def blockToStr(block, string):
if not (Expression.IsBlock(block)
) and not type(block) == Expression.Expression:
return string + str(block)
if type(block) == Expression.PowerBlock:
pars = type(
block.expressions[1]
) == Expression.ExpressionBlock #Expression.IsBlock(block.expressions[1]) # wenn der nenner ein block ist, klammern setzen
if pars:
return blockToStr(block.expressions[0],
string) + "^(" + blockToStr(
block.expressions[1], "") + ")"
else:
return blockToStr(block.expressions[0], string) + "^" + blockToStr(
block.expressions[1], "")
elif type(block) == Expression.QuotientBlock:
pars = type(
block.expressions[1]
) == Expression.ExpressionBlock #Expression.IsBlock(block.expressions[1]) # wenn der nenner ein block ist, klammern setzen
if pars:
return blockToStr(block.expressions[0],
string) + "/(" + blockToStr(
block.expressions[1], "") + ")"
else:
return blockToStr(block.expressions[0], string) + "/" + blockToStr(
block.expressions[1], "")
for el in block.expressions:
if Expression.IsBlock(el):
string += "("
string = blockToStr(el, string)
string += ")"
else:
string += str(el)
return string
def printBlock(block, indents):
for el in block.expressions:
if Expression.IsBlock(el):
#print(type(el))
printBlock(el,indents+2)
continue
print(indents*'-'+str(el))
def PackFunctions(expression):
'''
Wandelt Teile der Art <FunctionElement> <ExpressionBlock> in einen FunctionBlock um
'''
new_expressions = []
i = 0
while i < len(expression.expressions):
#for el in expression.expressions:
el = expression.expressions[i]
#if type(el) == Expression.ExpressionBlock:
if Expression.IsBlock(el):
block = (type(el))()
block.expressions = PackFunctions(el)
new_expressions.append(block)
elif type(el) == Expression.FunctionElement:
new_block = Expression.FunctionBlock()
new_block.append(el)
if (i == len(expression.expressions) - 1):
raise Exception("KEIN FUNC ARGUMENT")
new_block.append(expression.expressions[i + 1])
new_expressions.append(new_block)
i += 1
else:
new_expressions.append(el)
i += 1
return new_expressions
def AddMultiplyOperators(expression):
i = 0
new_expressions = []
while i < len(expression.expressions):
el = expression.expressions[i]
if not isinstance(el, Expression.OperatorElement) and (
type(expression) == Expression.ExpressionBlock
or type(expression) == Expression.Expression):
before = None
if (i != 0):
before = new_expressions[len(new_expressions) - 1]
if before != None:
if not isinstance(
before, Expression.OperatorElement) and not isinstance(
before, Expression.FunctionElement):
new_expressions.append(Expression.multiplyOperator)
if (Expression.IsBlock(el)):
block = (type(el))()
block.expressions = AddMultiplyOperators(el)
new_expressions.append(block)
else:
new_expressions.append(el)
if not isinstance(el, Expression.OperatorElement) and (
type(expression) == Expression.ExpressionBlock
or type(expression) == Expression.Expression):
after = None
if (i < len(expression.expressions) - 1):
after = expression.expressions[i + 1]
if after != None:
if not isinstance(
after, Expression.OperatorElement) and not isinstance(
el, Expression.FunctionElement):
new_expressions.append(Expression.multiplyOperator)
i += 1
return new_expressions
def PackQuotientBlocks(expression):
i = 0
new_expressions = []
while i < len(expression.expressions):
el = expression.expressions[i]
if Expression.IsBlock(el):
block = (type(el))()
block.expressions = PackQuotientBlocks(el)
new_expressions.append(block)
elif el == Expression.divideOperator:
if (i == 0):
raise Exception("Error: No numerator before divide operator")
elif (i == len(expression.expressions) - 1):
raise Exception("Error: No denominator after divide operator")
quotientBlock = Expression.QuotientBlock()
# before_el = expression.expressions[i-1]
before_el = new_expressions[len(new_expressions) - 1]
after_el = expression.expressions[i + 1]
denom = Expression.ExpressionBlock(after_el)
if isinstance(after_el, Expression.OperatorElement):
denom = Expression.ExpressionBlock(
after_el, expression.expressions[i + 2])
i += 1
new_expressions.pop(len(new_expressions) - 1)
quotientBlock.append(before_el)
quotientBlock.append(denom)
new_expressions.append(quotientBlock)
i += 1
else:
new_expressions.append(el)
i += 1
return new_expressions
def PackPowerBlocks(expression):
new_expressions = []
i = 0
while i < len(expression.expressions):
el = expression.expressions[i]
if Expression.IsBlock(el):
block = (type(el))()
block.expressions = PackPowerBlocks(el)
new_expressions.append(block)
elif el == Expression.powerOperator:
if (i == 0):
raise Exception("Error: No base before power operator")
elif (i == len(expression.expressions) - 1):
raise Exception("Error: No exponent after power operator")
powerBlock = Expression.PowerBlock()
# before_el = expression.expressions[i-1]
before_el = new_expressions[len(new_expressions) - 1]
after_el = expression.expressions[i + 1]
exp = after_el
if isinstance(after_el, Expression.OperatorElement):
exp = Expression.ExpressionBlock(after_el,
expression.expressions[i + 2])
i += 1
new_expressions.pop(len(new_expressions) - 1)
powerBlock.append(before_el)
powerBlock.append(exp)
new_expressions.append(powerBlock)
i += 1
else:
new_expressions.append(el)
i += 1
return new_expressions
