Python Looping for Store Data

Question

I want to ask about looping. This my Code I'm using Python. Please Help me to get the looping.

temp = 0 # temperature
valve = 0 #control temperature

while True :
  if temp = 30
    valve =+ 20
    print "temp now 30 and valve 20"
  elif temp = 40
    valve =+ 40
    print "temp now 40 and valve 40"
  else
    print "temp n and valve n"

time.sleep(5) #looping 5 second not happen i get error

Your question is unclear, please state the inputs, desired outputs and post your errors — EdChum, Dec 09 '15 at 16:01
with `if` you probably want to check equality (`==`), not assignment (`=`). `if temp == 30:`. You're also missing `:` at then end of your conditional lines. Does this code even run? — Jon Surrell, Dec 09 '15 at 16:08
yes code is run. Thank You @JonSurrell. I Have one question again. how do looping in a python program but if a variable that has been repeated need not be repeated ? — Ridho Habi Putra, Dec 09 '15 at 16:13
Is it doing anything like what you expect? Shouldn't `time.sleep(5)` be inside the `while` block? Shouldn't `=+` be `+=`? — Jon Surrell, Dec 09 '15 at 16:15

score 1 · Accepted Answer · answered Dec 09 '15 at 16:23

Based on your posted code and assuming you are trying to loop indefinitely with a period of 5s and increase the valve value depending on temperature, this code runs:

import time

temp = 0 # temperature
valve = 0 #control temperature

while True:
    if temp == 30:
        valve += 20
    elif temp == 40:
        valve += 40
    else:
        valve = 'n' 
        temp = 'n'

    print "temp now {temp} and valve {valve}".format(temp=temp, valve=valve)
    time.sleep(5) #looping 5 second not happen i get error

Mistakes I could spot:

No import of time (import time)
Conditional statements in python are followed by :
You were using = to check for equality, while the correct syntax is ==
Python uses indentation to keep track of code blocks, so time.sleep(5) should be also aligned with the if statements, so that it is part of the while loop
(not an error), but an improvement: you can set your valve values in the conditional part of your loop and only print once at the end

thank you for youre answer. I want asked again, how do looping in a python program but if a variable that has been repeated need not be repeated ? such as break and continue . @Damian — Ridho Habi Putra, Dec 09 '15 at 16:32
I don't really understand your question. Is it that you want to loop over the unique values of a list? — Damian, Dec 09 '15 at 16:42
If that's the case (looping over the unique values of a list) - just use set(list). So, you will have something like: for iterator in set(duplicate_list): # do something — Damian, Dec 09 '15 at 16:57

Python Looping for Store Data

1 Answers1