added elevator script

other/elevator/README.md

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+# Elevator
+mini script to simulate elevator, moving between floors, has a fancy output to shell
+
+can be used as task for technical interview(write custom sorting algorithm to boost elevator speed, etc)
+
+### Run
+```shell
+$ python3 elevator.py
+```
+
+### TODO:
+
+- add passenger via class(for such properties like time)
+- make time step more ideal

other/elevator/elevator.py

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+Elevator simulator
+"""
+import os
+import random
+
+from time import sleep
+
+
+class Passenger(object):
+    __slots__ = ["frm", "to", "time", "on_elevator"]
+
+    def __init__(self, frm, to):
+        self.frm = frm
+        self.to = to
+        self.time = 0
+        self.on_elevator = False
+
+
+def clear():
+    os.system("clear")
+
+
+def add_random():
+    to = random.randint(1, 100)
+    if to < 90:
+        return
+    flr = random.randint(1, MAX_FLOORS)
+    flr2 = random.randint(1, MAX_FLOORS)
+    while flr2 == flr:
+        flr2 = random.randint(1, MAX_FLOORS)
+    next_command.append(flr)
+    next_command.append(flr2)
+
+
+def print_elevator():
+    msx = len(str(MAX_FLOORS))
+    r = ""
+    mx_n = 0
+    for i in range(MAX_FLOORS, 0, -1):
+        s = f"{i}{' ' * (msx - len(str(i)))}|"
+        if i == current_floor:
+            s += "e"
+        else:
+            s += " "
+        s += "|"
+        if i in next_command:
+            n = next_command.count(i)
+            if n + 1 > mx_n:
+                mx_n = n + 1
+            s += " " + "i" * n
+        s += "\n"
+        r += s
+    r += "_" * len(next_command)
+    clear()
+    print(r)
+
+
+# config
+MOVE_SPEED = 2
+TURN_TIME = 2
+MAX_FLOORS = 30
+
+next_command = [10, 6, 8, 30, 1]
+passengers = []
+current_floor = 1
+stop = True
+
+while True:
+    next_command = sorted(next_command, key=lambda x: abs(current_floor - x))
+    status = f"idling on floor {current_floor}"
+    if next_command:
+        if not stop:
+            if MOVE_SPEED >= abs(current_floor - next_command[0]):
+                stop = True
+                current_floor = next_command[0]
+                del next_command[0]
+                status = f"arrived to floor {current_floor}"
+            else:
+                if current_floor > next_command[0]:
+                    current_floor -= MOVE_SPEED
+                else:
+                    current_floor += MOVE_SPEED
+                status = f"moving to floor {next_command[0]}, current floor - {current_floor}"
+        else:
+            stop = False
+            status = f"stated moving to floor {next_command[0]}, current floor - {current_floor}"
+    print(status)
+    print_elevator()
+    add_random()
+    sleep(TURN_TIME)