cython

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# ticket: t254
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def double_target(a, b):
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    """
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    >>> double_target(0, 4)
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    at 0.0
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    at 1.0
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    at 2.0
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    at 3.0
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    4.0
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    """
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    cdef double x
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    for x from a <= x < b:
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        print u"at", x
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    return x
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def double_step(a, b, dx):
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    """
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    >>> double_step(0, 2, .5)
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    at 0.0
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    at 0.5
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    at 1.0
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    at 1.5
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    2.0
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    """
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    cdef double x
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    for x from a <= x < b by dx:
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        print u"at", x
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    return x
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def double_step_typed(a, b, double dx):
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    """
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    >>> double_step_typed(0, 2, .5)
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    at 0.0
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    at 0.5
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    at 1.0
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    at 1.5
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    2.0
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    """
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    cdef double x
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    for x from a <= x < b by dx:
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        print u"at", x
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    return x
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def double_step_py_target(a, b, double dx):
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    """
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    >>> double_step_py_target(0, 2, .5)
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    at 0.0
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    at 0.5
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    at 1.0
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    at 1.5
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    2.0
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    """
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    cdef object x
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    for x from a <= x < b by dx:
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        print u"at", x
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    return x
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def int_step_py_target(a, b, int dx):
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    """
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    >>> int_step_py_target(0, 2, 1)
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    at 0
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    at 1
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    2
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    """
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    cdef object x
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    for x from a <= x < b by dx:
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        print u"at", x
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    return x
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