Difference between results (Python and Dictionaries)

Developers
1

Hi there,

I’m experiencing some troubles with dictionaries in python (i read that in dynamo there are some limitations to work with them in python) but I’m not sending a dictionary into the OUTPUT, so I think there is no error here.

The issue is that I developed the code in an online interpreter (https://repl.it/MB3v/14), and I’m getting this result for AUX:

image

but if I take the same code into a python node, i get this:

image
image.png627×657 18.8 KB

This is the code:

lineas = []
lineas.append(['c'  , 0   , 470 ,0])
lineas.append(['c'  , 255 , 410 ,70])
lineas.append(['c'  , 135   , 255 ,160])
lineas.append(['c'  , 410 , 470 ,160])
lineas.append(['c'  , 0 , 135 ,300])

# Lineas cargadas 
# Diccionario con la cantidad de segmentos por z
segmentosPiso = {}
for x in range(0,len(lineas)):
    segmentosPisoObjetoLocal = {}
    if lineas[x][3] in segmentosPiso.keys():
      segmentosPiso[lineas[x][3]] = segmentosPiso[lineas[x][3]] + 1
    else:
      segmentosPiso[lineas[x][3]] = 1


lineasCargadas = {}
contador = 0
iCoun = 0
AUX = []
for k,v in segmentosPiso.items():
    lineasADibujar = []
    if ((contador > 0) and (contador < len(segmentosPiso) - 1)):
        # print (k,v)
        ind = []
        for lline in range(0,len(lineas)):
          if (k == lineas[lline][3]):
            ind.append(lline)
        for c in ind:
            lineasCargadas[iCoun] = (c)
            iCoun +=1
        # print(lineasCargadas)
        for xline in range(1,len(lineas)):
          bFlag = False
          for xCar , xVal in  lineasCargadas.items():
            if((lineas[xline][1] == lineas[xVal][1]) and (lineas[xline][2] == lineas[xVal][2])):
              bFlag = True
          if bFlag == False:
            lineasADibujar.append(xline)
        AUX.append(lineasADibujar)
        # print(lineasADibujar)    
    #bflag = False
    contador += 1

I really don’t get where is the error or what am I missing here.

Thanks in advance!

2

Finnally we came with a solution:

lineas = {}
lineas[0] = ['c'  , 0   , 470 ,0]
lineas[1] = ['c'  , 255 , 410 ,70]
lineas[2] = ['c'  , 135 , 255 ,160]
lineas[3] = ['c'  , 410 , 470 ,160]
lineas[4] = ['c'  , 0   , 135 ,300]

# Lineas cargadas
# Diccionario con la cantidad de segmentos por z
lineas = PaqueteLimites
segmentosPiso = {}
for x in range(0,len(lineas)):
    segmentosPisoObjetoLocal = {}
    if lineas[x][3] in segmentosPiso.keys():
      segmentosPiso[lineas[x][3]] = segmentosPiso[lineas[x][3]] + 1
    else:
      segmentosPiso[lineas[x][3]] = 1

segPiso = []
for k,v in segmentosPiso.items():
    segPiso.append([k,v])

lineasCargadas = []
contador = 0
aux = []
for info in range(0,len(segPiso)):
    if ((contador > 0) and (contador < len(segmentosPiso) - 1)):
        lineasADibujar = []
        ind = []
        for lline in range(0,len(lineas)):
          if (segPiso[info][0] == lineas[lline][3]):
            ind.append(lline)
        for indiceCargado in ind:
            lineasCargadas.append(indiceCargado)
        for xline in range(1,len(lineas)):
          bFlag = False
          for  xVal in  range(0,len(lineasCargadas)):
            if((lineas[xline][1] == lineas[lineasCargadas[xVal]][1]) and (lineas[xline][2] == lineas[lineasCargadas[xVal]][2])):
              bFlag = True
          if bFlag == False:
            lineasADibujar.append(xline)
        aux.append(lineasADibujar)
    contador += 1

We changed dictionaries into lists and still got the same result. Then, we realized that segPiso wasn’t in the order wanted, so we added segPiso = sorted(segPiso) after it’s definition, and the problem was solved.

lineas = {}
lineas[0] = ['c'  , 0   , 470 ,0]
lineas[1] = ['c'  , 255 , 410 ,70]
lineas[2] = ['c'  , 135 , 255 ,160]
lineas[3] = ['c'  , 410 , 470 ,160]
lineas[4] = ['c'  , 0   , 135 ,300]

segPiso = []
for k,v in segmentosPiso.items():
segPiso.append([k,v])
segPiso = sorted(segPiso)

lineasCargadas = []
contador = 0
IndicesCurvas = []
for info in range(0,len(segPiso)):
if ((contador > 0) and (contador < len(segmentosPiso) - 1)):
    lineasADibujar = []
    ind = []
    for lline in range(0,len(lineas)):
      if (segPiso[info][0] == lineas[lline][3]):
        ind.append(lline)
    for indiceCargado in ind:
        lineasCargadas.append(indiceCargado)
    for xline in range(1,len(lineas)):
      bFlag = False
      for  xVal in  range(0,len(lineasCargadas)):
        if((lineas[xline][1] == lineas[lineasCargadas[xVal]][1]) and (lineas[xline][2] == lineas[lineasCargadas[xVal]][2])):
          bFlag = True
      if bFlag == False:
        lineasADibujar.append(xline)
    IndicesCurvas.append(lineasADibujar)
contador += 1

But still, don’t really know why the problem of the order or the dictionary not working. Any suggestions?

Thanks!

3

Python dictionary are unordered data types.
For a dictionary that keeps items ordered you need the OrderedDict from the collections module.

1 Like
4

Thanks @Gui_Talarico. I’ll keep this in mind!