def vpprint(expr, **settings):
r"""Function for pretty printing of expressions generated in the
sympy.physics vector package.
Mainly used for expressions not inside a vector; the output of running
scripts and generating equations of motion. Takes the same options as
SymPy's pretty_print(); see that function for more information.
Parameters
==========
expr : valid sympy object
SymPy expression to pretty print
settings : args
Same as pretty print
Examples
========
Use in the same way as pprint
"""
mp = VectorPrettyPrinter(settings)
print(mp.doprint(expr))
def vpprint(expr, **settings):
r"""Function for pretty printing of expressions generated in the
sympy.physics vector package.
Mainly used for expressions not inside a vector; the output of running
scripts and generating equations of motion. Takes the same options as
SymPy's pretty_print(); see that function for more information.
Parameters
==========
expr : valid sympy object
SymPy expression to pretty print
settings : args
Same as pretty print
Examples
========
Use in the same way as pprint
"""
mp = VectorPrettyPrinter(settings)
print(mp.doprint(expr))
def render(self, *args, **kwargs):
self = e
ar = self.args # just to shorten things
if len(ar) == 0:
return unicode(0)
ol = [] # output list, to be concatenated to a string
for i, v in enumerate(ar):
for j in 0, 1, 2:
# if the coef of the basis vector is 1, we skip the 1
if ar[i][0][j] == 1:
ol.append(u(" + ") + ar[i][1].pretty_vecs[j])
# if the coef of the basis vector is -1, we skip the 1
elif ar[i][0][j] == -1:
ol.append(u(" - ") + ar[i][1].pretty_vecs[j])
elif ar[i][0][j] != 0:
# If the basis vector coeff is not 1 or -1,
# we might wrap it in parentheses, for readability.
arg_str = (VectorPrettyPrinter().doprint(
ar[i][0][j]))
if isinstance(ar[i][0][j], Add):
arg_str = u("(%s)") % arg_str
if arg_str[0] == u("-"):
arg_str = arg_str[1:]
str_start = u(" - ")
else:
str_start = u(" + ")
ol.append(str_start + arg_str + '*' +
ar[i][1].pretty_vecs[j])
outstr = u("").join(ol)
if outstr.startswith(u(" + ")):
outstr = outstr[3:]
elif outstr.startswith(" "):
outstr = outstr[1:]
return outstr
def test_vector_pretty_print():
# TODO : The unit vectors should print with subscripts but they just
# print as `n_x` instead of making `x` a subscritp with unicode.
# TODO : The pretty print division does not print correctly here:
# w = alpha * N.x + sin(omega) * N.y + alpha / beta * N.z
pp = VectorPrettyPrinter()
expected = u(' 2\na n_x + b n_y + c\u22c5sin(\u03b1) n_z')
assert expected == pp.doprint(v)
assert expected == v._pretty().render()
expected = u('\u03b1 n_x + sin(\u03c9) n_y + \u03b1\u22c5\u03b2 n_z')
assert expected == pp.doprint(w)
assert expected == w._pretty().render()
def test_vector_pretty_print():
# TODO : The unit vectors should print with subscripts but they just
# print as `n_x` instead of making `x` a subscript with unicode.
# TODO : The pretty print division does not print correctly here:
# w = alpha * N.x + sin(omega) * N.y + alpha / beta * N.z
pp = VectorPrettyPrinter()
expected = u("""\
2
a n_x + b n_y + c⋅sin(α) n_z\
""")
assert expected == pp.doprint(v)
assert expected == v._pretty().render()
expected = u('α n_x + sin(ω) n_y + α⋅β n_z')
assert expected == pp.doprint(w)
assert expected == w._pretty().render()
def test_vector_pretty_print():
# TODO : The unit vectors should print with subscripts but they just
# print as `n_x` instead of making `x` a subscript with unicode.
# TODO : The pretty print division does not print correctly here:
# w = alpha * N.x + sin(omega) * N.y + alpha / beta * N.z
pp = VectorPrettyPrinter()
expected = u("""\
2
a n_x + b n_y + c⋅sin(α) n_z\
""")
assert expected == pp.doprint(v)
assert expected == v._pretty().render()
expected = u('α n_x + sin(ω) n_y + α⋅β n_z')
assert expected == pp.doprint(w)
assert expected == w._pretty().render()
def test_vector_pretty_print():
# TODO : The unit vectors should print with subscripts but they just
# print as `n_x` instead of making `x` a subscritp with unicode.
# TODO : The pretty print division does not print correctly here:
# w = alpha * N.x + sin(omega) * N.y + alpha / beta * N.z
pp = VectorPrettyPrinter()
expected = (u' 2\na \x1b[94m\x1b[1mn_x\x1b[0;0m\x1b[0;0m + b \x1b[94m'
u'\x1b[1mn_y\x1b[0;0m\x1b[0;0m + c\u22c5sin(\u03b1) \x1b[9'
u'4m\x1b[1mn_z\x1b[0;0m\x1b[0;0m')
assert expected == pp.doprint(v)
assert expected == v._pretty().render()
expected = (u'\u03b1 \x1b[94m\x1b[1mn_x\x1b[0;0m\x1b[0;0m + sin(\u03c9'
u') \x1b[94m\x1b[1mn_y\x1b[0;0m\x1b[0;0m + \u03b1\u22c5'
u'\u03b2 \x1b[94m\x1b[1mn_z\x1b[0;0m\x1b[0;0m')
assert expected == pp.doprint(w)
assert expected == w._pretty().render()
def test_vector_pretty_print():
# TODO : The unit vectors should print with subscripts but they just
# print as `n_x` instead of making `x` a subscritp with unicode.
# TODO : The pretty print division does not print correctly here:
# w = alpha * N.x + sin(omega) * N.y + alpha / beta * N.z
pp = VectorPrettyPrinter()
expected = u(' 2\na \x1b[94m\x1b[1mn_x\x1b[0;0m\x1b[0;0m + b \x1b[94m'
'\x1b[1mn_y\x1b[0;0m\x1b[0;0m + c\u22c5sin(\u03b1) \x1b[9'
'4m\x1b[1mn_z\x1b[0;0m\x1b[0;0m')
assert expected == pp.doprint(v)
assert expected == v._pretty().render()
expected = u('\u03b1 \x1b[94m\x1b[1mn_x\x1b[0;0m\x1b[0;0m + sin(\u03c9'
') \x1b[94m\x1b[1mn_y\x1b[0;0m\x1b[0;0m + \u03b1\u22c5'
'\u03b2 \x1b[94m\x1b[1mn_z\x1b[0;0m\x1b[0;0m')
assert expected == pp.doprint(w)
assert expected == w._pretty().render()
def render(self, *args, **kwargs):
ar = e.args # just to shorten things
if len(ar) == 0:
return unicode(0)
settings = printer._settings if printer else {}
vp = printer if printer else VectorPrettyPrinter(settings)
pforms = [] # output list, to be concatenated to a string
for i, v in enumerate(ar):
for j in 0, 1, 2:
# if the coef of the basis vector is 1, we skip the 1
if ar[i][0][j] == 1:
pform = vp._print(ar[i][1].pretty_vecs[j])
# if the coef of the basis vector is -1, we skip the 1
elif ar[i][0][j] == -1:
pform = vp._print(ar[i][1].pretty_vecs[j])
pform = prettyForm(*pform.left(" - "))
bin = prettyForm.NEG
pform = prettyForm(binding=bin, *pform)
elif ar[i][0][j] != 0:
# If the basis vector coeff is not 1 or -1,
# we might wrap it in parentheses, for readability.
pform = vp._print(ar[i][0][j])
if isinstance(ar[i][0][j], Add):
tmp = pform.parens()
pform = prettyForm(tmp[0], tmp[1])
pform = prettyForm(
*pform.right(" ", ar[i][1].pretty_vecs[j]))
else:
continue
pforms.append(pform)
pform = prettyForm.__add__(*pforms)
kwargs["wrap_line"] = kwargs.get("wrap_line")
kwargs["num_columns"] = kwargs.get("num_columns")
out_str = pform.render(*args, **kwargs)
mlines = [line.rstrip() for line in out_str.split("\n")]
return "\n".join(mlines)
def render(self, *args, **kwargs):
ar = e.args # just to shorten things
if len(ar) == 0:
return unicode(0)
settings = printer._settings if printer else {}
vp = printer if printer else VectorPrettyPrinter(settings)
ol = [] # output list, to be concatenated to a string
for i, v in enumerate(ar):
for j in 0, 1, 2:
# if the coef of the basis vector is 1, we skip the 1
if ar[i][0][j] == 1:
ol.append(u" + " + ar[i][1].pretty_vecs[j])
# if the coef of the basis vector is -1, we skip the 1
elif ar[i][0][j] == -1:
ol.append(u" - " + ar[i][1].pretty_vecs[j])
elif ar[i][0][j] != 0:
# If the basis vector coeff is not 1 or -1,
# we might wrap it in parentheses, for readability.
if isinstance(ar[i][0][j], Add):
arg_str = vp._print(ar[i][0][j]).parens()[0]
else:
arg_str = (vp.doprint(ar[i][0][j]))
if arg_str[0] == u"-":
arg_str = arg_str[1:]
str_start = u" - "
else:
str_start = u" + "
ol.append(str_start + arg_str + ' ' +
ar[i][1].pretty_vecs[j])
outstr = u"".join(ol)
if outstr.startswith(u" + "):
outstr = outstr[3:]
elif outstr.startswith(" "):
outstr = outstr[1:]
return outstr