background_jupyter.py

from threading import Thread
from time import sleep

# Support for background execution
alive_flag = True
def alive_msg_task ():
    while alive_flag:
        sleep ( 30 )
        print ( "Still working, please wait...", end = " ", flush = True )
    print ( "\nDownload completed" )

def download_task ( taxId, db ):
    print ( "Building all-traits table, please wait...", end = " ", flush = True )    
    alive_flag = True
    get_database_csv ( taxId, db )
    alive_flag = False


# create dataframe for Tax IDs and their names
dframe_taxID = df_taxID()

print("Do you want to choose all the species or only one?")
        
@interact_manual
def all_one(All_One = ['All', 'One']):
    
    if All_One == 'All':
        for x, row in dframe_taxID.iterrows():
            taxID = row['Tax IDs'] # get taxID
            database = row['Database URL'] # get database url
            get_database_csv(taxID, database) # get csv download link
    
    else:
        print("\nChoose the species name from the list below.")
        
        @interact_manual
        def show_taxid(Species = dframe_taxID['Tax Names']):
            
            # get taxID and database url from the table
            taxID = dframe_taxID[dframe_taxID['Tax Names'] == Species]['Tax IDs'].item()
            database = dframe_taxID[dframe_taxID['Tax Names'] == Species]['Database URL'].item()

            print("Tax ID is: " + taxID)
                        
            # get csv download link
            download_thread = Thread ( target = download_task, name = "Downloader", args = [taxID, database] )
            download_thread.start ()            
            
            # "I'm still alive" messages while the long-time task runs
            alive_daemon = Thread ( daemon = True, target = alive_msg_task, name = "Alive Message Daemon" )
            alive_daemon.start ()