Index in Python list contains multiple elements.How to access each val and pass them

Index in Python list contains multiple elements.How to access each val and pass them - Printable Version

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Index in Python list contains multiple elements.How to access each val and pass them - Shameendra - Nov-30-2018

I have written a code in Python 3 that extracts values from a table(.csv) using pandas and appends them to a list. My code is:

import os
import numpy as np
import csv
import pandas as pd
from generate_xml import write_xml

# global constants
img = None
tl_list = []
br_list = []
object_list = []
tl_x = []
tl_y = []
br_x =[]
br_y =[]


# constants
obj = 'red_hat'

df = pd.read_csv('ring_1_05_sam.csv')
tl_x = df.iloc[5:10, 0:1] - 30
tl_y = df.iloc[5:10, 1:2] - 30
br_x = df.iloc[5:10, 0:1] + 30
br_y = df.iloc[5:10, 1:2] + 30
tl_x = (tl_x.to_string(index=False, header=False))
tl_y = (tl_y.to_string(index=False, header=False))
br_x = (br_x.to_string(index=False, header=False))
br_y = (br_y.to_string(index=False, header=False))
tl_list = (tl_x, tl_y)
br_list = (br_x, br_y)
object_list.append(obj)

print(tl_list[0])

This gives me an output of

Output:1507.50
1507.44
1507.09
1507.00

So as you can see, my index[0] at tl_list[] has these 4 elements. My question is how do i access them individually? To be more specific, I want to pass each value to a function, one at a time

import os
import numpy as np
import csv
import pandas as pd
from generate_xml import write_xml

# global constants
img = None
tl_list = []
br_list = []
object_list = []
tl_x = []
tl_y = []
br_x =[]
br_y =[]


# constants
obj = 'red_hat'

df = pd.read_csv('ring_1_05_sam.csv')
tl_x = df.iloc[5:10, 0:1] - 30
tl_y = df.iloc[5:10, 1:2] - 30
br_x = df.iloc[5:10, 0:1] + 30
br_y = df.iloc[5:10, 1:2] + 30
tl_x = (tl_x.to_string(index=False, header=False))
tl_y = (tl_y.to_string(index=False, header=False))
br_x = (br_x.to_string(index=False, header=False))
br_y = (br_y.to_string(index=False, header=False))
tl_list = (tl_x, tl_y)
br_list = (br_x, br_y)
object_list.append(obj)

write_xml(image_folder, img, object_list, tl_list, br_list, savedir)
tl_list = []
br_list = []
object_list = []

So that my write_xml function takes the first value at tl_list and br_list then the next value sequentially. Right now it tales all values at once. Any ideas how i can do it?

RE: Index in Python list contains multiple elements.How to access each val and pass them - wavic - Nov-30-2018

tl_list[0][0], tl_list[0][1]

You can loop over tl_list[0] in that case.