Conditional evaluation of several lists in Python

[franciscusm]

Hi,

How can several lists be evaluated in Python?

For instance this works for one list:

dataEnteringNode = IN[0]
c=[]

for i in IN[0]:
if i == “aaa”: c.append(“is aaa”)
elif i == “bbb”: c.append(“is bbb”)
elif i == “ccc”: c.append(“is ccc”)
else: c.append(“is none”)
OUT = c

But if I want to enter several lists in the Python code and compare elements from several lists, something like:

dataEnteringNode0 = IN[0]
dataEnteringNode1 = IN[1]
dataEnteringNode2 = IN[2]
c=[]

for i in IN[0] and j in IN[1]:

_ if i == “aaa” and j ==“aaa”: c.append(“is aaa”)_
_ elif i == “bbb” and j !=“ccc”: c.append(“is bbb”)_
_ elif i == “ccc”: c.append(“is ccc”)_
_ else: c.append(“is none”)_

OUT = c

Please, can anybody clarify?

Thanks

[Yna_Db]

This could help:

How to write simple "if elif else" conditional in Python

Some further knowledge for you is that you could do the following to your code so it can adapt without modification to a increased amount of checks in the future(code and image show below). Code: #modified by Brendan Cassidy styles=[] #loop for main input list for i in IN[0]: temp_list=[] #loop for the comparison for b in IN[1]: if i == b[0]: temp_list=b[1] #Checks if list is empty if yes adds 0.00mm to element if temp_list: styles.append(temp_list) else : styles.append(…

[franciscusm]

Not exactly what I’m asking but thanks, it’s good to know.

[Fiesta]

just look at the zip function. You can zip also more than 2 lists, but they need to have the same lengh

looks like that

a =in[0]
b =in[1]

for h,g in zip(a,b)
do something()

or one “for loop” in another

for a in lista:
___…
___for b in listb
______…

[viktor_kuzev]

@Fiesta
You beat me to it
Anyway here’s an exaple:

[franciscusm]

Wow, that’s great! Thanks both