Python how to make simple animated loading while process is running

Question

This is pretty much what I have right now:

import time
import sys

done = \'false\'
#here is the animation
def animate():
    while done == \'false\':
               


        

Answer 1

I see this is a threading problem and not just an animated loading problem. Most the answers provided in this QA thread provides only a pseudocode and left the reader on their own.

Here is an answer I am trying to give using a working example of threading and animated loading.

The reader may modify in accordance to their needs.

# import python packages

import sys, time, threading

# Define your process.

 # Here is an example of the process function:

def the_process_function():
    n = 20
    for i in range(n):
        time.sleep(1)
        sys.stdout.write('\r'+'loading...  process '+str(i)+'/'+str(n)+' '+ '{:.2f}'.format(i/n*100)+'%')
        sys.stdout.flush()
    sys.stdout.write('\r'+'loading... finished               \n')

# Define your animated characters function:

def animated_loading():
    chars = "/—\|" 
    for char in chars:
        sys.stdout.write('\r'+'loading...'+char)
        time.sleep(.1)
        sys.stdout.flush() 

# define name dan target of your thread

the_process = threading.Thread(name='process', target=the_process_function)

# start the thread

the_process.start()

# while the process is alive, call the animated_loading() function

while the_process.isAlive():
    animated_loading()

The main steps are outlined in the commented out line.

Answer 2

Use a thread:

import itertools
import threading
import time
import sys

done = False
#here is the animation
def animate():
    for c in itertools.cycle(['|', '/', '-', '\\']):
        if done:
            break
        sys.stdout.write('\rloading ' + c)
        sys.stdout.flush()
        time.sleep(0.1)
    sys.stdout.write('\rDone!     ')

t = threading.Thread(target=animate)
t.start()

#long process here
time.sleep(10)
done = True

I also made a couple of minor modifications to your animate() function, the only really important one was adding sys.stdout.flush() after the sys.stdout.write() calls.

Answer 3

Here is my code:

print("Loading:")

#animation = ["10%", "20%", "30%", "40%", "50%", "60%", "70%", "80%", "90%", "100%"]
animation = ["[■□□□□□□□□□]","[■■□□□□□□□□]", "[■■■□□□□□□□]", "[■■■■□□□□□□]", "[■■■■■□□□□□]", "[■■■■■■□□□□]", "[■■■■■■■□□□]", "[■■■■■■■■□□]", "[■■■■■■■■■□]", "[■■■■■■■■■■]"]

for i in range(len(animation)):
    time.sleep(0.2)
    sys.stdout.write("\r" + animation[i % len(animation)])
    sys.stdout.flush()

print("\n")

Answer 4

Its all done with a few lines of code:

import time
import os

anime = ["|", "/", "-", "\\"]

done = False

while done == False:
    for i in anime:
        print('Please wait while system is Loading...', i)
        os.system('clear')
        time.sleep(0.1)

Tested and working successfully in the terminal.

Answer 5

Try this one

import time
import sys


animation = "|/-\\"

for i in range(100):
    time.sleep(0.1)
    sys.stdout.write("\r" + animation[i % len(animation)])
    sys.stdout.flush()
    #do something
print("End!")

Answer 6

import sys, time, threading

def your_function_name() :
    # do something here

def loadingAnimation(process) :
    while process.isAlive() :
        chars = "/—\|" 
        for char in chars:
            sys.stdout.write('\r'+'loading '+char)
            time.sleep(.1)
            sys.stdout.flush()

loading_process = threading.Thread(target=your_function_name)
loading_process.start()
animated_loading(loading_process)
loading_process.join()