def init_printing(pretty_print=True, order=None, use_unicode=None, wrap_line=None, no_global=False):
    """Initializes pretty-printer depending on the environment. """
    from sympy.printing.printer import Printer

    if pretty_print:
        from sympy.printing import pretty as stringify_func
    else:
        from sympy.printing import sstrrepr as stringify_func

    if not no_global:
        Printer.set_global_settings(order=order, use_unicode=use_unicode, wrap_line=wrap_line)
    else:
        _stringify_func = stringify_func

        if pretty_print:
            stringify_func = lambda expr: _stringify_func(expr, order=order, use_unicode=use_unicode, wrap_line=wrap_line)
        else:
            stringify_func = lambda expr: _stringify_func(expr, order=order)

    try:
        import IPython
    except ImportError:
        _init_python_printing(stringify_func)
    else:
        ip = IPython.ipapi.get()

        if ip is not None:
            _init_ipython_printing(ip, stringify_func)
        else:
            _init_python_printing(stringify_func)

    def __init__(self, profile=None):
        Printer.__init__(self)
        self.emptyPrinter = lambda x : prettyForm(xstr(x))

        self._settings = {
                "full_prec" : "auto",
                "use_unicode" : True,
        }

        if profile is not None:
            self._settings.update(profile)

 def doprint(self, expr):
     """
     Prints the expression as MathML.
     """
     mathML = Printer._print(self, expr)
     unistr = mathML.toxml()
     xmlbstr = unistr.encode('ascii', 'xmlcharrefreplace')
     res = xmlbstr.decode()
     return res

    def __init__(self, settings=None):
        Printer.__init__(self, settings)
        from xml.dom.minidom import Document,Text

        self.dom = Document()

        # Workaround to allow strings to remain unescaped
        # Based on https://stackoverflow.com/questions/38015864/python-xml-dom-minidom-please-dont-escape-my-strings/38041194
        class RawText(Text):
            def writexml(self, writer, indent='', addindent='', newl=''):
                if self.data:
                    writer.write(u'{}{}{}'.format(indent, self.data, newl))

        def createRawTextNode(data):
            r = RawText()
            r.data = data
            r.ownerDocument = self.dom
            return r

        self.dom.createTextNode = createRawTextNode

    def doprint(self, expr):
        tex = Printer.doprint(self, expr)
        xstr = ''

        if self._inline:
            if LatexPrinter.fmt_dict['fct'] == 1:
                xstr = r"%s" % tex
            else:
                xstr = r"$%s$" % tex
        else:
            xstr = r"\begin{equation*}%s\end{equation*}" % tex
        return(xstr)

def init_printing(pretty_print=True, order=None, use_unicode=None, wrap_line=None, no_global=False, ip=None):
    """Initializes pretty-printer depending on the environment. """
    from sympy.printing.printer import Printer

    if pretty_print:
        from sympy.printing import pretty as stringify_func
    else:
        from sympy.printing import sstrrepr as stringify_func

    if not no_global:
        Printer.set_global_settings(order=order, use_unicode=use_unicode, wrap_line=wrap_line)
    else:
        _stringify_func = stringify_func

        if pretty_print:
            stringify_func = lambda expr: _stringify_func(expr, order=order, use_unicode=use_unicode, wrap_line=wrap_line)
        else:
            stringify_func = lambda expr: _stringify_func(expr, order=order)

    if ip is not None and ip.__module__.startswith('IPython'):
        _init_ipython_printing(ip, stringify_func)
    else:
        _init_python_printing(stringify_func)

 def __init__(self, settings=None):
     Printer.__init__(self, settings)
     self.emptyPrinter = lambda x: prettyForm(xstr(x))

def init_printing(pretty_print=True, order=None, use_unicode=None, wrap_line=None, num_columns=None, no_global=False, ip=None):
    """
    Initializes pretty-printer depending on the environment.

    Parameters
    ==========

    pretty_print: boolean
        If True, use pretty_print to stringify;
        if False, use sstrrepr to stringify.
    order: string or None
        There are a few different settings for this parameter:
        lex (default), which is lexographic order;
        grlex, which is graded lexographic order;
        grevlex, which is reversed graded lexographic order;
        old, which is used for compatibility reasons and for long expressions;
        None, which sets it to lex.
    use_unicode: boolean or None
        If True, use unicode characters;
        if False, do not use unicode characters.
    wrap_line: boolean
        If True, lines will wrap at the end;
        if False, they will not wrap but continue as one line.
    num_columns: int or None
        If int, number of columns before wrapping is set to num_columns;
        if None, number of columns before wrapping is set to terminal width.
    no_global: boolean
        If True, the settings become system wide;
        if False, use just for this console/session.
    ip: An interactive console
        This can either be an instance of IPython,
        or a class that derives from code.InteractiveConsole.

    Examples
    ========
    >>> from sympy.interactive import init_printing
    >>> from sympy import Symbol, sqrt
    >>> from sympy.abc import x, y
    >>> sqrt(5)
    sqrt(5)
    >>> init_printing(pretty_print=True) # doctest: +SKIP
    >>> sqrt(5) # doctest: +SKIP
      ___
    \/ 5
    >>> theta = Symbol('theta') # doctest: +SKIP
    >>> init_printing(use_unicode=True) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    \u03b8
    >>> init_printing(use_unicode=False) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    theta
    >>> init_printing(order='lex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grlex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grevlex') # doctest: +SKIP
    >>> str(y * x**2 + x * y**2) # doctest: +SKIP
    x**2*y + x*y**2
    >>> init_printing(order='old') # doctest: +SKIP
    >>> str(x**2 + y**2 + x + y) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(num_columns=10) # doctest: +SKIP
    >>> x**2 + x + y**2 + y # doctest: +SKIP
    x + y +
    x**2 + y**2
    """
    from sympy.printing.printer import Printer

    if pretty_print:
        from sympy.printing import pretty as stringify_func
    else:
        from sympy.printing import sstrrepr as stringify_func

    if not no_global:
        Printer.set_global_settings(order=order, use_unicode=use_unicode, wrap_line=wrap_line, num_columns=num_columns)
    else:
        _stringify_func = stringify_func

        if pretty_print:
            stringify_func = lambda expr: _stringify_func(expr, order=order, use_unicode=use_unicode, wrap_line=wrap_line, num_columns=num_columns)
        else:
            stringify_func = lambda expr: _stringify_func(expr, order=order)

    if ip is not None and ip.__module__.startswith('IPython'):
        _init_ipython_printing(ip, stringify_func)
    else:
        _init_python_printing(stringify_func)

 def __init__(self,inline=True):
     Printer.__init__(self)
     self._inline = inline

 def __init__(self, use_unicode=None):
     Printer.__init__(self)
     self.emptyPrinter = emptyPrinter

#.........这里部分代码省略.........
    >>> from sympy import Symbol, sqrt
    >>> from sympy.abc import x, y
    >>> sqrt(5)
    sqrt(5)
    >>> init_printing(pretty_print=True) # doctest: +SKIP
    >>> sqrt(5) # doctest: +SKIP
      ___
    \/ 5
    >>> theta = Symbol('theta') # doctest: +SKIP
    >>> init_printing(use_unicode=True) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    \u03b8
    >>> init_printing(use_unicode=False) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    theta
    >>> init_printing(order='lex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grlex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grevlex') # doctest: +SKIP
    >>> str(y * x**2 + x * y**2) # doctest: +SKIP
    x**2*y + x*y**2
    >>> init_printing(order='old') # doctest: +SKIP
    >>> str(x**2 + y**2 + x + y) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(num_columns=10) # doctest: +SKIP
    >>> x**2 + x + y**2 + y # doctest: +SKIP
    x + y +
    x**2 + y**2
    """
    import sys
    from sympy.printing.printer import Printer

    if pretty_print:
        if pretty_printer is not None:
            stringify_func = pretty_printer
        else:
            from sympy.printing import pretty as stringify_func
    else:
        if str_printer is not None:
            stringify_func = str_printer
        else:
            from sympy.printing import sstrrepr as stringify_func

    # Even if ip is not passed, double check that not in IPython shell
    in_ipython = False
    if ip is None:
        try:
            ip = get_ipython()
        except NameError:
            pass
        else:
            in_ipython = (ip is not None)

    if ip and not in_ipython:
        in_ipython = _is_ipython(ip)

    if in_ipython and pretty_print:
        try:
            import IPython
            # IPython 1.0 deprecates the frontend module, so we import directly
            # from the terminal module to prevent a deprecation message from being
            # shown.
            if V(IPython.__version__) >= '1.0':

def init_printing(
    pretty_print=True,
    order=None,
    use_unicode=None,
    use_latex=None,
    wrap_line=None,
    num_columns=None,
    no_global=False,
    ip=None,
    euler=False,
    forecolor="Black",
    backcolor="Transparent",
    fontsize="10pt",
    latex_mode="equation*",
):
    """
    Initializes pretty-printer depending on the environment.

    Parameters
    ==========

    pretty_print: boolean
        If True, use pretty_print to stringify;
        if False, use sstrrepr to stringify.
    order: string or None
        There are a few different settings for this parameter:
        lex (default), which is lexographic order;
        grlex, which is graded lexographic order;
        grevlex, which is reversed graded lexographic order;
        old, which is used for compatibility reasons and for long expressions;
        None, which sets it to lex.
    use_unicode: boolean or None
        If True, use unicode characters;
        if False, do not use unicode characters.
    use_latex: string, boolean or None
        If True, use latex rendering in GUI interfaces;
        if False, do not use latex rendering; the string
        'png' specifies using latex-rendered images while
        the string 'mathjax' specifies using MathJax only.
    wrap_line: boolean
        If True, lines will wrap at the end;
        if False, they will not wrap but continue as one line.
    num_columns: int or None
        If int, number of columns before wrapping is set to num_columns;
        if None, number of columns before wrapping is set to terminal width.
    no_global: boolean
        If True, the settings become system wide;
        if False, use just for this console/session.
    ip: An interactive console
        This can either be an instance of IPython,
        or a class that derives from code.InteractiveConsole.

    Examples
    ========
    >>> from sympy.interactive import init_printing
    >>> from sympy import Symbol, sqrt
    >>> from sympy.abc import x, y
    >>> sqrt(5)
    sqrt(5)
    >>> init_printing(pretty_print=True) # doctest: +SKIP
    >>> sqrt(5) # doctest: +SKIP
      ___
    \/ 5
    >>> theta = Symbol('theta') # doctest: +SKIP
    >>> init_printing(use_unicode=True) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    \u03b8
    >>> init_printing(use_unicode=False) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    theta
    >>> init_printing(order='lex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grlex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grevlex') # doctest: +SKIP
    >>> str(y * x**2 + x * y**2) # doctest: +SKIP
    x**2*y + x*y**2
    >>> init_printing(order='old') # doctest: +SKIP
    >>> str(x**2 + y**2 + x + y) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(num_columns=10) # doctest: +SKIP
    >>> x**2 + x + y**2 + y # doctest: +SKIP
    x + y +
    x**2 + y**2
    """
    import sys
    from sympy.printing.printer import Printer

    if pretty_print:
        from sympy.printing import pretty as stringify_func
    else:
        from sympy.printing import sstrrepr as stringify_func

    # Even if ip is not passed, double check that not in IPython shell
    if ip is None:
        try:
            ip = get_ipython()
        except NameError:
#.........这里部分代码省略.........

def init_printing(pretty_print=True, order=None, use_unicode=None,
                  use_latex=None, wrap_line=None, num_columns=None,
                  no_global=False, ip=None, euler=False, forecolor='Black',
                  backcolor='Transparent', fontsize='10pt',
                  latex_mode='equation*'):
    """
    Initializes pretty-printer depending on the environment.

    Parameters
    ==========

    pretty_print: boolean
        If True, use pretty_print to stringify;
        if False, use sstrrepr to stringify.
    order: string or None
        There are a few different settings for this parameter:
        lex (default), which is lexographic order;
        grlex, which is graded lexographic order;
        grevlex, which is reversed graded lexographic order;
        old, which is used for compatibility reasons and for long expressions;
        None, which sets it to lex.
    use_unicode: boolean or None
        If True, use unicode characters;
        if False, do not use unicode characters.
    use_latex: string, boolean, or None
        If True, use default latex rendering in GUI interfaces (png and
        mathjax);
        if False, do not use latex rendering;
        if 'png', enable latex rendering with an external latex compiler,
        falling back to matplotlib if external compilation fails;
        if 'matplotlib', enable latex rendering with matplotlib;
        if 'mathjax', enable latex text generation, for example MathJax
        rendering in IPython notebook or text rendering in LaTeX documents
    wrap_line: boolean
        If True, lines will wrap at the end;
        if False, they will not wrap but continue as one line.
    num_columns: int or None
        If int, number of columns before wrapping is set to num_columns;
        if None, number of columns before wrapping is set to terminal width.
    no_global: boolean
        If True, the settings become system wide;
        if False, use just for this console/session.
    ip: An interactive console
        This can either be an instance of IPython,
        or a class that derives from code.InteractiveConsole.

    Examples
    ========
    >>> from sympy.interactive import init_printing
    >>> from sympy import Symbol, sqrt
    >>> from sympy.abc import x, y
    >>> sqrt(5)
    sqrt(5)
    >>> init_printing(pretty_print=True) # doctest: +SKIP
    >>> sqrt(5) # doctest: +SKIP
      ___
    \/ 5
    >>> theta = Symbol('theta') # doctest: +SKIP
    >>> init_printing(use_unicode=True) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    \u03b8
    >>> init_printing(use_unicode=False) # doctest: +SKIP
    >>> theta # doctest: +SKIP
    theta
    >>> init_printing(order='lex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grlex') # doctest: +SKIP
    >>> str(y + x + y**2 + x**2) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(order='grevlex') # doctest: +SKIP
    >>> str(y * x**2 + x * y**2) # doctest: +SKIP
    x**2*y + x*y**2
    >>> init_printing(order='old') # doctest: +SKIP
    >>> str(x**2 + y**2 + x + y) # doctest: +SKIP
    x**2 + x + y**2 + y
    >>> init_printing(num_columns=10) # doctest: +SKIP
    >>> x**2 + x + y**2 + y # doctest: +SKIP
    x + y +
    x**2 + y**2
    """
    import sys
    from sympy.printing.printer import Printer

    if pretty_print:
        from sympy.printing import pretty as stringify_func
    else:
        from sympy.printing import sstrrepr as stringify_func

    # Even if ip is not passed, double check that not in IPython shell
    if ip is None:
        try:
            ip = get_ipython()
        except NameError:
            pass

    if ip and pretty_print:
        try:
            import IPython
            # IPython 1.0 deprecates the frontend module, so we import directly
#.........这里部分代码省略.........