Conversion of string to float.
    This version tries to only raise on invalid literals.
    Overflows should be converted to infinity whenever possible.

    Expects an unwrapped string and return an unwrapped float.
    """

    s = strip_spaces(s)

    if not s:
        raise ParseStringError("empty string for float()")


    low = s.lower()
    if low == "-inf" or low == "-infinity":
        return -INFINITY
    elif low == "inf" or low == "+inf":
        return INFINITY
    elif low == "infinity" or low == "+infinity":
        return INFINITY
    elif low == "nan" or low == "+nan":
        return NAN
    elif low == "-nan":
        return -NAN

    try:
        return rstring_to_float(s)
    except ValueError:
        raise ParseStringError("invalid literal for float()")

Exemple #3

Fichier : rstr.py Projet : Debug-Orz/Sypy

    def ll_float(ll_str):
        from pypy.rpython.annlowlevel import hlstr
        from pypy.rlib.rfloat import rstring_to_float
        s = hlstr(ll_str)
        assert s is not None

        n = len(s)
        beg = 0
        while beg < n:
            if s[beg] == ' ':
                beg += 1
            else:
                break
        if beg == n:
            raise ValueError
        end = n-1
        while end >= 0:
            if s[end] == ' ':
                end -= 1
            else:
                break
        assert end >= 0
        return rstring_to_float(s[beg:end+1])

Exemple #4

Fichier : rstr.py Projet : nipengadmaster/pypy

    def ll_float(ll_str):
        from pypy.rpython.annlowlevel import hlstr
        from pypy.rlib.rfloat import rstring_to_float
        s = hlstr(ll_str)
        assert s is not None

        n = len(s)
        beg = 0
        while beg < n:
            if s[beg] == ' ':
                beg += 1
            else:
                break
        if beg == n:
            raise ValueError
        end = n - 1
        while end >= 0:
            if s[end] == ' ':
                end -= 1
            else:
                break
        assert end >= 0
        return rstring_to_float(s[beg:end + 1])

Exemple #5

def load_float(loader):
    if readchr(loader) != TYPE_FLOAT:
        raise ValueError("expected a float")
    length = ord(readchr(loader))
    s = readstr(loader, length)
    return rstring_to_float(s)

Exemple #6

Fichier : test_lltyped.py Projet : njues/Sypy

 def llf(i):
     s = ['42.3', '123.4'][i]
     return rstring_to_float(s)

Exemple #7

Fichier : converter.py Projet : MichaelBlume/pypy

 def __init__(self, space, default):
     if default:
         self.default = rffi.cast(self.c_type, rfloat.rstring_to_float(default))
     else:
         self.default = rffi.cast(self.c_type, 0.)

Exemple #8

Fichier : converter.py Projet : MichaelBlume/pypy

 def __init__(self, space, default):
     if default:
         fval = float(rfloat.rstring_to_float(default))
     else:
         fval = float(0.)
     self.default = r_singlefloat(fval)

Exemple #9

Fichier : rmarshal.py Projet : junion/butlerbot-unstable

def load_float(loader):
    if readchr(loader) != TYPE_FLOAT:
        raise ValueError("expected a float")
    length = ord(readchr(loader))
    s = readstr(loader, length)
    return rstring_to_float(s)