def nstr(x, n=6):
"""
Convert an ``mpf`` or ``mpc`` to a decimal string literal with *n*
significant digits. The small default value for *n* is chosen to
make this function useful for printing collections of numbers
(lists, matrices, etc).
If *x* is a list or tuple, :func:`nstr` is applied recursively
to each element. For unrecognized classes, :func:`nstr`
simply returns ``str(x)``.
The companion function :func:`nprint` prints the result
instead of returning it.
>>> from sympy.mpmath import *
>>> nstr([+pi, ldexp(1,-500)])
'[3.14159, 3.05494e-151]'
>>> nprint([+pi, ldexp(1,-500)])
[3.14159, 3.05494e-151]
"""
if isinstance(x, list):
return "[%s]" % (", ".join(nstr(c, n) for c in x))
if isinstance(x, tuple):
return "(%s)" % (", ".join(nstr(c, n) for c in x))
if isinstance(x, mpf):
return to_str(x._mpf_, n)
if isinstance(x, mpc):
return "(" + complex_to_str(x._mpc_[0], x._mpc_[1], n) + ")"
if isinstance(x, basestring):
return repr(x)
from matrices import matrix
if isinstance(x, matrix):
return x.__nstr__(n)
return str(x)
def nstr(x, n=6):
"""Convert an mpf or mpc to a decimal string literal with n significant
digits. The small default value for n is chosen to make this function
useful for printing collections of numbers.
If x is a list or tuple, the function is applied to each element.
For unrecognized classes, this simply returns str(x).
There is also a companion function nprint that prints the string
instead of returning it.
>>> nstr([+pi, ldexp(1,-500)])
'[3.14159, 3.05494e-151]'
>>> print([+pi, ldexp(1,-500)])
[3.14159, 3.05494e-151]
"""
if isinstance(x, list):
return "[%s]" % (", ".join(nstr(c, n) for c in x))
if isinstance(x, tuple):
return "(%s)" % (", ".join(nstr(c, n) for c in x))
if isinstance(x, mpf):
return to_str(x._mpf_, n)
if isinstance(x, mpc):
return "(" + complex_to_str(x._mpc_[0], x._mpc_[1], n) + ")"
if isinstance(x, basestring):
return repr(x)
from matrices import matrix
if isinstance(x, matrix):
return x.__nstr__(n)
return str(x)
def __str__(s):
return "(%s)" % complex_to_str(s.real._mpf_, s.imag._mpf_, mp.dps)
def __str__(s):
return "(%s)" % complex_to_str(s.real._mpf_, s.imag._mpf_, mp.dps)