Printing (Docstrings)

mechanics_printing

sympy.physics.mechanics.functions.mechanics_printing()[source]

Sets up interactive printing for mechanics’ derivatives.

The main benefit of this is for printing of time derivatives; instead of displaying as Derivative(f(t),t), it will display f’ This is only actually needed for when derivatives are present and are not in a physics.mechanics object.

Examples

>>> # 2 lines below are for tests to function properly
>>> import sys
>>> sys.displayhook = sys.__displayhook__
>>> from sympy import Function, Symbol, diff
>>> from sympy.physics.mechanics import mechanics_printing
>>> f = Function('f')
>>> t = Symbol('t')
>>> x = Symbol('x')
>>> diff(f(t), t)
Derivative(f(t), t)
>>> mechanics_printing()
>>> diff(f(t), t)
f'
>>> diff(f(x), x)
Derivative(f(x), x)
>>> # 2 lines below are for tests to function properly
>>> import sys
>>> sys.displayhook = sys.__displayhook__

mprint

sympy.physics.mechanics.functions.mprint(expr, **settings)[source]

Function for printing of expressions generated in mechanics.

Extends SymPy’s StrPrinter; mprint is equivalent to: print sstr() mprint takes the same options as sstr.

Parameters :

expr : valid sympy object

SymPy expression to print

settings : args

Same as print for SymPy

Examples

>>> from sympy.physics.mechanics import mprint, dynamicsymbols
>>> u1 = dynamicsymbols('u1')
>>> print(u1)
u1(t)
>>> mprint(u1)
u1

mpprint

sympy.physics.mechanics.functions.mpprint(expr, **settings)[source]

Function for pretty printing of expressions generated in mechanics.

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

mlatex

sympy.physics.mechanics.functions.mlatex(expr, **settings)[source]

Function for printing latex representation of mechanics objects.

For latex representation of Vectors, Dyadics, and dynamicsymbols. Takes the same options as SymPy’s latex(); see that function for more information;

Parameters :

expr : valid sympy object

SymPy expression to represent in LaTeX form

settings : args

Same as latex()

Examples

>>> from sympy.physics.mechanics import mlatex, ReferenceFrame, dynamicsymbols
>>> N = ReferenceFrame('N')
>>> q1, q2 = dynamicsymbols('q1 q2')
>>> q1d, q2d = dynamicsymbols('q1 q2', 1)
>>> q1dd, q2dd = dynamicsymbols('q1 q2', 2)
>>> mlatex(N.x + N.y)
'\\mathbf{\\hat{n}_x} + \\mathbf{\\hat{n}_y}'
>>> mlatex(q1 + q2)
'q_{1} + q_{2}'
>>> mlatex(q1d)
'\\dot{q}_{1}'
>>> mlatex(q1 * q2d)
'q_{1} \\dot{q}_{2}'
>>> mlatex(q1dd * q1 / q1d)
'\\frac{q_{1} \\ddot{q}_{1}}{\\dot{q}_{1}}'

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