How to call different functions in loop Python

Question

It's about Rasberry PI, but in this case, it doesn't matter. I have 9 functions like:

for_1..9()

These functions turn on one part of a 4-digit LED display. But I want to use a button for every number on this display, so I want to call different functions every time when I push the button. No idea how can it be.

Functions look like this:

def for_1():
    GPIO.output(15.HIGH)
    GPIO.output(18.HIGH)
    ....

Smth like this:

if Pin.input(number of pin):
    for i in range(0, 9):
        for_1()
        #next time in loop has to be next function

Whenever you think you need lots of variables named foo_1,..., foo_1000, there's 98% chance you actually need a list of variables. — ForceBru
– ForceBru, Commented Dec 25, 2017 at 8:09

n8sty · Accepted Answer · 2017-12-25 08:10:47Z

4

You can put functions in iterables like so

def f():
    return 1

def g():
    return 2

for fn in [f, g]:
    print(fn())
# 1
# 2

Just put your required functions in a container that can be iterated over and then call them.

answered Dec 25, 2017 at 8:10

n8sty

1,4571 gold badge14 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sohaib Farooqi · Accepted Answer · 2017-12-25 08:11:24Z

2

You can use a dynamic way to call each function for different iteration cycle.

Define all your functions i.e. from for_1 ... for_9,
import the file which defines these functions into your main script
Use python's getattr to get the function and finally invoke it.

The following code assumes that functions and iteration logic is in the same module. However you can define your functions in a separate file and import them in your iteration logic script.

import sys

thismodule = sys.modules[__name__] #This fetches the current module refrence

def for_1():
   return 1

for i in range(1, 10):
    func = getattr(thismodule, "for_{}".format(i))
    func() #This will invoke for_1 ... for_9

answered Dec 25, 2017 at 8:11

Sohaib Farooqi

5,6944 gold badges34 silver badges47 bronze badges

1 Comment

user9088429 Over a year ago

Thank you so much)

Sahil Dahiya · Accepted Answer · 2017-12-30 01:43:57Z

0

try this:

if Pin.input(number of pin):
    for i in range(0, 9):
        globals()['for_'+str(i)]()

or

if Pin.input(number of pin):
    for i in range(0, 9):
        locals()['for_'+str(i)]()

edited Dec 30, 2017 at 1:43

answered Dec 25, 2017 at 8:14

Sahil Dahiya

7211 gold badge5 silver badges12 bronze badges

Collectives™ on Stack Overflow

How to call different functions in loop Python

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related