def _assign(self, math):
q = re_math.assignment.match(math)
name, value = q.group(1), q.group(2)
name = name.replace(' ', '')
if '(' in name:
fn = name[:name.index('(')]
if not re_math.variable_name.match(fn): raise ValueError('Invalid name')
params = util.get_inner(name[name.index('('):])[0]
self._['functions'][fn] = {
'call': lambda *args : self.compute(util.replace_list(params.split(','), args, value), True),
'math': math
}
result = self._['functions'][fn]['call']
else:
if not re_math.variable_name.match(name): raise ValueError('Invalid name')
result = self.compute(value);
self._['variables'][name] = str(result) if type(result) not in (type(np.array([])), type(np.matrix([]))) else str(result.tolist())
return result
def compute(self, math, to_string=False):
math = math.lstrip()
for q in re_math.parenthesis.finditer(math):
inner = util.get_inner(math[q.start():])[0]
math = math.replace('(' + inner + ')', self.compute(inner, True))
query = math.split(' ')
if query[0] in self._['commands']:
return self._['commands'][query[0]]['call'](*query[1:])
if ':=' in math:
return self._assign(math)
if '=' in math and not re_math.equal_sign.search(math):
lhs, rhs = math.replace(' ', '').split('=')
return self.compute('solve ' + lhs + '-' + rhs)
for fn in self._['tex']:
while fn in math:
tex = util.parse_tex( math[math.index(fn):] )
math = math.replace(tex['string'], str(self._['tex'][fn]['call'](tex)))
for fn in self._['functions']:
while fn in math:
inner = util.get_inner(math[len(fn)+math.index(fn):])[0]
value = self._['functions'][fn]['call']( *self.compute('[' + inner + ']').tolist() )
math = math.replace(fn + '(' + inner + ')', value)
for q in re_math.variables(self._['variables']).finditer(math):
math = math.replace(q.group(0), self._['variables'][q.group(0)])
math = re_math.matrix_prod.sub(']\cdot[', math)
for q in re_math.operator.finditer(math):
if q.group('command') in self._['operators']:
value = self._['operators'][q.group('command')]['call'](self.compute(q.group(1)), self.compute(q.group(3)))
result = str(value) if type(value) is not type(np.array([])) else str(value.tolist())
math = math.replace(q.group(0), result)
else:
raise ValueError('Unknown Operator: ' + q.group('command'))
for q in re_math.factorial.finditer(math):
math = math.replace(q.group(0), str(self.compute( '\prod_{1}^{' + q.group(1) + '}{x}' )))
for q in re_math.array_index.finditer(math):
math = math.replace(q.group(0), str( util.get_coordinate(self.compute(q.group(1)).tolist(), q.group(2).split(',')) ))
math = re_math.in_brackets.sub(r'(\1)', math)
math = math.replace('^', '**')
if self.debug:
print(' '.join(query) + ' = ' + math + '\n')
if re_math.is_valid.search(math):
for q in re_math.imaginary_number.finditer(math):
math = math.replace(q.group(0), q.group(1) + '*j')
math = re_math.matrix_pow.sub(r'linalg.matrix_power(\1, int(\2))', math)
math = re_math.number.sub(r'np.float_(\1)', math)
math = re_math.imaginary_unit.sub('1j', math)
while '[' in math:
inner = util.get_inner(math[math.index('['):], '[', ']')[0]
math = math.replace('[' + inner + ']', 'np.array(L' + inner + 'R)' )
math = math.replace('L', '[').replace('R', ']')
result = eval(math)
if to_string:
return str(result) if type(result) is not type(np.array([])) else str(result.tolist())
return result
elif math is '':
return ''
else:
raise ValueError('Invalid Tex')
