How to create a list of lower and upper bound values based on range in Python via for loop?-CodePudding

I have max range (x) that I need to create increments of and generate lists of values that increases by 1 from the previous value.

Example of hardcoding scenerio:

x = 50000
max_val = 16384

id1 = pd_ID.loc[0:16384,]
id2 = pd_ID.loc[16385:32768]
id3 = pd_ID.loc[32769:49152]
id4 = pd_ID.loc[49152:50000]

Goal of this exercise is to replicate this above example in a more automated approach given that x changes given each account I am working through.

Below is my current approach but you see that my first value in lower bound variable starts at 1 and not 0 (which I need it to start at first row [0].

import math
x = 50000
increment = math.ceil(x/16384)
print("increment",increment)
for i in range(increment):
  print("i=",i)
  upper_bound = (16384 * (i 1)) if i < increment-1 else x
  lower_bound = upper_bound - 16384   1 if i < increment-1 else ((16384 * (i)))   1
  print(lower_bound)
  print(upper_bound)

#####[1:16384]
#####[16385:32768]
#####[32769:49152]
#####[49152:50000]

Desired output

#####[0:16384]
#####[16385:32768]
#####[32769:49152]
#####[49152:50000]

CodePudding user response：

You can try something on those lines.

max_ = 50000

step = 16384
lower_bound = 0
upper_bound = 0
i = 0
while upper_bound < max_:
    if i != 0:
        lower_bound = upper_bound   1
        upper_bound = lower_bound   step - 1
    else:
        upper_bound = lower_bound   step
    if upper_bound > max_:
        upper_bound = max_
    print("lower", lower_bound)
    print("upper", upper_bound)
    print()
    i  = 1

lower 0
upper 16384

lower 16385
upper 32768

lower 32769
upper 49152

lower 49153
upper 50000

CodePudding user response：

You can modify this as appropriate to match how you want the range start and stop to be defined. In your example output it is not consistent.

def create_range(upper_lim: int, range_size: int):
    current = 0
    output = []
    while current < upper_lim:
        if current   range_size > upper_lim:
            output  = [range(current , upper_lim)]
        else:
            output  = [range(current, (current   range_size - 1))]    
        current  = range_size
    return output

create_range(50000, 16384)

[range(0, 16383),
 range(16384, 32767),
 range(32768, 49151),
 range(49152, 50000)]